ASUS Prime X399 A Review | 107 Data compared
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ASUS Prime X399 A Review | 107 Data compared

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  • Avg. price in UK: ~£260
  • Avg. price in US: ~$350
  • CPU socket: TR4
  • Chipset: AMD X399
  • Form factor: E-ATX

ASUS Prime X399 A review. Compare 107 technical specifications and user reviews to see how this product ranks in the Motherboards category and whether it is worth buying.

6.7

Overall score

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

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

Score components:

90.0%

6.5

Technical Score

10.0%

7.8

User score

Good
6.5

Technical Score

What it is: An assessment of technical performance for products in the Motherboards category across these key areas: Platform & Features, Memory, Storage, Expansion, Ports & USB, Network, Audio, Power & Cooling.

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

Score components:

19.0%

6.9

Memory

16.0%

7.5

Platform & Features

16.0%

6.3

Storage

15.0%

3.5

Network

13.0%

7.0

Ports & USB

8.0%

6.0

Expansion

8.0%

7.8

Power & Cooling

5.0%

9.6

Audio

Good
7.8

User score

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

When it matters: When you want to understand how a motherboard performs in real-world builds and how reliable it is in terms of stability, BIOS usability, connectivity, and long-term ownership.

Score components:

70.0%

8.0

User reviews

30.0%

7.3

Popularity

User score:
United Kingdom
amazon
4.2
(97)
amazon
3.8
(38)
United States
Amazon_logo.png
4.1
(99)
Amazon_logo.png
4.0
(38)

(Reviews last updated: May 2026)

Very good
  • 3.6
    Gaming

    Score components:

    28.0%

    6.0

    VRM phases

    22.0%

    5.5

    N. of M.2 sockets

    18.0%

    1.0

    LAN speed

    17.0%

    2.5

    Maximum RAM speed

    15.0%

    1.0

    N. of PCIe 5.0 x16 slots

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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 ASUS Prime X399-A is an Extended ATX motherboard designed for AMD Ryzen Threadripper processors on the TR4 socket, featuring the X399 chipset and support for up to 128GB of quad-channel DDR4 memory at speeds up to 3600MHz (O.C.). Key characteristics include four steel-reinforced PCIe 3.0 x16 slots supporting 3-way SLI/CrossFireX, dual M.2 slots (one vertical, one with a heatsink), and a wide array of connectivity including a front-panel USB 3.1 Gen 2 header and a U.2 port. Main pros include its relatively affordable price point for an HEDT platform, robust 11-phase VRM, and ASUS 5-Way Optimization for easy one-click overclocking and cooling. However, cons include a limited number of SATA ports (six) and M.2 slots compared to higher-end boards, the absence of onboard Wi-Fi, and a single gigabit LAN port lacking redundant or high-speed 10Gb options.

Technical Specifications of motherboard ASUS Prime X399 A

Technical Score

What it is: An assessment of technical performance for products in the Motherboards category across these key areas: Platform & Features, Memory, Storage, Expansion, Ports & USB, Network, Audio, Power & Cooling.

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

Score components:

19.0%

6.9

Memory

16.0%

7.5

Platform & Features

16.0%

6.3

Storage

15.0%

3.5

Network

13.0%

7.0

Ports & USB

8.0%

6.0

Expansion

8.0%

7.8

Power & Cooling

5.0%

9.6

Audio

6.5
ASUS Prime X399 A has a technical score of 6.53 points, which is higher than that of 51.6% 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 motherboard.

When it matters: When you want to understand how a motherboard performs in real-world builds and how reliable it is in terms of stability, BIOS usability, connectivity, and long-term ownership.

Score components:

70.0%

8.0

User reviews

30.0%

7.3

Popularity

User score:
United Kingdom
amazon
4.2
(97)
amazon
3.8
(38)
United States
Amazon_logo.png
4.1
(99)
Amazon_logo.png
4.0
(38)

(Reviews last updated: May 2026)

7.8
ASUS Prime X399 A has a user score of 7.82 points, which is lower than that of 69.9% of products in this category.
Popularity
What it is: An indicator based on the number of reviews received by the motherboard.
When it matters: When you prefer a motherboard that has already been bought and reviewed by many other users.
7.3
ASUS Prime X399 A has a popularity of 7.3 points, which is higher than 62.9% of products in this category.
Ratio quality/price

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 components:

60.0%

6.7

Overall score

40.0%

9.2

Price

7.4
ASUS Prime X399 A has a quality-to-price ratio of 7.4 points, which is higher than 47.3% of products in this category.
Brand name
What it is: The brand that makes the motherboard.
When it matters: When you have a brand preference for support, BIOS, or build quality.

