OVERALL
ALTERNATIVES
SPECS
VS AVERAGE
REVIEWS
Scored using Motherboards Methodology v3.0
Motherboards Methodology v3.0
Mathematical & Unbiased Scoring
Products in this category are scored under Frontum Motherboards Methodology v3.0: the technical score from the specifications is the base, and independent expert and video reviews (up to ±0.5 points), owner opinions (up to ±0.3) and best-of lists (up to +0.3) move it up or down.
Explore Motherboards Methodology v3.0

ASRock X99 Extreme6 review: 109 specs compared

Avg. price:~£230CPU socket:LGA 2011-3Chipset:Intel X99Form factor:ATX

ASRock X99 Extreme6 Review: Compare 109 technical specifications and 7 expert and video reviews to see how this product ranks in the Motherboards category and whether it is worth buying.

ASRock X99 Extreme6
6.8/10

Overall score

Score
6.8/ 10
✕
What it is
Our main score for this model, 1–10. It combines specs, expert reviews, best-of lists, owners and ratings from across the web.
How we count it
Parts: Technical score 40%, Reviews score 20%, List score 20%, Sentiment score 10%, User score 10%
Marks: Each part gets a mark out of 10. For reviews, lists and owners, a typical model in this category gets about 8 and the best one gets 10.
No data yet: A part with no data shows "?". It counts as the mark of a weaker model in this category (4 in 5 models with data score higher). This way, models with reviews, lists and owners usually come out ahead.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 58% of models
Score components

40%

5.7

Technical score

20%

8.6

Reviews score

20%

?

List scoreNot enough data yet, so we use 7.5, the mark of a weaker model in this category

10%

?

Sentiment scoreNot enough data yet, so we use 7.0, the mark of a weaker model in this category

10%

5.7

User score

â–¼Worse than 58% of motherboards
7.5

Value for money

Value for money
7.5/ 10
✕
What it is
An indicator that combines the motherboard's overall rating with its cost.
When it matters
When you are looking for a motherboard that offers a strong balance of features, performance, and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 66% of models
Score components

70%

6.8

Overall score

30%

9.3

Price

â–¼Worse than 66%
5.7

Technical score

Technical score
5.7/ 10
✕
What it is
How good the specs are compared with the other models in this category, 1–10.
How we count it
Areas: We rate the specs in each area against the other models in this category.
Weighting: The areas that matter most to buyers count more. The shares are shown under Score components.
Share: The technical score is 40% of the overall score.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 58% of models
Score components

19%

8.7

Memory

16%

6.9

Platform

16%

4.1

Storage

15%

4.3

Network

13%

3.8

Ports

8%

3.4

Expansion

8%

5.4

Power & Cooling

5%

8.7

Audio

â–¼Worse than 58%
8.6

Reviews score

Reviews score
8.6/ 10
✕
What it is
Average grade from independent test sites, magazines and video reviewers, 1–10.
How we count it
Grades: Each review's own score is converted to 1–10; without one, we grade the review ourselves. Big test sites count more, short reviews half as much as full tests. A video review counts half.
Score: The average grade is 80% of the review mark; the number of reviews is the other 20% (1 review = 5, the typical number in this category = 8, the most-reviewed model = 10).
Enough data: With few reviews, the average grade is pulled toward the typical grade of this category. No reviews yet: 7.8 for now.
Share: Reviews count 20% of the overall score.
Score distribution
â–¼
<55-66-77-88-99-10
â–² Better than 78% of models

80%

8.6

Average grade

20%

8.8

Popularity

Grades by review (7)
5 reviews: 2 with a printed score, 3 estimated from the review. 2 video reviews, each counting half as much as a written test. Reviews count 20% of the overall score.
Ratings from across the web count in the User score, not in this score.
â–²Better than 78%
5.7

User score

User score
5.7/ 10
✕
What it is
How happy buyers are with this model, based on ratings from across the web.
How we count it
Enough data: A model needs at least 1 rating from across the web. Without one, it counts as 7.9, the mark of a weaker rated model in this category.
Share: User score counts 10% of the overall score.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 77% of models

5.7

Mark 7.8 is below the typical mark 8.4 of this category, so it cannot lift the score above the technical score

70%

8.1

Rating

30%

6.9

Popularity

â–¼Worse than 77%
?

