Intel Core i9 12900KS Review | 78 Data compared

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  • Avg. price in UK: ~£330
  • Avg. price in US: ~$450
  • PassMark benchmark result: 43452
  • N. of physical cores: 16
  • CPU boost clock speed: 5.5 GHz

Intel Core i9 12900KS review. Compare 78 technical specifications and user reviews to see how it ranks among processors and if it is worth buying.

8.0

Overall score

What it is: An overall evaluation of the processor's quality, based on technical analyses and user reviews.

When it matters: When you need a quick reference to identify the best processors on the market.

Score components:

90.0%

7.8

Technical Score

10.0%

9.4

User score

Excellent
7.8

Technical Score

What it is: An assessment of the processor's technical performance, covering key areas such as processing performance, core configuration, efficiency, platform support, integrated features, and thermal behavior.

When it matters: When you want to compare processors based on technical performance and available features.

Score components:

60.0%

8.2

Performance

18.0%

8.1

Cache & Architecture

10.0%

8.4

Memory & PCIe

7.0%

2.3

Power & Thermal

4.0%

8.5

Platform

1.0%

7.4

Integrated Graphics

Very good
9.4

User score

What it is: A rating that combines user reviews and the total number of reviews received by the processor.

When it matters: When you want to know how a processor performs in real workloads and how reliable it is for gaming, productivity, and efficiency according to user feedback.

Score components:

70.0%

9.1

User reviews

30.0%

10

Popularity

User score:
United Kingdom
amazon
4.6
(971)
amazon
4.5
(359)
amazon
4.6
(2)

(Reviews last updated: May 2026)

Exceptional
  • 7.8
    Gaming

    Score components:

    30.0%

    8.4

    PassMark single-core benchmark score

    25.0%

    7.9

    Geekbench 6 single-core benchmark score

    20.0%

    9.1

    CPU boost clock speed

    17.0%

    5.2

    L3 cache

    8.0%

    6.7

    N. of physical cores

  • 7.7
    Video editing

    Score components:

    45.0%

    9.0

    Geekbench 6 multi-core benchmark score

    20.0%

    6.7

    N. of physical cores

    20.0%

    7.6

    CPU threads

    15.0%

    5.2

    L3 cache

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Best rankings

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Available: ranking among products currently available (including other versions of this product).
All: ranking among all products in the database.

Verdict

The Intel Core i9-12900KS is a flagship, special-edition 'Alder Lake' processor featuring 16 cores (8 Performance-cores and 8 Efficient-cores) and 24 threads, built on the Intel 7 process. It is characterized by its high clock speeds, reaching a 5.5 GHz max turbo frequency via Intel Thermal Velocity Boost, with a 3.4 GHz base frequency for P-cores and a 150W processor base power. Main pros include being among the world's fastest desktop processors for single-core tasks, excellent gaming and CAD performance, and using highly binned silicon for better stability. However, it suffers from very high power consumption (up to 241W turbo), extreme heat output requiring premium cooling solutions, and a significant price premium for only marginal performance gains over the standard i9-12900K.

Technical Specifications of processor Intel Core i9 12900KS

Technical Score

What it is: An assessment of the processor's technical performance, covering key areas such as processing performance, core configuration, efficiency, platform support, integrated features, and thermal behavior.

When it matters: When you want to compare processors based on technical performance and available features.

Score components:

60.0%

8.2

Performance

18.0%

8.1

Cache & Architecture

10.0%

8.4

Memory & PCIe

7.0%

2.3

Power & Thermal

4.0%

8.5

Platform

1.0%

7.4

Integrated Graphics

7.8
Intel Core i9 12900KS has a technical score of 7.8 points, which is higher than that of 94.4% of products in this category.
User score

What it is: A rating that combines user reviews and the total number of reviews received by the processor.

When it matters: When you want to know how a processor performs in real workloads and how reliable it is for gaming, productivity, and efficiency according to user feedback.

Score components:

70.0%

9.1

User reviews

30.0%

10

Popularity

User score:
United Kingdom
amazon
4.6
(971)
amazon
4.5
(359)
amazon
4.6
(2)

(Reviews last updated: May 2026)

9.4
Intel Core i9 12900KS has a user score of 9.4 points, which is higher than that of 92% of products in this category.
Popularity
What it is: An indicator based on the number of reviews received by the processor.
When it matters: When you prefer to choose a processor reviewed and selected by many other buyers.
10
Intel Core i9 12900KS has a popularity of 10 points, which is higher than 88.3% of products in this category.
Ratio quality/price

What it is: An indicator that combines the processor's overall rating with its cost.

When it matters: When you are looking for a processor with a good balance between performance, efficiency, and price.