Importance: LOW

Asus
CPU socket
What it is: The socket type the motherboard is built to support.
When it matters: When you need the motherboard to match a specific CPU.

Importance: HIGH

TR4
ASUS Prime X399 A uses the TR4 CPU socket, which is more advanced than that of 53.9% of motherboards and equal to that of 0.5% of motherboards.
CPU platform
What it is: The processor platform supported by the motherboard, indicating compatibility with Intel or AMD processors.
When it matters: When choosing a motherboard to match your chosen processor brand (Intel or AMD).

Importance: LOW

Good value: Intel

AMD
ASUS Prime X399 A is built for the AMD CPU platform, which is less common than that of 68.5% of motherboards and equal to that of 31.5% of motherboards.
Chipset
What it is: The chipset that defines the motherboard platform and many of its features.
When it matters: When you compare platform features, connectivity, and CPU support.

Importance: HIGH

AMD X399
ASUS Prime X399 A uses the AMD X399 chipset, which is less advanced than that of 64.8% of motherboards and equal to that of 0.5% of motherboards.
Form factor
What it is: The physical size standard of the motherboard, such as ATX or Micro-ATX.
When it matters: When you need the board to fit a specific case size.

Importance: LOW

E-ATX
ASUS Prime X399 A has the E-ATX form factor, which is less versatile than that of 92% of motherboards and equal to that of 6.8% of motherboards.
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DDR memory version
What it is: The RAM generation the motherboard supports, such as DDR4 or DDR5.
When it matters: When you need the board to match a certain memory platform.

Importance: HIGH

Good value: DDR5

DDR4
ASUS Prime X399 A uses DDR4 memory, which is newer than that of 13.5% of motherboards and equal to that of 50.8% of motherboards.
Memory slots
What it is: The number of RAM slots on the motherboard.
When it matters: When you want more room for future memory upgrades.

Importance: MEDIUM

Good value: >=4

8
ASUS Prime X399 A has 8 Memory slots, which is more than 94% of motherboards and equal to 5.7% of motherboards.
Maximum memory capacity
What it is: The largest total amount of RAM the motherboard supports.
When it matters: When you plan a build with very high memory capacity.

Importance: HIGH

Good value: >=128 GB

128 GB
ASUS Prime X399 A supports up to 128 GB of memory, which is more than 40.4% of motherboards and equal to 31.9% of motherboards.
Memory channels
What it is: The memory channel configuration supported by the motherboard platform.
When it matters: When memory bandwidth matters for your build.

Importance: LOW

4
ASUS Prime X399 A supports 4 memory channels, which is more than 92.9% of motherboards and equal to 6.8% of motherboards.
Maximum RAM speed
What it is: The highest officially supported memory speed for the motherboard.
When it matters: When you choose RAM and want to know the supported speed ceiling.

Importance: LOW

Good value: >=6400 MT/s

2,666 MT/s
ASUS Prime X399 A supports memory speeds up to 2,666 MT/s, which is lower than that of 79% of motherboards and equal to that of 4.6% of motherboards.
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N. of M.2 sockets
What it is: The number of M.2 slots available on the motherboard.
When it matters: When you want room for more NVMe or M.2 drives.

Importance: HIGH

Good value: >=3

2
ASUS Prime X399 A has 2 M.2 sockets, which is more than 30.8% of motherboards and equal to 34.4% of motherboards.
M.2 slot interface per slot
What it is: The storage or PCIe interface available for each M.2 slot on the motherboard.
When it matters: When you want to check which drives each M.2 slot can use.

Importance: MEDIUM

1x PCIe 3 x4/SATA, 1x PCIe 3 x4
ASUS Prime X399 A offers 1x PCIe 3.0x4/SATA, 1x PCIe 3.0x4 for M.2 slot interfaces, which is slower than that of 64.3% of motherboards and equal to that of 3.3% of motherboards.
N. of SATA 3 connectors
What it is: The number of SATA 6Gb/s connectors on the motherboard.
When it matters: When you plan to connect multiple SATA drives.

Importance: LOW

Good value: >=6

6
ASUS Prime X399 A has 6 SATA 3 connectors, which is more than 52.6% of motherboards and equal to 32.1% of motherboards.
Supported RAID levels
What it is: The RAID modes officially supported by the motherboard storage platform.
When it matters: When you plan to use multiple drives in a RAID setup.