List score

List score
7.5/ 10
✕
What it is
How often independent test sites, magazines and video reviewers put this model in their best-of lists for this category.
How we count it
Points: The model in the most lists of this category gets 10; the others get 8 to 10 in proportion. In no list yet: 7.5. Lists count 20% of the overall score.
Enough data: Every list counts, even a single one. With fewer than 5 best-of lists in the category, this part is left out.
Lists with this model (0)
Not in any best-of list yet, so this part counts as 7.5. Models in a list get 8 to 10.
Not in any best-of list yet
  • asrock-x99-extreme6
asrock-x99-extreme6
Where to buy
*As an Amazon Associate, we earn from qualifying purchases.
Best rankings
Available: ranking among products currently available (including other versions of this product).All: ranking among all products in the database.

What reviewers say about the ASRock X99 Extreme6

Based on 5 · 3

Reviewers praise its power delivery, cooling, audio and networking, but criticize the storage options, layout and expansion slots.
Praised
Criticised
Pick a topic to see who said what
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Technical Specifications of motherboard ASRock X99 Extreme6

Technical score
Technical score
5.7/ 10
✕
What it is
How good the specs are compared with the other models in this category, 1–10.
How we count it
Areas: We rate the specs in each area against the other models in this category.
Weighting: The areas that matter most to buyers count more. The shares are shown under Score components.
Share: The technical score is 40% of the overall score.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 58% of models
Score components:

19%

8.7

Memory

16%

6.9

Platform

16%

4.1

Storage

15%

4.3

Network

13%

3.8

Ports

8%

3.4

Expansion

8%

5.4

Power & Cooling

5%

8.7

Audio

5.7
Reviews score
8.6
User score
5.7
List score
?
Value for money
Value for money
7.5/ 10
✕
What it is
An indicator that combines the motherboard's overall rating with its cost.
When it matters
When you are looking for a motherboard that offers a strong balance of features, performance, and price.
Score distribution
â–¼
<55-66-77-88-99-10
â–¼ Worse than 66% of models
Score components:

70%

6.8

Overall score

30%

9.3

Price

7.5
CPU socket
LGA 2011-3
This motherboard uses LGA 2011-3, which is less up-to-date than 84.4% of Motherboards and the same as 2.4% of Motherboards.
CPU platform
Intel
Chipset
Intel X99
This motherboard uses Intel X99, which is less capable than 67.9% of Motherboards and as capable as 2.3% of Motherboards.
Form factor
ATX
Integrated graphics support
no
This motherboard does not support integrated graphics. 89.9% of motherboards support this feature.
Show more
DDR memory version
DDR4
This motherboard uses DDR4, which is more modern than 13.4% of Motherboards and the same as 50.4% of Motherboards.
Memory slots
8
Market range: <2 – >4
This motherboard has 8 Memory slots, which is more than 93.9% of motherboards and equal to 5.8% of motherboards.
Maximum memory capacity
256 GB
Market range: <32 GB – >256 GB
This motherboard supports up to 256 GB of memory, which is more than 82.5% of motherboards and equal to 16.7% of motherboards.
higher limit with Xeon CPU
Memory channels
4
Maximum RAM speed
2,133 MT/s
Market range: <2.1k MT/s – >8k MT/s
This motherboard supports memory speeds up to 2,133 MT/s, which is lower than that of 87.2% of motherboards and equal to that of 4.3% of motherboards.
Show more
What reviewers say
N. of M.2 sockets
1
Market range: <0 – >4
This motherboard has 1 M.2 sockets, which is fewer than 69.5% of motherboards and equal to 18.9% of motherboards.
M.2 slot interface per slot
1x PCIe 3.0 x4/SATA
This motherboard offers M.2 slots: 1x PCIe 3.0x4/SATA, which is slower than 74.3% of Motherboards and the same as 10.4% of Motherboards.
N. of SATA 3 connectors
10
Market range: <4 – >8
This motherboard has 10 SATA 3 connectors, which is more than 96.6% of motherboards and equal to 3.3% of motherboards.
some SATA ports disabled with certain M.2 use
Supported RAID levels
0/1/5/10
This motherboard RAID support: 0/1/5/10, which is more flexible than 32.5% of Motherboards and the same as 67.5% of Motherboards.
JBOD excluded from RAID-level set
NVMe RAID support
no
This motherboard does not support NVMe RAID. 59.9% of motherboards support this feature.
Show more
What reviewers say
N. of PCIe 5.0 x16 slots
0
Market range: <0 – >1
This motherboard has 0 PCIe 5.0x16 slots, which is fewer than 31.6% of motherboards and equal to 68.4% of motherboards.
N. of PCIe 4.0 x16 slots
0
Market range: <0 – >1
This motherboard has 0 PCIe 4.0x16 slots, which is fewer than 44.8% of motherboards and equal to 55.2% of motherboards.
N. of PCIe 3.0 x16 slots
3
Market range: <0 – >3
This motherboard has 3 PCIe 3.0x16 slots, which is more than 82.7% of motherboards and equal to 11.1% of motherboards.
PCIe slot electrical configuration
x16/x16/x8, x16/x8/x4
This motherboard splits its PCIe lanes as x16/x16/x8, x16/x8/x4, which is more generous than 95.5% of Motherboards and the same as 0.3% of Motherboards.
Depends on CPU.
PCIe bifurcation support
no
This motherboard does not support PCIe bifurcation. 59.8% of motherboards support this feature.
Requires BIOS mod.
Show more
What reviewers say
Total USB ports (rear I/O)
8
Market range: <6 – >10