Score components:

60.0%

8.0

Overall score

40.0%

8.8

Price

8.2
Intel Core i9 12900KS has a quality-to-price ratio of 8.2 points, which is higher than 96.9% of products in this category.
Brand name
What it is: The manufacturer or brand of the product.
When it matters: When you prefer a specific ecosystem, support network, or design philosophy.

Importance: MEDIUM

Intel
Processor type
What it is: The kind of system the processor is built for, such as desktop PCs, laptops, workstations, or servers.
When it matters: When you want a processor meant for the kind of machine you are actually building or buying, rather than a chip aimed at a different class of system.

Importance: HIGH

desktop
Intel Core i9 12900KS belongs to the desktop processor class, which is more advanced than that of 56% of processors and equal to that of 37.9% of processors.
CPU socket
What it is: The physical socket the processor fits into on the motherboard.
When it matters: When you need to make sure the CPU can actually be installed on a specific motherboard.

Importance: HIGH

LGA1700
Intel Core i9 12900KS uses the LGA1700 CPU socket, which is newer than that of 86.1% of processors and equal to that of 7.4% of processors.
Chipset
What it is: The motherboard chipset families officially meant to work with the processor.
When it matters: When you are checking whether a CPU will work with the motherboard features and platform you plan to use.

Importance: HIGH

Z790, H770, B760, Z690, H670, B660, H610, Q670, W680
Intel Core i9 12900KS supports Z790, H770, B760, Z690, H670, B660, H610, Q670, W680 chipsets, which is broader compatibility than 86.2% of processors and equal to that of 2.2% of processors.
CPU architecture
What it is: The processor family or design generation behind the chip, such as Zen 4 or Raptor Lake.
When it matters: When you are comparing CPUs across generations and want a clearer sense of their design age, feature level, and expected performance class.

Importance: HIGH

x86-64
Intel Core i9 12900KS uses the x86-64 architecture, which is more advanced than that of 1.7% of processors and equal to that of 98.3% of processors.
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N. of physical cores
What it is: The number of physical CPU cores on the processor.
When it matters: When you run workloads that benefit from more real cores.

Importance: HIGH

Good value: 8+

16
Intel Core i9 12900KS has 16 CPU cores, which is more than 91.5% of processors and equal to 4% of processors.
CPU threads
What it is: The total number of processing threads the CPU can handle at once.
When it matters: When you run heavily threaded workloads or multitask a lot.

Importance: HIGH

Good value: 16+

24
Intel Core i9 12900KS offers 24 CPU threads, which is more than 90.3% of processors and equal to 4% of processors.
Threads per core
What it is: The number of threads each physical core can handle at once.
When it matters: When you want to understand how much thread-level parallelism each core can provide in multitasking or heavily threaded work.

Importance: MEDIUM

Good value: 2

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CPU boost clock speed
What it is: The highest clock speed the processor can reach under boost conditions.
When it matters: When you care about peak speed in short bursts.

Importance: HIGH

Good value: >4.7 GHz

5.5 GHz
Intel Core i9 12900KS reaches a boost clock of 5.5 GHz which is higher than that of 97.6% of processors and equal to that of 0.7% of processors.
CPU base clock speed
What it is: The processor's normal all-core starting frequency before boost behavior raises clocks temporarily.
When it matters: When you care about steadier performance in longer workloads rather than short burst speed alone.

Importance: MEDIUM

8 x 3.4 GHz & 8 x 2.5 GHz
Intel Core i9 12900KS has a base clock of 8x3.4 GHz & 8x2.5 GHz which is equal to that of 100% of processors.
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Semiconductor size
What it is: The manufacturing process node used to produce the processor, usually expressed in nanometers.
When it matters: When efficiency, heat, and the relative modernity of the chip-making process matter to your comparison.

Importance: HIGH

Good value: <10 nm

10 nm
Intel Core i9 12900KS uses a 10 nm process node, which is more advanced than that of 52.3% of processors and equal to that of 19.1% of processors.
Foundry
What it is: The semiconductor manufacturer that physically fabricates the processor chip.
When it matters: When process source, manufacturing generation, or foundry differences matter to your comparison more than day-to-day performance alone.

Importance: MEDIUM

Intel 7
Intel Core i9 12900KS is built on the Intel 7 foundry process, which is more advanced than that of 66.2% of processors and equal to that of 14.9% of processors.
L3 cache
What it is: The total amount of L3 cache available on the processor.
When it matters: When you want better performance in cache-sensitive workloads and games.

Importance: MEDIUM

Good value: >=16 MB

30 MB
Intel Core i9 12900KS has an L3 cache of 30 MB which is larger than that of 88.1% of processors and equal to that of 1.5% of processors.
L2 cache
What it is: The total amount of L2 cache available across the processor.
When it matters: When you want to compare CPU design efficiency and how much fast intermediate cache the cores have available.