Importance: LOW

0/1/10
ASUS Prime X399 A supports RAID levels 0/1/10, which is narrower than 68.1% of motherboards and equal to 23.3% of motherboards.
NVMe RAID support
What it is: Shows whether the board supports RAID configurations that use NVMe SSDs.
When it matters: When you plan to use multiple NVMe drives in RAID.

Importance: MEDIUM

yes
ASUS Prime X399 A supports NVMe RAID. 40.3% of motherboards support this feature.
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N. of PCIe 5.0 x16 slots
What it is: The number of PCIe 5.0 x16 physical slots on the motherboard.
When it matters: When you want the newest high-bandwidth expansion slots.

Importance: LOW

Good value: >=1

0
ASUS Prime X399 A has 0 PCIe 5.0x16 slots, which is fewer than 31.5% of motherboards and equal to 68.5% of motherboards.
N. of PCIe 4.0 x16 slots
What it is: The number of PCIe 4.0 x16 physical slots on the motherboard.
When it matters: When you want more room for modern expansion cards.

Importance: LOW

Good value: >=1

0
ASUS Prime X399 A has 0 PCIe 4.0x16 slots, which is fewer than 44.5% of motherboards and equal to 55.5% of motherboards.
N. of PCIe 3.0 x16 slots
What it is: The number of PCIe 3.0 x16 physical slots on the motherboard.
When it matters: When you need more full-length expansion slots.

Importance: LOW

4
ASUS Prime X399 A has 4 PCIe 3.0x16 slots, which is more than 93.9% of motherboards and equal to 3.4% of motherboards.
PCIe slot electrical configuration
What it is: The actual lane wiring used by the motherboard PCIe slots.
When it matters: When you need to know how much bandwidth each slot really gets.

Importance: LOW

x16/x8/x16/x8
ASUS Prime X399 A uses x16/x8/x16/x8 for PCIe slot electrical configuration, which is more flexible than that of 98.3% of motherboards and equal to that of 0.4% of motherboards.
PCIe bifurcation support
What it is: Shows whether the board can split PCIe lanes across multiple devices from one slot or link.
When it matters: When you plan multi-SSD adapters or more advanced expansion setups.

Importance: LOW

Good value: yes

yes
ASUS Prime X399 A supports PCIe bifurcation. 40.4% of motherboards support this feature.
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Total USB ports (rear I/O)
What it is: The total number of rear USB ports available on the motherboard.
When it matters: When you use many USB devices directly from the back of the PC.

Importance: HIGH

Good value: >=8

10
ASUS Prime X399 A has 10 USB ports (rear I/O), which is more than 75.5% of motherboards and equal to 15.5% of motherboards.
Total USB ports (including headers)
What it is: The total number of USB ports supported when rear ports and internal headers are counted together.
When it matters: When you want to know the board's full USB expansion potential.

Importance: MEDIUM

Good value: >=14

20
ASUS Prime X399 A has 20 USB ports (including headers), which is more than 91.3% of motherboards and equal to 2.9% of motherboards.
Total USB-C ports (rear I/O)
What it is: The total number of rear USB-C ports on the motherboard.
When it matters: When you want more USB-C devices connected without adapters.

Importance: MEDIUM

Good value: >=1

1
ASUS Prime X399 A has 1 USB-C ports (rear I/O), which is more than 35.5% of motherboards and equal to 48.7% of motherboards.
Total USB-C ports (including headers)
What it is: The total number of USB-C ports supported when rear ports and internal headers are counted together.
When it matters: When you want more USB-C connectivity across the whole build.

Importance: LOW

Good value: >=2

1
ASUS Prime X399 A has 1 USB-C ports (including headers), which is more than 30.4% of motherboards and equal to 21.3% of motherboards.
N. of USB 3.2 Gen2x2 ports (USB-C)
What it is: The number of rear USB 3.2 Gen2x2 Type-C ports on the motherboard.
When it matters: When you want very fast USB-C connectivity on the rear I/O.

Importance: LOW

Good value: >=1

0
ASUS Prime X399 A has 0 USB 3.2 Gen2x2 ports (USB-C), which is fewer than 18.3% of motherboards and equal to 81.7% of motherboards.
10Gbps excluded.
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LAN speed
What it is: The maximum wired Ethernet speed supported by the motherboard.
When it matters: When you want faster wired networking.