This motherboard has 8 USB ports (rear I/O), which is more than 40.6% of motherboards and equal to 30.3% of motherboards.
Total USB ports (including headers)
17
Market range: <11 – >19
This motherboard has 17 USB ports (including headers), which is more than 71.3% of motherboards and equal to 10.4% of motherboards.
Total USB-C ports (rear I/O)
0
Market range: <0 – >2
This motherboard has 0 USB-C ports (rear I/O), which is fewer than 64.2% of motherboards and equal to 35.8% of motherboards.
Total USB-C ports (including headers)
0
Market range: <0 – >3
This motherboard has 0 USB-C ports (including headers), which is fewer than 69.5% of motherboards and equal to 30.5% of motherboards.
N. of USB 3.2 Gen2x2 ports (USB-C)
0
Market range: <0 – >1
This motherboard has 0 USB 3.2 Gen2x2 ports (USB-C), which is fewer than 18% of motherboards and equal to 82% of motherboards.
Show more
LAN speed
1 Gbps
Market range: <1 Gbps – >2.5 Gbps
This motherboard supports LAN speeds up to 1 Gbps, which is lower than that of 51.1% of motherboards and equal to that of 48.9% of motherboards.
dual 1GbE ports
LAN controller
Intel I218-V + Qualcomm Atheros AR8171
This motherboard has a Intel I218-V + Qualcomm Atheros AR8171 LAN controller, which is faster than 57.5% of Motherboards and equal to 0.1% of Motherboards.
dual LAN
N. of RJ45 ports
2
Market range: <1 – >2
This motherboard has 2 RJ45 ports, which is more than 85.6% of motherboards and equal to 13.3% of motherboards.
Wi-Fi connectivity
no
This motherboard does not support Wi-Fi connectivity. 50.1% of motherboards support this feature.
Wi-Fi version
N/A
Show more
What reviewers say
Audio codec
Realtek ALC1150
This motherboard uses Realtek ALC1150, which is higher-end than 53% of Motherboards and the same as 9.1% of Motherboards.
Audio channels
7.1
This motherboard offers 7.1 audio channels, which is more than 4.7% of motherboards and equal to 95.3% of motherboards.
Audio SNR
115 dB
Market range: <95 dB – >120 dB
This motherboard has an audio SNR of 115 dB, which is higher than that of 47.7% of motherboards and equal to that of 7.6% of motherboards.
Headphone amp support
yes
This motherboard supports a headphone amp. 41.2% of motherboards support this feature.
supports up to 600Ω.
N. of 3.5mm audio jacks
5
Market range: <2 – >6
This motherboard has 5 3.5mm audio jacks, which is more than 50.6% of motherboards and equal to 36.3% of motherboards.
Show more
What reviewers say
VRM phases
12
This motherboard has 12 VRM phases, which is more than 55.4% of motherboards and equal to 4.4% of motherboards.
N. of CPU power connectors
1
Market range: <1 – >2
This motherboard has 1 CPU power connectors, which is fewer than 45.2% of motherboards and equal to 54.9% of motherboards.
N. of fan headers
6
Market range: <3 – >8
This motherboard has 6 fan headers, which is more than 50% of motherboards and equal to 22.3% of motherboards.
Pump header
no
This motherboard does not have a pump header. 77.9% of motherboards include this feature.
Pump header max current
0 A
Market range: <0 A – >3 A
This motherboard supports up to 0 A on the pump header, which is lower than that of 76.2% of motherboards and equal to that of 23.8% of motherboards.
Show more
What reviewers say