Importance: MEDIUM

Good value: >=6 MB

14 MB
Intel Core i9 12900KS has an L2 cache of 14 MB which is larger than that of 87.5% of processors and equal to that of 2.2% of processors.
L1 cache
What it is: The total amount of L1 cache built into the processor, which sits closest to the cores.
When it matters: When you are comparing low-level CPU design details rather than the broader performance picture buyers usually notice first.

Importance: MEDIUM

Good value: >=512 KB

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DDR memory version
What it is: The RAM generation the processor is designed to support, such as DDR4 or DDR5.
When it matters: When you need the CPU to match the kind of memory platform you want to buy or reuse.

Importance: MEDIUM

Good value: DDR5

DDR4/DDR5
Intel Core i9 12900KS supports DDR DDR4/DDR5, which is newer than that of 79.1% of processors and equal to that of 9.7% of processors.
Maximum memory speed
What it is: The highest official memory speed supported by the processor.
When it matters: When you choose RAM and want to know the supported speed ceiling.

Importance: HIGH

Good value: >=4800 MHz

4,800 MHz
Intel Core i9 12900KS supports memory speeds up to 4,800 MHz, which is higher than that of 66.4% of processors and equal to 5.6% of processors.
Max memory speed (JEDEC)
What it is: The highest official RAM speed the processor supports under standard JEDEC settings, before any memory overclocking profiles are applied.
When it matters: When officially supported stock RAM speed matters more than XMP, EXPO, or manual memory tuning.

Importance: MEDIUM

Good value: >=5600 MHz

DDR5-4800 MHz
Intel Core i9 12900KS supports JEDEC memory speeds up to DDR5-4,800 MHz, which is higher than that of 66.5% of processors and equal to 5.6% of processors.
Max memory speed (XMP / EXPO)
What it is: The highest memory speed supported through XMP or EXPO profiles.
When it matters: When you want faster RAM through memory profiles.

Importance: MEDIUM

Good value: >=5200 MHz

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Maximum memory capacity
What it is: The largest total amount of memory officially supported by the processor.
When it matters: When you plan a system with very large RAM capacity.

Importance: HIGH

Good value: >=128 GB

128 GB
Intel Core i9 12900KS supports up to 128 GB of memory, which is more than 61.9% of processors and equal to 21.4% of processors.
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Integrated graphics
What it is: Includes built-in graphics, so the system can output video without a separate graphics card.
When it matters: When you want the PC to work without a dedicated GPU, or you are building an office, media, compact, or troubleshooting-friendly system.

Importance: HIGH

yes
Intel Core i9 12900KS includes integrated graphics. 87.6% include integrated graphics.
Integrated GPU model
What it is: The model name of the integrated graphics processor, if present.
When it matters: When you plan to use the CPU's built-in graphics.

Importance: MEDIUM

Intel UHD Graphics 770
Intel Core i9 12900KS uses the Intel UHD Graphics 770 integrated GPU, which is more advanced than that in 56.9% and equal to that in 4.9%.
Integrated GPU execution units
What it is: The number of execution units available in the integrated graphics part of the processor.
When it matters: When you plan to rely on built-in graphics and want a better sense of its light gaming, display, or media capability.

Importance: MEDIUM

Good value: >=24

32
Intel Core i9 12900KS has 32 GPU execution units, which is more than 70.8% of processors and equal to 9.9% of processors.
Integrated GPU base frequency
What it is: The base operating frequency of the integrated GPU.
When it matters: When integrated graphics performance matters to you.

Importance: MEDIUM

Good value: >=350 MHz

300 MHz
Intel Core i9 12900KS has an integrated GPU clock of 300 MHz which is lower than that of 57% of processors and equal to that of 38.7% of processors.
Integrated media encoders/decoders
What it is: The hardware media formats the processor can encode or decode directly.
When it matters: When you stream, edit video, or rely on hardware media acceleration.

Importance: LOW

AV1 (HW decode)
Intel Core i9 12900KS supports AV1 (HW decode) media codecs, which is narrower support than 63.1% of processors and equal to 10.8% of processors.
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TDP (Thermal design power)
What it is: The rated thermal design power, which gives a general idea of cooling and power needs.
When it matters: When you choose a cooler or build in a tighter case.

Importance: HIGH

Good value: <30 W

150 W
Intel Core i9 12900KS has a TDP of 150 W which is higher than that of 95.6% of processors and equal to that of 0.2% of processors.
Base power (PL1)
What it is: The sustained power target used for longer CPU loads.
When it matters: When you choose cooling and power delivery for sustained workloads.