Importance: HIGH

Good value: 2.5GbE

1 Gbps
ASUS Prime X399 A supports LAN speeds up to 1 Gbps, which is lower than that of 50.8% of motherboards and equal to that of 49.2% of motherboards.
LAN controller
What it is: The model of onboard Ethernet controller used by the motherboard.
When it matters: When you compare networking hardware quality and features.

Importance: MEDIUM

Intel I211-AT
ASUS Prime X399 A uses the Intel I211-AT LAN controller, which is more advanced than that of 50.6% of motherboards and equal to that of 2.3% of motherboards.
N. of RJ45 ports
What it is: The number of wired Ethernet ports on the motherboard.
When it matters: When you need one or more wired network connections.

Importance: MEDIUM

1
ASUS Prime X399 A has 1 RJ45 ports, which is fewer than 14.4% of motherboards and equal to 85.6% of motherboards.
Wi-Fi connectivity
What it is: Shows whether the motherboard includes onboard Wi-Fi hardware instead of requiring a separate adapter.
When it matters: When you want wireless networking without adding an extra card.

Importance: LOW

Good value: yes

no
ASUS Prime X399 A does not support Wi-Fi connectivity. 50.1% of motherboards support this feature.
Wi-Fi version
What it is: The supported Wi-Fi generation, such as Wi-Fi 6 or Wi-Fi 7.
When it matters: When you care about wireless speed and router compatibility.

Importance: HIGH

Good value: Wi-Fi 6E (802.11ax)

N/A
Show more
Audio codec
What it is: The onboard audio codec used by the motherboard.
When it matters: When sound quality from the built-in audio matters to you.

Importance: MEDIUM

Realtek S1220A
ASUS Prime X399 A uses the Realtek S1,220A audio codec, which is more advanced than that of 85.7% of motherboards and equal to that of 1% of motherboards.
Audio channels
What it is: The audio channel configuration supported by the onboard sound solution.
When it matters: When you want surround sound from the motherboard audio outputs.

Importance: LOW

Good value: 7.1

7.1
ASUS Prime X399 A offers 7.1 audio channels, which is more than 4.9% of motherboards and equal to 95.1% of motherboards.
Audio SNR
What it is: The signal-to-noise ratio of the onboard audio solution.
When it matters: When you care about cleaner onboard audio output.

Importance: LOW

Good value: >=120 dB

120 dB
ASUS Prime X399 A has an audio SNR of 120 dB, which is higher than that of 56% of motherboards and equal to that of 40.5% of motherboards.
Headphone amp support
What it is: Shows whether the onboard audio path includes dedicated headphone amplification for harder-to-drive headsets.
When it matters: When you use harder-to-drive headphones from the onboard audio.

Importance: LOW

Good value: yes

yes
ASUS Prime X399 A supports a headphone amp. 40.8% of motherboards support this feature.
headphone amp on rear port.
N. of 3.5mm audio jacks
What it is: The number of rear 3.5mm audio jacks on the motherboard.
When it matters: When you want more analog audio connection options.

Importance: LOW

Good value: >=5

5
ASUS Prime X399 A has 5 3.5mm audio jacks, which is more than 49.6% of motherboards and equal to 37% of motherboards.
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VRM phases
What it is: The number of power-delivery phases used by the motherboard VRM.
When it matters: When you care about CPU power delivery and overclocking headroom.

Importance: MEDIUM

Good value: >=12

8+3
ASUS Prime X399 A has 8+3 VRM phases, which is fewer than 52% of motherboards and equal to 0.4% of motherboards.
N. of CPU power connectors
What it is: The number of CPU power connectors on the motherboard.
When it matters: When you care about power delivery for higher-end CPUs.

Importance: LOW

Good value: >=2

2
ASUS Prime X399 A has 2 CPU power connectors, which is more than 54.6% of motherboards and equal to 45.1% of motherboards.
N. of fan headers
What it is: The number of headers available for case or CPU fans.
When it matters: When your build uses several fans.

Importance: LOW

Good value: >=6

7
ASUS Prime X399 A has 7 fan headers, which is more than 72.4% of motherboards and equal to 9.8% of motherboards.
Pump header
What it is: Shows whether the motherboard includes a dedicated header designed for a liquid-cooling pump.
When it matters: When you build with an AIO or custom liquid cooling loop.

Importance: LOW

Good value: yes

yes
ASUS Prime X399 A has a pump header. 21.9% of motherboards include this feature.
Pump header max current
What it is: The maximum current the dedicated pump header can supply.
When it matters: When you want to make sure the pump header can power your cooling setup.