ASRock X99 Extreme6 vs the average motherboard

246810TotalPlatformMemoryStorageExpansionPortsNetworkAudioPower & Cooling
  • 2x more maximum memory capacity
    This motherboard has more maximum memory capacity than the average motherboard (256 GB vs 128 GB). The average motherboard supports 128 GB of memory.
    higher limit with Xeon CPU
    256 GB vs 128 GB
  • 1 more RJ45 ports
    This motherboard has more RJ45 ports than the average motherboard (2 vs 1). The average motherboard has 1 RJ45 port/s.
    2 vs 1
  • 4 more memory slots
    This motherboard has more memory slots than the average motherboard (8 vs 4). The average motherboard has 4 memory slot/s.
    8 vs 4
  • Includes dual BIOS
    This motherboard has dual BIOS, while the average motherboard does not. 22.4% of motherboards include dual BIOS.
  • Includes POST code display
    This motherboard has a POST code display, while the average motherboard does not. 26.7% of motherboards include a POST code display.
  • 1 more USB 3.2 Gen1 headers
    This motherboard has more USB 3.2 Gen1 headers than the average motherboard (2 vs 1). The average motherboard has 1 USB 3.2 Gen1 header/s.
    two internal headers
    2 vs 1
  • More capable LAN controller
    This motherboard has a faster LAN controller than the average motherboard (Intel I218-V + Qualcomm Atheros AR8171 vs Killer + Intel + Realtek).
    dual LAN
    Intel I218-V + Qualcomm Atheros AR8171 vs Killer + Intel + Realtek
  • 6 more SATA 3 connectors
    This motherboard has more SATA 3 connectors than the average motherboard (10 vs 4). The average motherboard has 4 SATA 3 connectors.
    some SATA ports disabled with certain M.2 use
    10 vs 4
  • 17.8% higher review score
    Reviews score
    8.6/ 10
    ✕
    What it is
    Average grade from independent test sites, magazines and video reviewers, 1–10.
    How we count it
    Grades: Each review's own score is converted to 1–10; without one, we grade the review ourselves. Big test sites count more, short reviews half as much as full tests. A video review counts half.
    Score: The average grade is 80% of the review mark; the number of reviews is the other 20% (1 review = 5, the typical number in this category = 8, the most-reviewed model = 10).
    Enough data: With few reviews, the average grade is pulled toward the typical grade of this category. No reviews yet: 7.8 for now.
    Share: Reviews count 20% of the overall score.
    Score distribution
    â–¼
    <55-66-77-88-99-10
    â–² Better than 78% of models