Importance: MEDIUM

Good value: <30 W

150 W
Intel Core i9 12900KS has a base power of 150 W which is higher than that of 95.6% of processors and equal to that of 0.2% of processors.
Boost power (PL2)
What it is: The short-term boost power limit the processor may draw under heavier turbo loads.
When it matters: When you size cooling and power delivery for peak turbo behavior.

Importance: MEDIUM

Good value: <50 W

241 W
Intel Core i9 12900KS has a boost power of 241 W which is higher than that of 95.9% of processors and equal to that of 0.1% of processors.
Tau (power duration limit)
What it is: The time limit the CPU can stay at higher boost power before dropping toward sustained power.
When it matters: When you want to understand turbo behavior under longer loads.

Importance: MEDIUM

Good value: <=28 s

N/A
Configurable TDP
What it is: Allows the processor to run in alternate power modes instead of being fixed to one default TDP target.
When it matters: When you want more control over heat, noise, and power draw in compact systems, quieter builds, or thermally limited machines.

Importance: LOW

no
Intel Core i9 12900KS does not support configurable TDP. 52.9% support configurable TDP.
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Intel Core i9 12900KS vs the average processor

  • 3.86x better multi-core performance
    Intel Core i9 12900KS has a higher multi-core performance than the average processor (10,744 vs 2,783). The average processor scores 2,783 in Cinebench R20 multi-core.
    What it is: A Cinebench R20 score that reflects how well the processor handles long, heavy rendering workloads across many cores.
    When it matters: When you care about sustained multi-core performance in rendering, compiling, heavy creation work, or productivity workloads that use many threads.

    Importance: HIGH

    Good value: >4700

    Intel Core i9 12900KS has a higher multi-core performance than the average processor (10,744 vs 2,783). The average processor scores 2,783 in Cinebench R20 multi-core.10,744 vs 2,783
  • 74.2% better single-core performance
    Intel Core i9 12900KS has a higher PassMark single-core score than the average processor (4,326 vs 2,483). The average processor scores 2,483 in PassMark single-core.
    What it is: A benchmark score that reflects single-core CPU performance.
    When it matters: When you care about responsiveness in lighter or older software.

    Importance: HIGH

    Good value: >3200

    Intel Core i9 12900KS has a higher PassMark single-core score than the average processor (4,326 vs 2,483). The average processor scores 2,483 in PassMark single-core.4,326 vs 2,483
  • 4.13x higher PassMark score
    Intel Core i9 12900KS has a higher PassMark benchmark score than the average processor (43,452 vs 10,532.5). The average processor scores 10,532.5 in PassMark benchmark.
    What it is: A benchmark score that gives a broad idea of overall processor performance.
    When it matters: When you want a quick overall performance comparison.

    Importance: HIGH

    Good value: >19000

    Intel Core i9 12900KS has a higher PassMark benchmark score than the average processor (43,452 vs 10,532.5). The average processor scores 10,532.5 in PassMark benchmark.43,452 vs 10,532.5
  • 27.9% higher boost clock
    Intel Core i9 12900KS has a higher boost clock speed than the average processor (5.5 GHz vs 4.3 GHz). The average processor reaches boost clock speed of 4.3 GHz.
    What it is: The highest clock speed the processor can reach under boost conditions.
    When it matters: When you care about peak speed in short bursts.

    Importance: HIGH

    Good value: >4.7 GHz

    Intel Core i9 12900KS has a higher boost clock speed than the average processor (5.5 GHz vs 4.3 GHz). The average processor reaches boost clock speed of 4.3 GHz.5.5 GHz vs 4.3 GHz
  • 84.4% higher single-core score
    Intel Core i9 12900KS has a higher Geekbench 6 single-core score than the average processor (2,713 vs 1,471). The average processor scores 1,471 in Geekbench 6 single-core.
    What it is: A Geekbench 6 score that reflects single-core CPU performance in mixed modern workloads.
    When it matters: When you care about snappy everyday performance in lighter apps, browsing, office work, or tasks that do not scale well across many cores.

    Importance: HIGH

    Good value: >2000

    Intel Core i9 12900KS has a higher Geekbench 6 single-core score than the average processor (2,713 vs 1,471). The average processor scores 1,471 in Geekbench 6 single-core.2,713 vs 1,471
  • 10 more CPU cores
    Intel Core i9 12900KS has more CPU cores than the average processor (16 vs 6). The average processor has 6 CPU cores.
    What it is: The number of physical CPU cores on the processor.
    When it matters: When you run workloads that benefit from more real cores.

    Importance: HIGH

    Good value: 8+

    Intel Core i9 12900KS has more CPU cores than the average processor (16 vs 6). The average processor has 6 CPU cores.16 vs 6
  • 16 more CPU threads
    Intel Core i9 12900KS has more CPU threads than the average processor (24 vs 8). The average processor has 8 CPU threads.
    What it is: The total number of processing threads the CPU can handle at once.
    When it matters: When you run heavily threaded workloads or multitask a lot.