Importance: LOW

Good value: >=2 A

3 A
ASUS Prime X399 A supports up to 3 A on the pump header, which is higher than that of 77.8% of motherboards and equal to that of 22.1% of motherboards.
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ASUS Prime X399 A vs the average motherboard

  • 4 more memory slots
    ASUS Prime X399 A has more memory slots than the average motherboard (8 vs 4). The average motherboard has 4 memory slot/s.
    What it is: The number of RAM slots on the motherboard.
    When it matters: When you want more room for future memory upgrades.

    Importance: MEDIUM

    Good value: >=4

    ASUS Prime X399 A has more memory slots than the average motherboard (8 vs 4). The average motherboard has 4 memory slot/s.8 vs 4
  • 2 more rear USB ports
    ASUS Prime X399 A has more rear USB ports than the average motherboard (10 vs 8). The average motherboard has 8 rear USB port/s.
    What it is: The total number of rear USB ports available on the motherboard.
    When it matters: When you use many USB devices directly from the back of the PC.

    Importance: HIGH

    Good value: >=8

    ASUS Prime X399 A has more rear USB ports than the average motherboard (10 vs 8). The average motherboard has 8 rear USB port/s.10 vs 8
  • Better audio codec
    ASUS Prime X399 A has better audio codec than the average motherboard (Realtek S1,220A vs Realtek ALC897). The average motherboard uses Realtek ALC897 audio codec.
    What it is: The onboard audio codec used by the motherboard.
    When it matters: When sound quality from the built-in audio matters to you.

    Importance: MEDIUM

    ASUS Prime X399 A has better audio codec than the average motherboard (Realtek S1,220A vs Realtek ALC897). The average motherboard uses Realtek ALC897 audio codec.Realtek S1220A vs Realtek ALC897
  • 5 more total USB connections
    ASUS Prime X399 A has more total USB connections than the average motherboard (20 vs 15). The average motherboard has 15 total USB connections.
    What it is: The total number of USB ports supported when rear ports and internal headers are counted together.
    When it matters: When you want to know the board's full USB expansion potential.

    Importance: MEDIUM

    Good value: >=14

    ASUS Prime X399 A has more total USB connections than the average motherboard (20 vs 15). The average motherboard has 15 total USB connections.20 vs 15
  • 1 more CPU power connectors
    ASUS Prime X399 A has more CPU power connectors than the average motherboard (2 vs 1). The average motherboard has 1 CPU power connectors.
    What it is: The number of CPU power connectors on the motherboard.
    When it matters: When you care about power delivery for higher-end CPUs.

    Importance: LOW

    Good value: >=2

    ASUS Prime X399 A has more CPU power connectors than the average motherboard (2 vs 1). The average motherboard has 1 CPU power connectors.2 vs 1
  • Newer CPU socket
    ASUS Prime X399 A has newer CPU socket than the average motherboard (TR4 vs LGA 1,151). The average motherboard uses LGA 1,151 CPU socket.
    What it is: The socket type the motherboard is built to support.
    When it matters: When you need the motherboard to match a specific CPU.

    Importance: HIGH

    ASUS Prime X399 A has newer CPU socket than the average motherboard (TR4 vs LGA 1,151). The average motherboard uses LGA 1,151 CPU socket.TR4 vs LGA 1151
  • Includes POST code display
    ASUS Prime X399 A has a POST code display, while the average motherboard does not. 27.2% of motherboards include a POST code display.
    Q-Code display.
    What it is: Shows whether the board includes a diagnostic POST code readout for boot troubleshooting.
    When it matters: When you troubleshoot boot issues and want clearer error information.

    Importance: LOW

    Good value: yes

    ASUS Prime X399 A has a POST code display, while the average motherboard does not. 27.2% of motherboards include a POST code display.
  • 1 more USB 3.2 Gen2 USB-C ports
    ASUS Prime X399 A has more USB 3.2 Gen2 USB-C ports than the average motherboard (1 vs 0). The average motherboard has 0 USB 3.2 Gen2 USB-C port/s.
    What it is: The number of rear USB 3.2 Gen2 Type-C ports on the motherboard.
    When it matters: When you want faster rear USB-C connectivity.