    80%

    8.6

    Average grade

    20%

    8.8

    Popularity

    Grades by review (7)
    5 reviews: 2 with a printed score, 3 estimated from the review. 2 video reviews, each counting half as much as a written test. Reviews count 20% of the overall score.
    Ratings from across the web count in the User score, not in this score.
    8.6 vs 7.3
  • Includes dual BIOS
    This motherboard has dual BIOS, while the average motherboard does not. 22.4% of motherboards include dual BIOS.
  • Includes POST code display
    This motherboard has a POST code display, while the average motherboard does not. 26.7% of motherboards include a POST code display.
  • Rear-panel CMOS reset button
    This motherboard has a rear-panel CMOS reset button, while the average motherboard does not. 26.5% of motherboards include a rear-panel CMOS reset button.
  • More BIOS update methods
    This motherboard offers more BIOS update methods than the average motherboard (UEFI utility, Windows app, DOS, internet flash vs UEFI utility, flashback, Windows app).
    UEFI utility, Windows app, DOS, internet flash vs UEFI utility, flashback, Windows app
  • 2x more maximum memory capacity
    This motherboard has more maximum memory capacity than the average motherboard (256 GB vs 128 GB). The average motherboard supports 128 GB of memory.
    higher limit with Xeon CPU
    256 GB vs 128 GB
  • 4 more memory slots
    This motherboard has more memory slots than the average motherboard (8 vs 4). The average motherboard has 4 memory slot/s.
    8 vs 4
  • Supports ECC memory
    This motherboard supports ECC memory, while the average motherboard does not. 20.9% of motherboards support ECC memory.
    ECC requires compatible CPU.
  • 6 more SATA 3 connectors
    This motherboard has more SATA 3 connectors than the average motherboard (10 vs 4). The average motherboard has 4 SATA 3 connectors.
    some SATA ports disabled with certain M.2 use
    10 vs 4
  • More generous lane split
    This motherboard splits its PCIe lanes more generously than the average motherboard (x16/x16/x8, x16/x8/x4 vs x16/x0/x4, x8/x8/x4).
    Depends on CPU.
    x16/x16/x8, x16/x8/x4 vs x16/x0/x4, x8/x8/x4
  • 1 more PCIe x1 slots
    This motherboard has more PCIe x1 slots than the average motherboard (2 vs 1). The average motherboard has 1 PCIe x1 slot/s.
    2 vs 1
  • 2 more PCIe 3.0x16 slots
    This motherboard has more PCIe 3.0x16 slots than the average motherboard (3 vs 1). The average motherboard has 1 PCIe 3.0x16 slot/s.
    3 vs 1
  • 1 more USB 3.2 Gen1 headers
    This motherboard has more USB 3.2 Gen1 headers than the average motherboard (2 vs 1). The average motherboard has 1 USB 3.2 Gen1 header/s.
    two internal headers
    2 vs 1
  • 2 more total USB connections
    This motherboard has more total USB connections than the average motherboard (17 vs 15). The average motherboard has 15 total USB connections.
    17 vs 15
  • 1 more USB4 or Thunderbolt headers
    This motherboard has more USB4 or Thunderbolt headers than the average motherboard (1 vs 0). The average motherboard has 0 USB4 or Thunderbolt header/s.
    1 vs 0
  • 2 more USB 3.2 Gen1 ports
    This motherboard has more USB 3.2 Gen1 ports than the average motherboard (6 vs 4). The average motherboard has 4 USB 3.2 Gen1 port/s.
    6 vs 4
  • 1 more RJ45 ports
    This motherboard has more RJ45 ports than the average motherboard (2 vs 1). The average motherboard has 1 RJ45 port/s.
    2 vs 1
  • More capable LAN controller
    This motherboard has a faster LAN controller than the average motherboard (Intel I218-V + Qualcomm Atheros AR8171 vs Killer + Intel + Realtek).
    dual LAN
    Intel I218-V + Qualcomm Atheros AR8171 vs Killer + Intel + Realtek
  • More capable onboard audio
    This motherboard has a higher-end audio codec than the average motherboard (Realtek ALC1150 vs Realtek ALC897).
    Realtek ALC1150 vs Realtek ALC897
  • 2 more 3.5mm audio jacks
    This motherboard has more 3.5mm audio jacks than the average motherboard (5 vs 3). The average motherboard has 3 3.5mm audio jacks.
    5 vs 3
  • More VRM phases
    This motherboard has more VRM phases than the average motherboard (12 vs 10). The average motherboard has 10 VRM phase/s.
    12 vs 10
  • More basic chipset
    This motherboard uses a more basic chipset than the average motherboard (Intel X99 vs Intel B860).
    Intel X99 vs Intel B860
  • 60% lower LAN speed
    This motherboard has a lower LAN speed than the average motherboard (1 Gbps vs 2.5 Gbps). The average motherboard offers LAN speed of 2.5 Gbps.
    dual 1GbE ports
    1 Gbps vs 2.5 Gbps
  • Slower NVMe storage slots
    This motherboard has slower M.2 slots than the average motherboard (1x PCIe 3x4/SATA vs 1x PCIe 5x4, 2x PCIe 4x4).
    1x PCIe 3.0x4/SATA vs 1x PCIe 5.0x4, 2x PCIe 4.0x4
  • No NVMe RAID support
    This motherboard does not support NVMe RAID, while the average motherboard does. 59.9% of motherboards support NVMe RAID.
  • No Wi-Fi connectivity
    This motherboard does not support Wi-Fi connectivity, while the average motherboard does. 50.1% of motherboards support Wi-Fi connectivity.
  • No BIOS flashback support
    This motherboard does not support BIOS flashback, while the average motherboard does. 51.3% of motherboards support BIOS flashback.
    requires CPU/RAM
  • 1 fewer M.2 sockets
    This motherboard has fewer M.2 sockets than the average motherboard (1 vs 2). The average motherboard has 2 M.2 socket/s.
    1 vs 2
  • 1 fewer rear USB-C ports
    This motherboard has fewer rear USB-C ports than the average motherboard (0 vs 1). The average motherboard has 1 rear USB-C port/s.
    0 vs 1
  • 23.0% lower user score
    User score
    5.7/ 10
    ✕
    What it is
    How happy buyers are with this model, based on ratings from across the web.
    How we count it
    Enough data: A model needs at least 1 rating from across the web. Without one, it counts as 7.9, the mark of a weaker rated model in this category.
    Share: User score counts 10% of the overall score.
    Score distribution
    â–¼
    <55-66-77-88-99-10
    â–¼ Worse than 77% of models