    Importance: HIGH

    Good value: 16+

    Intel Core i9 12900KS has more CPU threads than the average processor (24 vs 8). The average processor has 8 CPU threads.24 vs 8
  • Newer PCIe version
    Intel Core i9 12900KS supports a newer PCIe version than the average processor (5.0 + 4.0 vs 3.0).
    What it is: The newest PCIe generation the processor can use directly for graphics cards, SSDs, and other high-speed expansion devices.
    When it matters: When you want support for newer GPUs or SSDs, or more bandwidth for high-speed expansion hardware.

    Importance: HIGH

    Good value: 4.0

    Intel Core i9 12900KS supports a newer PCIe version than the average processor (5.0 + 4.0 vs 3.0).5.0 + 4.0 vs 3.0
  • Modern CPU socket
    Intel Core i9 12900KS uses a more modern CPU socket than the average processor (LGA1700 vs FP2).
  • Supports HMP
    Intel Core i9 12900KS supports HMP, the average processor does not.
  • Includes crypto acceleration
    Intel Core i9 12900KS includes crypto acceleration, the average processor does not.
  • 3.86x better multi-core performance
    Intel Core i9 12900KS has a higher multi-core performance than the average processor (10,744 vs 2,783). The average processor scores 2,783 in Cinebench R20 multi-core.
  • 74.2% better single-core performance
    Intel Core i9 12900KS has a higher PassMark single-core score than the average processor (4,326 vs 2,483). The average processor scores 2,483 in PassMark single-core.
  • 4.13x higher PassMark score
    Intel Core i9 12900KS has a higher PassMark benchmark score than the average processor (43,452 vs 10,532.5). The average processor scores 10,532.5 in PassMark benchmark.
  • 27.9% higher boost clock
    Intel Core i9 12900KS has a higher boost clock speed than the average processor (5.5 GHz vs 4.3 GHz). The average processor reaches boost clock speed of 4.3 GHz.
  • 84.4% higher single-core score
    Intel Core i9 12900KS has a higher Geekbench 6 single-core score than the average processor (2,713 vs 1,471). The average processor scores 1,471 in Geekbench 6 single-core.
  • 10 more CPU cores
    Intel Core i9 12900KS has more CPU cores than the average processor (16 vs 6). The average processor has 6 CPU cores.
  • 16 more CPU threads
    Intel Core i9 12900KS has more CPU threads than the average processor (24 vs 8). The average processor has 8 CPU threads.
  • Unlocked for overclocking
    Intel Core i9 12900KS has an unlocked multiplier, the average processor does not.
  • 2 wider front-end design
    Intel Core i9 12900KS has a higher front-end width than the average processor (6 vs 4). The average processor uses front-end width of 4.
  • 5.6x larger L2 cache
    Intel Core i9 12900KS has a higher L2 cache than the average processor (14 MB vs 2.5 MB). The average processor has L2 cache of 2.5 MB.
  • 3.75x larger L3 cache
    Intel Core i9 12900KS has a higher L3 cache than the average processor (30 MB vs 8 MB). The average processor has L3 cache of 8 MB.
  • 2.5x more L2 per core
    Intel Core i9 12900KS has more L2 cache per core than the average processor (1.3 MB/core vs 0.5 MB/core). The average processor provides 0.5 MB/core of L2 cache per core.
  • Uses big.LITTLE design
    Intel Core i9 12900KS uses a big.LITTLE design, the average processor does not.
  • More advanced microarchitecture
    Intel Core i9 12900KS uses a more advanced microarchitecture than the average processor (Alder Lake vs Kaby Lake).
  • More advanced foundry
    Intel Core i9 12900KS uses a more advanced foundry process than the average processor (Intel 7 vs Intel 14 nm).
  • 16.7% smaller process node
    Intel Core i9 12900KS has a lower process node than the average processor (10 nm vs 12 nm). The average processor uses a process node of 12 nm.
  • Newer PCIe version
    Intel Core i9 12900KS supports a newer PCIe version than the average processor (5.0 + 4.0 vs 3.0).
  • Newer DDR support
    Intel Core i9 12900KS supports a newer DDR generation than the average processor (DDR4/DDR5 vs DDR4).
  • Supports memory overclocking
    Intel Core i9 12900KS supports memory overclocking, the average processor does not.
  • 4 more PCIe lanes
    Intel Core i9 12900KS has more PCIe lanes than the average processor (20 vs 16). The average processor offers 16 PCIe lanes.
  • 67.7% higher memory bandwidth
    Intel Core i9 12900KS has a higher memory bandwidth than the average processor (76.8 GB/s vs 45.8 GB/s). The average processor offers memory bandwidth of 45.8 GB/s.
  • 2x more memory capacity
    Intel Core i9 12900KS has more maximum memory capacity than the average processor (128 GB vs 64 GB). The average processor supports 64 GB of memory.
  • Supports ECC memory
    Intel Core i9 12900KS supports ECC memory, the average processor does not.
  • 63.7% higher memory speed
    Intel Core i9 12900KS has a higher maximum memory speed than the average processor (4,800 MHz vs 2,933 MHz). The average processor supports memory speed of 2,933 MHz.
  • 1 more supported displays
    Intel Core i9 12900KS has more supported displays than the average processor (4 vs 3). The average processor supports 3 displays.
  • 10 °C lower CPU temperature
    Intel Core i9 12900KS has a lower CPU temperature than the average processor (90 °C vs 100 °C). The average processor runs at a CPU temperature of 100 °C.
  • 20.8% larger die size
    Intel Core i9 12900KS has a higher die size than the average processor (215 mm² vs 178 mm²). The average processor has a die size of 178 mm².
  • Narrower media codec support
    Intel Core i9 12900KS supports fewer media codecs than the average processor (AV1 (HW decode) vs H.264 (HW decode/encode), H.265 (HW decode/encode), VP9 (HW decode/encode), AV1 (HW decode)).
  • 3.77x higher boost power
    Intel Core i9 12900KS has a higher boost power draw than the average processor (241 W vs 64 W). The average processor has a boost power draw of 64 W.
  • 3.33x higher base power
    Intel Core i9 12900KS has a higher base power draw than the average processor (150 W vs 45 W). The average processor has a base power draw of 45 W.
  • 3.33x higher TDP
    Intel Core i9 12900KS has a higher TDP than the average processor (150 W vs 45 W). The average processor has a TDP of 45 W.
  • No configurable TDP
    Intel Core i9 12900KS does not support configurable TDP, the average processor does.
  • 3.77x higher boost power
    Intel Core i9 12900KS has a higher boost power draw than the average processor (241 W vs 64 W). The average processor has a boost power draw of 64 W.
    What it is: The short-term boost power limit the processor may draw under heavier turbo loads.
    When it matters: When you size cooling and power delivery for peak turbo behavior.