    Importance: LOW

    Good value: >=1

    ASUS Prime X399 A has more USB 3.2 Gen2 USB-C ports than the average motherboard (1 vs 0). The average motherboard has 0 USB 3.2 Gen2 USB-C port/s.1 vs 0
  • Newer CPU socket
    ASUS Prime X399 A has newer CPU socket than the average motherboard (TR4 vs LGA 1,151). The average motherboard uses LGA 1,151 CPU socket.
  • Includes POST code display
    ASUS Prime X399 A has a POST code display, while the average motherboard does not. 27.2% of motherboards include a POST code display.
  • Includes onboard power button
    ASUS Prime X399 A has an onboard power button, while the average motherboard does not. 27.7% of motherboards include an onboard power button.
  • Includes onboard reset button
    ASUS Prime X399 A has an onboard reset button, while the average motherboard does not. 27.6% of motherboards include an onboard reset button.
  • 4 more memory slots
    ASUS Prime X399 A has more memory slots than the average motherboard (8 vs 4). The average motherboard has 4 memory slot/s.
  • Supports ECC memory
    ASUS Prime X399 A supports ECC memory, while the average motherboard does not. 21% of motherboards support ECC memory.
  • More memory channels
    ASUS Prime X399 A has more memory channels than the average motherboard (4 vs 2). The average motherboard has 2 memory channel/s.
  • 2 more SATA 3 connectors
    ASUS Prime X399 A has more SATA 3 connectors than the average motherboard (6 vs 4). The average motherboard has 4 SATA 3 connectors.
  • 1 more PCIe x4 slots
    ASUS Prime X399 A has more PCIe x4 slots than the average motherboard (1 vs 0). The average motherboard has 0 PCIe x4 slot/s.
  • More flexible PCIe lane configuration
    ASUS Prime X399 A has more flexible PCIe lane configuration than the average motherboard (x16/x8/x16/x8 vs x16/x0/x4, x8/x8/x4). The average motherboard uses x16/x0/x4, x8/x8/x4 PCIe slot lane configuration.
  • 3 more PCIe 3.0x16 slots
    ASUS Prime X399 A has more PCIe 3.0x16 slots than the average motherboard (4 vs 1). The average motherboard has 1 PCIe 3.0x16 slot/s.
  • 2 more rear USB ports
    ASUS Prime X399 A has more rear USB ports than the average motherboard (10 vs 8). The average motherboard has 8 rear USB port/s.
  • 5 more total USB connections
    ASUS Prime X399 A has more total USB connections than the average motherboard (20 vs 15). The average motherboard has 15 total USB connections.
  • 1 more USB 3.2 Gen2 USB-C ports
    ASUS Prime X399 A has more USB 3.2 Gen2 USB-C ports than the average motherboard (1 vs 0). The average motherboard has 0 USB 3.2 Gen2 USB-C port/s.
  • 1 more USB 3.2 Gen1 headers
    ASUS Prime X399 A 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.
  • 4 more USB 3.2 Gen1 ports
    ASUS Prime X399 A has more USB 3.2 Gen1 ports than the average motherboard (8 vs 4). The average motherboard has 4 USB 3.2 Gen1 port/s.
  • More advanced LAN controller
    ASUS Prime X399 A has better LAN controller than the average motherboard (Intel I211-AT vs Killer + Intel + Realtek). The average motherboard uses Killer + Intel + Realtek LAN controller.
  • Better audio codec
    ASUS Prime X399 A has better audio codec than the average motherboard (Realtek S1,220A vs Realtek ALC897). The average motherboard uses Realtek ALC897 audio codec.
  • 5 dB higher audio SNR
    ASUS Prime X399 A has a higher audio SNR than the average motherboard (120 dB vs 115 dB). The average motherboard has audio SNR of 115 dB.
  • 1 more CPU power connectors
    ASUS Prime X399 A has more CPU power connectors than the average motherboard (2 vs 1). The average motherboard has 1 CPU power connectors.
  • 1.5 more fan headers
    ASUS Prime X399 A has more fan headers than the average motherboard (7 vs 5.5). The average motherboard has 5.5 fan header/s.
  • 1 more RGB headers
    ASUS Prime X399 A has more RGB headers than the average motherboard (2 vs 1). The average motherboard has 1 RGB header/s.
  • 1 A higher pump header current limit
    ASUS Prime X399 A has a higher pump header current than the average motherboard (3 A vs 2 A). The average motherboard provides pump header current of 2 A.