    5.7

    Mark 7.8 is below the typical mark 8.4 of this category, so it cannot lift the score above the technical score

    70%

    8.1

    Rating

    30%

    6.9

    Popularity

    5.7 vs 7.4
  • 53.3% more expensive
    ASRock X99 Extreme6 is more expensive than the average motherboard (£230 vs £150).
    £230 vs £150
  • 2.2% worse value for money
    ASRock X99 Extreme6 has worse value for money than the average motherboard (7.53 vs 7.7).
    7.53 vs 7.7
  • More basic chipset
    This motherboard uses a more basic chipset than the average motherboard (Intel X99 vs Intel B860).
    Intel X99 vs Intel B860
  • No BIOS flashback support
    This motherboard does not support BIOS flashback, while the average motherboard does. 51.3% of motherboards support BIOS flashback.
    requires CPU/RAM
  • No integrated graphics support
    This motherboard does not support integrated graphics, while the average motherboard does. 89.8% of motherboards support integrated graphics.
  • Not ready for Windows 11
    This motherboard is not ready for Windows 11, while the average motherboard is. 77.4% of motherboards are ready for Windows 11.
  • No debug LED indicators
    This motherboard does not have debug LED indicators, while the average motherboard does. 78.7% of motherboards include debug LED indicators.
  • Narrower Windows support
    This motherboard supports a narrower range of Windows versions than the average motherboard (Windows 10, Windows 8.1, Windows 8, Windows 7 vs Windows 11, Windows 10).
    Windows 10, Windows 8.1, Windows 8, Windows 7 vs Windows 11, Windows 10
  • More dated socket
    This motherboard uses a more dated socket than the average motherboard (LGA 2011-3 vs LGA 1151).
    LGA 2,011-3 vs LGA 1,151
  • 54.6% lower maximum RAM speed
    This motherboard has a lower maximum RAM speed than the average motherboard (2,133 MT/s vs 4,699.5 MT/s). The average motherboard supports RAM speed of 4,699.5 MT/s.
    2,133 MT/s vs 4,699.5 MT/s
  • 40% lower overclocked RAM speed
    This motherboard has a lower overclocked RAM speed than the average motherboard (3,000 MT/s vs 5,000 MT/s). The average motherboard supports overclocked RAM speed of 5,000 MT/s.
    3,000 MT/s vs 5,000 MT/s
  • Slower NVMe storage slots
    This motherboard has slower M.2 slots than the average motherboard (1x PCIe 3x4/SATA vs 1x PCIe 5x4, 2x PCIe 4x4).
    1x PCIe 3.0x4/SATA vs 1x PCIe 5.0x4, 2x PCIe 4.0x4
  • No NVMe RAID support
    This motherboard does not support NVMe RAID, while the average motherboard does. 59.9% of motherboards support NVMe RAID.
  • 1 fewer M.2 sockets
    This motherboard has fewer M.2 sockets than the average motherboard (1 vs 2). The average motherboard has 2 M.2 socket/s.
    1 vs 2
  • No PCIe bifurcation support
    This motherboard does not support PCIe bifurcation, while the average motherboard does. 59.7% of motherboards support PCIe bifurcation.
    Requires BIOS mod.
  • 1 fewer rear USB-C ports
    This motherboard has fewer rear USB-C ports than the average motherboard (0 vs 1). The average motherboard has 1 rear USB-C port/s.
    0 vs 1
  • 1 fewer USB 3.2 Gen2 ports
    This motherboard has fewer USB 3.2 Gen2 ports than the average motherboard (0 vs 1). The average motherboard has 1 USB 3.2 Gen2 port/s.
    0 vs 1
  • 1 fewer DisplayPort outputs
    This motherboard has fewer DisplayPort outputs than the average motherboard (0 vs 1). The average motherboard has 1 DisplayPort outputs.
    0 vs 1
  • 1 fewer total USB-C connections
    This motherboard has fewer total USB-C connections than the average motherboard (0 vs 1). The average motherboard has 1 total USB-C connections.
    0 vs 1
  • 60% lower LAN speed
    This motherboard has a lower LAN speed than the average motherboard (1 Gbps vs 2.5 Gbps). The average motherboard offers LAN speed of 2.5 Gbps.
    dual 1GbE ports
    1 Gbps vs 2.5 Gbps
  • No Wi-Fi connectivity
    This motherboard does not support Wi-Fi connectivity, while the average motherboard does. 50.1% of motherboards support Wi-Fi connectivity.
  • No Wi-Fi antenna included
    This motherboard does not include a Wi-Fi antenna, while the average motherboard does. 51.1% of motherboards include a Wi-Fi antenna.
  • 2 fewer ARGB headers
    This motherboard has fewer ARGB headers than the average motherboard (0 vs 2). The average motherboard has 2 ARGB header/s.
    0 vs 2
  • No pump header
    This motherboard does not have a pump header, while the average motherboard does. 77.9% of motherboards include a pump header.
  • 1 fewer RGB headers
    This motherboard has fewer RGB headers than the average motherboard (0 vs 1). The average motherboard has 1 RGB header/s.
    0 vs 1
  • 2 A lower pump header current limit
    This motherboard has a lower pump header current than the average motherboard (0 A vs 2 A). The average motherboard provides pump header current of 2 A.
    0 A vs 2 A