    Importance: MEDIUM

    Good value: <50 W

    Intel Core i9 12900KS has a higher boost power draw than the average processor (241 W vs 64 W). The average processor has a boost power draw of 64 W.241 W vs 64 W
  • 3.33x higher base power
    Intel Core i9 12900KS has a higher base power draw than the average processor (150 W vs 45 W). The average processor has a base power draw of 45 W.
    What it is: The sustained power target used for longer CPU loads.
    When it matters: When you choose cooling and power delivery for sustained workloads.

    Importance: MEDIUM

    Good value: <30 W

    Intel Core i9 12900KS has a higher base power draw than the average processor (150 W vs 45 W). The average processor has a base power draw of 45 W.150 W vs 45 W
  • 3.33x higher TDP
    Intel Core i9 12900KS has a higher TDP than the average processor (150 W vs 45 W). The average processor has a TDP of 45 W.
    What it is: The rated thermal design power, which gives a general idea of cooling and power needs.
    When it matters: When you choose a cooler or build in a tighter case.

    Importance: HIGH

    Good value: <30 W

    Intel Core i9 12900KS has a higher TDP than the average processor (150 W vs 45 W). The average processor has a TDP of 45 W.150 W vs 45 W
  • No configurable TDP
    Intel Core i9 12900KS does not support configurable TDP, the average processor does.
    What it is: Allows the processor to run in alternate power modes instead of being fixed to one default TDP target.
    When it matters: When you want more control over heat, noise, and power draw in compact systems, quieter builds, or thermally limited machines.

    Importance: LOW

    Intel Core i9 12900KS does not support configurable TDP, the average processor does.
  • 20.8% larger die size
    Intel Core i9 12900KS has a higher die size than the average processor (215 mm² vs 178 mm²). The average processor has a die size of 178 mm².
    What it is: The physical area of the processor die, usually measured in square millimeters.
    When it matters: When you are comparing chip scale, packaging density, or broader design differences rather than direct user-visible performance.

    Importance: LOW

    Good value: <150 mm²

    Intel Core i9 12900KS has a higher die size than the average processor (215 mm² vs 178 mm²). The average processor has a die size of 178 mm².215 mm² vs 178 mm²
  • Narrower media codec support
    Intel Core i9 12900KS supports fewer media codecs than the average processor (AV1 (HW decode) vs H.264 (HW decode/encode), H.265 (HW decode/encode), VP9 (HW decode/encode), AV1 (HW decode)).
    What it is: The hardware media formats the processor can encode or decode directly.
    When it matters: When you stream, edit video, or rely on hardware media acceleration.