Total
Platform & Features
Memory
Storage
Expansion
Ports & USB
Network
Audio
Power & Cooling
  • More basic motherboard chipset
    ASUS Prime X399 A has more basic motherboard chipset than the average motherboard (AMD X399 vs Intel B860). The average motherboard uses Intel B860 chipset.
  • No integrated graphics support
    ASUS Prime X399 A does not support integrated graphics, while the average motherboard does. 89.5% of motherboards support integrated graphics.
  • Less versatile form factor
    ASUS Prime X399 A has less versatile form factor than the average motherboard (E-ATX vs ATX). The average motherboard comes in ATX form factor.
  • Older CPU platform
    ASUS Prime X399 A uses the AMD CPU platform compared to Intel on the average motherboard. The average motherboard uses Intel CPU platform.
  • 4 older release date
    ASUS Prime X399 A is older than the average motherboard (2017 vs 2021). The average motherboard was released in 2021.
    August 2017
  • 43.7% lower maximum RAM speed
    ASUS Prime X399 A has a lower maximum RAM speed than the average motherboard (2,666 MT/s vs 4,733 MT/s). The average motherboard supports RAM speed of 4,733 MT/s.
  • 27% lower overclocked RAM speed
    ASUS Prime X399 A has a lower overclocked RAM speed than the average motherboard (3,600 MT/s vs 4,933 MT/s). The average motherboard supports overclocked RAM speed of 4,933 MT/s.
  • Slower M.2 slot interfaces
    ASUS Prime X399 A has slower M.2 slot interfaces than the average motherboard (1x PCIe 3.0x4/SATA, 1x PCIe 3.0x4 vs 1x PCIe 5.0x4, 2x PCIe 4.0x4). The average motherboard uses 1x PCIe 5.0x4, 2x PCIe 4.0x4 M.2 slot interfaces.
  • Fewer RAID options
    ASUS Prime X399 A has fewer RAID options than the average motherboard (0/1/10 vs 0/1/5/10). The average motherboard has 0/1/5/10 RAID level/s.
  • 1 fewer U.2 sockets
    ASUS Prime X399 A has fewer U.2 sockets than the average motherboard (1 vs 0). The average motherboard has 0 U.2 socket/s.
  • 1 fewer DisplayPort outputs
    ASUS Prime X399 A has fewer DisplayPort outputs than the average motherboard (0 vs 1). The average motherboard has 1 DisplayPort outputs.
  • 1 fewer PS/2 ports
    ASUS Prime X399 A has fewer PS/2 ports than the average motherboard (0 vs 1). The average motherboard has 1 PS/2 port/s.
  • 1 fewer HDMI outputs
    ASUS Prime X399 A has fewer HDMI outputs than the average motherboard (0 vs 1). The average motherboard has 1 HDMI outputs.
  • 2 fewer USB 2.0 ports
    ASUS Prime X399 A has fewer USB 2.0 ports than the average motherboard (0 vs 2). The average motherboard has 2 USB 2.0 port/s.
  • 60% lower LAN speed
    ASUS Prime X399 A 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.
  • No Wi-Fi connectivity
    ASUS Prime X399 A does not support Wi-Fi connectivity, while the average motherboard does. 50% of motherboards support Wi-Fi connectivity.
  • No Wi-Fi antenna included
    ASUS Prime X399 A 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
    ASUS Prime X399 A has fewer ARGB headers than the average motherboard (0 vs 2). The average motherboard has 2 ARGB header/s.
  • 61 mm wider
    ASUS Prime X399 A is wider than the average motherboard (305 mm vs 244 mm). The average motherboard width is 244 mm.
  • More basic motherboard chipset
    ASUS Prime X399 A has more basic motherboard chipset than the average motherboard (AMD X399 vs Intel B860). The average motherboard uses Intel B860 chipset.
    What it is: The chipset that defines the motherboard platform and many of its features.
    When it matters: When you compare platform features, connectivity, and CPU support.

    Importance: HIGH

    ASUS Prime X399 A has more basic motherboard chipset than the average motherboard (AMD X399 vs Intel B860). The average motherboard uses Intel B860 chipset.AMD X399 vs Intel B860
  • 60% lower LAN speed
    ASUS Prime X399 A 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.
    What it is: The maximum wired Ethernet speed supported by the motherboard.
    When it matters: When you want faster wired networking.

    Importance: HIGH

    Good value: 2.5GbE

    ASUS Prime X399 A 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.1 Gbps vs 2.5 Gbps
  • Slower M.2 slot interfaces
    ASUS Prime X399 A has slower M.2 slot interfaces than the average motherboard (1x PCIe 3.0x4/SATA, 1x PCIe 3.0x4 vs 1x PCIe 5.0x4, 2x PCIe 4.0x4). The average motherboard uses 1x PCIe 5.0x4, 2x PCIe 4.0x4 M.2 slot interfaces.
    What it is: The storage or PCIe interface available for each M.2 slot on the motherboard.
    When it matters: When you want to check which drives each M.2 slot can use.