Video reviews

Hands-on testing, unboxing, and real-world video evaluations

9.5
Tech YES City
≈ estimated
09/07/2015
Hands-on review · stability, audio and USB 3.1 tests
Verdict
ASRock X99 Extreme6 is a rock-solid board with excellent features and utility, recommended over other X99 options for a new build.
9.0
Tech YES City
≈ estimated
01/01/2015
Hands-on review · audio, BIOS and power tests
Verdict
ASRock X99 Extreme6 is recommended for anyone who wants a board that simply works, despite its plain looks and power draw.
8.0
brian botkiller
≈ estimated
15/02/2017
Unboxing · first look at board and features
Verdict
ASRock X99 Extreme6 is a good-looking board with a solid feature set and quick boot times, though it has fewer full-size PCIe slots.
Hands-on video, no verdict
Overview video
Not graded
Hands-on video, no verdict

Expert reviews

In-depth analysis and verdict from leading tech publications

9.0
eteknix.com
≈ estimated
29/11/2014
Full review · Extreme series
Verdict
The ASRock X99 Extreme6 is a well-rounded X99 board with strong power and dual LAN, but it skips SATA Express and offers no built-in Wi-Fi.
7.0
tomshardware.com
≈ estimated
26/01/2015
Full review · Wi-Fi X99 board
Verdict
The ASRock X99 Extreme6/ac is an X99 board with built-in Wi-Fi, but its lane layout limits the Core i7-5820K to two-way SLI.
9.0
geeknetic.es
✓ explicit
24/09/2014
Full review · Generalist X99 board
Verdict
The ASRock X99 Extreme6 is an all-round X99 board with up to 128GB of RAM and strong power delivery, but it lacks SATA Express.
9.0
rehwolution.it
✓ explicit
24/09/2014
Full review · Haswell-E platform
Verdict
The ASRock X99 Extreme6 is an affordable, well-built X99 board with strong performance and audio, lacking only a SATA Express port.
9.5
hwready.it
≈ estimated
08/09/2015
Full review · USB 3.1 version
Verdict
The ASRock X99 Extreme6 USB 3.1 is a solid overclocking board with a USB 3.1 Type-C port, but its 3-way SLI needs a 40-lane CPU.

Third-party reviews

What customers like about ASRock X99 Extreme6

  • Excellent overall performance in memory, 3D, and IO benchmarks
  • Strong thermal performance with effective VRM heat sinks
  • Highly versatile and easy-to-use UEFI interface for overclocking
  • Premium build quality featuring 12K Platinum Caps and 12-phase power design
  • Advanced storage features including an 'Ultra M.2' slot (up to 32 Gb/s) and HDD Saver
  • Good value for money compared to higher-end X99 competitors
  • Solid audio performance via Purity Sound 2 implementation

What customers don't like about ASRock X99 Extreme6

  • Using the Ultra M.2 slot disables the last PCIe 3.0 x16 slot, limiting multi-GPU configurations
  • Lacks support for 4-way GPU setups, which may be a drawback for certain workstation builds
  • WiFi module is not standard on the base model (only included in 'ac' or '3.1' variants)
  • Considered slightly less cost-effective than its sibling, the X99 Extreme4, which offers similar core features for less
  • The dual BIOS switch can be difficult to access physically once installed in a case

Verdict

The ASRock X99 Extreme6 is a high-performance ATX motherboard built for the LGA 2011-3 socket, supporting Intel Core i7 and Xeon E5 series processors with a robust 12-phase power design. It features eight DDR4 DIMM slots for up to 128GB of quad-channel memory, an Ultra M.2 (PCIe Gen3 x4) slot delivering 32Gb/s, and three PCIe 3.0 x16 slots for 3-way SLI or CrossFireX configurations. Key pros include excellent overclocking stability, dual Gigabit LAN ports, high-quality Purity Sound 2 audio, and server-grade support for ECC RDIMM modules. However, common drawbacks include the disabling of the fifth PCIe slot when the Ultra M.2 is occupied and some reported complexities with BIOS updates for NVMe boot support.

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