    Importance: LOW

    Intel Core i9 12900KS supports fewer media codecs than the average processor (AV1 (HW decode) vs H.264 (HW decode/encode), H.265 (HW decode/encode), VP9 (HW decode/encode), AV1 (HW decode)).AV1 (HW decode) vs H.264 (HW decode/encode), H.265 (HW decode/encode), VP9 (HW decode/encode), AV1 (HW decode)
  • 32% more expensive
    Intel Core i9 12900KS is more expensive than the average processor (£330 vs £250).
    Intel Core i9 12900KS is more expensive than the average processor (£330 vs £250).£330 vs £250

Graphic comparison of Intel Core i9 12900KS and other processors

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Third-party reviews

(Reviews last updated: May 2026)

What customers like about Intel Core i9 12900KS?

  • Extreme out-of-the-box clock speeds reaching up to 5.5GHz on favored cores.
  • Superior single-core performance, making it one of the fastest chips for gaming and modeling tasks.
  • Highly binned silicon offers better stability and headroom for enthusiast overclocking.
  • Features integrated graphics (Xe LP iGPU), unlike some high-end competitors.
  • Excellent for professional multitasking and heavy content creation in apps like Adobe Creative Cloud.
  • Includes a unique 'Special Edition' collectors' tin packaging.

What customers dislike about Intel Core i9 12900KS?

  • Requires high-end cooling solutions (360mm AIO or custom loop) due to extreme heat output.
  • High power consumption with a base power draw increased to 150W.
  • Poor value for money, with a significant price premium for only 2-5% performance gains over the standard i9-12900K.
  • Prone to thermal throttling under heavy sustained loads even with robust cooling.
  • Does not include a stock cooler, adding to the total system cost.
  • Niche appeal; difficult for average users or gamers to justify over more affordable alternatives like the i7-12700K.

Expert reviews

L
lowyat.net
09/06/2022

The Intel Core i9-12900KS is a pre-binned "special edition" processor designed for maximum performance, featuring 16 cores (8P + 8E) and 24 threads with boosted clock speeds up to 5.5GHz. While providing superior single-threaded performance and support for DDR5 and PCIe 5.0, the review notes only marginal, non-groundbreaking gains in gaming frame rates compared to the standard...Read more

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wepc.com
18/12/2024

The WePC review defines the Intel Core i9-12900KS as a high-performance, "Special Edition" Alder Lake processor featuring 16 cores and a 5.5GHz boost clock, positioned as a faster, higher-binned alternative to the i9-12900K. It provides marginal performance gains of roughly 2% in gaming and 4-5% in synthetic tasks over the standard model, targeting users seeking maximum speed....Read more

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hothardware.com
28/06/2022

The Intel Core i9-12900KS is a 16-core, 24-thread "Special Edition" Alder Lake flagship, boasting 5.5GHz max turbo frequencies on its P-cores, a 300MHz increase over the i9-12900K. It serves as a new performance leader, outperforming rivals in productivity, while supporting DDR5 and PCIe Gen 5.0, though it requires significant power and high-end cooling. Despite its superior speed,...Read more

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uk.pcmag.com
15/06/2022

The PCMag review characterizes the Intel Core i9-12900KS as a "Special Edition" flagship, highlighting its blistering 5.5GHz boost speed on two performance cores and a versatile 16-core design. Despite the high performance, significant cons include extreme thermal and power demands, with the chip frequently hitting 99 degrees Celsius and triggering thermal throttling even with...Read more

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techspot.com
05/04/2022

The Intel Core i9-12900KS is identified by TechSpot as a special edition, top-tier processor that sets a new performance bar for desktop CPUs, featuring a 5.5 GHz boost clock. Despite achieving best-in-class performance in both single-core and multi-core applications, performance gains are marginal at only 1% to 6% over the standard i9-12900K, offering, according to TechSpot,...Read more

C
cgmagonline.com
01/07/2022

CGMagazine describes the Intel Core i9-12900KS as a "new performance king" of the 12th-gen family, utilizing a higher-binned design to achieve 5.5GHz speeds and superior gaming performance. The chip outperforms its predecessor, the 12900K, offering marginal FPS increases in titles like Cyberpunk 2077 and significant improvements in productivity, such as 25% faster speeds in Adobe...Read more

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tweaktown.com
20/04/2022

The Intel Core i9-12900KS "Alder Lake" review by TweakTown highlights this "Special Edition" processor as a highly binned, elite chip designed for maximum performance, featuring a 5.5GHz peak boost clock and delivering top-tier single-core scores in benchmarks like Cinebench R23. While establishing itself as the fastest desktop processor at launch, the review notes the performance...Read more