    Importance: MEDIUM

    ASUS Prime X399 A has slower M.2 slot interfaces than the average motherboard (1x PCIe 3.0x4/SATA, 1x PCIe 3.0x4 vs 1x PCIe 5.0x4, 2x PCIe 4.0x4). The average motherboard uses 1x PCIe 5.0x4, 2x PCIe 4.0x4 M.2 slot interfaces.1x PCIe 3x4/SATA, 1x PCIe 3x4 vs 1x PCIe 5x4, 2x PCIe 4x4
  • No Wi-Fi connectivity
    ASUS Prime X399 A does not support Wi-Fi connectivity, while the average motherboard does. 50% of motherboards support Wi-Fi connectivity.
    What it is: Shows whether the motherboard includes onboard Wi-Fi hardware instead of requiring a separate adapter.
    When it matters: When you want wireless networking without adding an extra card.

    Importance: LOW

    Good value: yes

    ASUS Prime X399 A does not support Wi-Fi connectivity, while the average motherboard does. 50% of motherboards support Wi-Fi connectivity.
  • No Wi-Fi antenna included
    ASUS Prime X399 A does not include a Wi-Fi antenna, while the average motherboard does. 51.1% of motherboards include a Wi-Fi antenna.
    What it is: Shows whether the external Wi-Fi antenna is included with the motherboard package.
    When it matters: When the board has Wi-Fi and you want it ready to use right away.

    Importance: LOW

    ASUS Prime X399 A does not include a Wi-Fi antenna, while the average motherboard does. 51.1% of motherboards include a Wi-Fi antenna.
  • No integrated graphics support
    ASUS Prime X399 A does not support integrated graphics, while the average motherboard does. 89.5% of motherboards support integrated graphics.
    What it is: Shows whether the motherboard can output video from CPUs that include integrated graphics.
    When it matters: When you want video output without installing a graphics card.

    Importance: LOW

    Good value: yes

    ASUS Prime X399 A does not support integrated graphics, while the average motherboard does. 89.5% of motherboards support integrated graphics.
  • Fewer RAID options
    ASUS Prime X399 A has fewer RAID options than the average motherboard (0/1/10 vs 0/1/5/10). The average motherboard has 0/1/5/10 RAID level/s.
    What it is: The RAID modes officially supported by the motherboard storage platform.
    When it matters: When you plan to use multiple drives in a RAID setup.

    Importance: LOW

    ASUS Prime X399 A has fewer RAID options than the average motherboard (0/1/10 vs 0/1/5/10). The average motherboard has 0/1/5/10 RAID level/s.0/1/10 vs 0/1/5/10
  • 2 fewer ARGB headers
    ASUS Prime X399 A has fewer ARGB headers than the average motherboard (0 vs 2). The average motherboard has 2 ARGB header/s.
    What it is: The number of 3-pin addressable RGB headers available on the motherboard.
    When it matters: When you want to connect more ARGB lighting devices.

    Importance: LOW

    Good value: >=2

    ASUS Prime X399 A has fewer ARGB headers than the average motherboard (0 vs 2). The average motherboard has 2 ARGB header/s.0 vs 2
Total
Overall
Platform & Features
Memory
Storage
Ports & USB
Network
Power & Cooling

Graphic comparison of ASUS Prime X399 A and other products in the Motherboards category

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Third-party reviews

United Kingdom
amazon
4.2
97 Reviews
amazon
3.8
38 Reviews
United States
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4.1
99 Reviews
Amazon_logo.png
4.0
38 Reviews

(Reviews last updated: May 2026)

What customers like about ASUS Prime X399 A?

  • Excellent layout with ample space between PCI-E slots for large GPUs
  • Strong audio quality (Crystal Sound 3) and easy-to-use UEFI BIOS
  • Comprehensive connectivity including dual M.2 slots and U.2 support
  • Solid build quality and reliable performance for workstation tasks
  • Helpful debugging features like on-board power buttons and Q-Code display
  • Effective cooling management with multiple fan headers and dedicated pump headers

What customers dislike about ASUS Prime X399 A?

  • No built-in Wi-Fi or Bluetooth adapters
  • Vague or poorly documented BIOS error codes can make troubleshooting difficult
  • Occasional reports of RAM compatibility issues or faulty memory slots
  • Audio crosstalk/bleed issues reported by some users when using headsets
  • Limited SATA ports (6x) compared to some other high-end X399 boards
  • Large EATX form factor may not fit comfortably in all standard ATX cases

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