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kitguru.net
29/04/2022

Leo Waldock’s review for KitGuru describes the Intel Core i9-12900KS as a high-performance "white elephant" that pushes clock speeds to 5.5GHz on two cores and 5.2GHz on all cores at an extreme cost in power and heat. While offering top-tier performance, the CPU is criticized for inefficiently achieving these speeds by maxing out thermal limits and, in some cases, demanding a custom...Read more

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pcmag.com
15/06/2022

The Intel Core i9-12900KS is a "Special Edition" 16-core processor designed for maximum performance, featuring a 5.5GHz boost clock that provides marginal gains in specific workloads over the standard i9-12900K. The chip demands intense thermal management, frequently hitting 99 degrees Celsius and requiring top-tier liquid cooling to avoid performance-sapping thermal throttling...Read more

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pcwelt.de
13/04/2022

The PC-WELT review identifies the Intel Core i9-12900KS as a specialized, high-bin processor that reaches 5.5GHz to secure the title of fastest desktop CPU, offering 3–6% better performance over the standard i9-12900K in specific tasks. While delivering top-tier performance for applications and gaming, the CPU requires immense power and generates significant heat, often drawing over...Read more

C
computerbase.de
12/04/2022

The Intel Core i9-12900KS is a pre-binned, factory-overclocked Alder Lake processor reaching 5.5 GHz on up to two cores and 5.2 GHz on all cores, with base power raised to 150W. While it is the fastest desktop CPU at launch, performance gains are limited to a 2% to 5% improvement over the standard 12900K, making the increase in games and applications minor. The chip suffers from...Read more

H
hardwarecooking.fr
26/05/2022

The Intel Core i9-12900KS, as tested by HardwareCooking, is a "Special Edition" Alder Lake processor, functioning as a pre-binned 12900K with boosted clocks up to 5.5 GHz and 16 cores (8 E). It offers marginal, roughly 3% to 6% performance gains in productivity and gaming over the standard 12900K, making it a niche product for maximum, out-of-the-box performance enthusiasts. Key...Read more

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elchapuzasinformatico.com
07/04/2022

The Intel Core i9-12900KS is a specially binned, factory-overclocked 16-core processor designed to reach 5.5 GHz, offering marginal performance gains of 2% to 7% over the standard i9-12900K. Achieving these speeds requires a 150W base TDP, with power consumption peaking near 270W and necessitating high-end liquid cooling to prevent thermal throttling, as temperatures frequently...Read more

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profesionalreview.com
16/04/2022

The Intel Core i9-12900KS is a "Special Edition" 16-core Alder Lake processor, utilizing high-quality "binned" silicon to achieve a 5.5 GHz boost frequency, targeting extreme enthusiasts and creators. Pros include best-in-class performance in professional applications like Photoshop (up to 6% faster than the 12900K) and robust platform support with PCIe 5.0 and DDR5. Cons center on...Read more

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digitec.ch
05/04/2022

The Intel Core i9-12900KS, highlighted in the Digitec review roundup, acts as a pre-binned, higher-clocked "Special Edition" of the Alder Lake lineup, boasting peak P-core frequencies of 5.5 GHz to secure top-tier single-core performance. While offering 16 cores (8P + 8E) for strong content creation, the processor is targeted at enthusiasts rather than average users, with high power...Read more

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tvtech.it
20/04/2022

The Intel Core i9-12900KS, a "binned" version of the 12900K, reaches 5.5 GHz on two cores and maintains 16 cores/24 threads, offering marginal 1-9% performance gains over the standard model. Pros include record-breaking frequencies and superior single-threaded performance for enthusiasts, while cons feature extreme power draw, high thermal output requiring top-tier cooling, and a...Read more

T
tomshw.it
28/02/2022

The Intel Core i9-12900KS, a "Special Edition" 12th Gen Alder Lake processor, is a binned version of the i9-12900K, reaching record-setting frequencies of 5.5 GHz on two P-cores and 5.2 GHz across all P-cores. While offering unparalleled single-threaded performance and being a top-tier gaming choice, its gains over the standard 12900K are marginal, typically yielding only 1-3 FPS...Read more

H
hwupgrade.it
20/04/2022

The Intel Core i9-12900KS is a pre-binned Alder Lake processor designed for maximum performance, featuring a 5.5 GHz single-core and 5.2 GHz all-core boost frequency. It offers unrivaled speeds and plug-and-play performance for gaming and content creation, with support for DDR4/DDR5 and PCIe 5.0. However, the chip requires extreme cooling due to high power consumption (exceeding...Read more

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