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ASUS · AM5 · X870

ASUS ROG Strix X870-A

ATX · DDR5 · 4 DIMMs · 16-phase VRM · 7 (802.11be)

Quality
91
VRM
74
Value
63
Amazon
$275
ASUS ROG Strix X870-A
View ASUS ROG Strix X870-A Gallery in high resolution
$275
Available Updated 4 days, 9 hours ago Prime FBA
Overall91.2
VRM74.0
Chipset100.0
Expansion / storage97.0
Connectivity97.0
Audio88.0
Quality / price63.0
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Written analysis

ASUS ROG Strix X870-A at a glance

The ASUS ROG Strix X870-A uses the ATX form factor, AM5 socket, and X870-A chipset. This is a high-end platform with the feature headroom expected in an enthusiast gaming or productivity build.

Memory support is DDR5 across 4 DIMM slots, with up to 256 GB and rated overclocked speeds up to 8000 MT/s. The board can operate memory in ECC mode. XMP / EXPO memory-profile support is recorded for easier tuning.

Best fit: a premium gaming or creator build that will use the stronger VRM, storage, and I/O rather than simply needing a compatible socket.

Power delivery

The calculated VRM score is 74.0, placing the power delivery in the high-end class. The board lists 16 CPU power phases, 90 A power stages in a 16(90A)+ 2(90A)+ 2(80A) layout. CPU power input is listed as 2. It is a strong match for upper-tier processors at stock and leaves useful tuning headroom.

Expansion and storage

The expansion and storage score is 97.0: exceptionally well equipped . The platform supports PCIe 5.0. Physical expansion includes 3 ×16 slots.

On-board storage consists of 4 M.2 slots supporting PCIe 5.0 x4, PCIe 4.0 x4, PCIe 4.0 x2 and 2 SATA ports. Supported M.2 lengths are listed as 22110, 2280, 2260, 2242. That is enough NVMe capacity for a multi-drive gaming or creator setup without immediately relying on an add-in card.

Connectivity and rear I/O

The connectivity score is 97.0, rated premium . Wireless networking is Wi-Fi 7 (802.11be) ; wired networking is 1 x Intel® 2.5Gb Ethernet at up to 2500 Mbps. Bluetooth 5.4 is included. The recorded USB provision is 12 rear connections; a front-panel total is not recorded. USB4 Type-C is available at the rear. The specification sheet below separates every USB speed and connector type.

Display connectivity includes HDMI 2.1, DisplayPort 1.4, USB-C DisplayPort. These motherboard outputs require a processor with integrated graphics.

Audio

The audio score is 88.0. This is a high-end onboard implementation using ALC4080, suitable for good headsets, powered speakers, and everyday content work. The rear panel has 2 analogue jacks. Optical S/PDIF is present for digital audio equipment.

Buying verdict

Overall quality is 91.20, a premium result. It makes sense when the build will use its stronger VRM and richer connectivity; otherwise a lower-tier board may deliver the same CPU performance for less.

At the recorded Amazon price, the quality-to-price score is 63.0—a balanced value for its feature class.

Board data

Full specifications

Platform, expansion, storage, rear I/O, internal headers, networking, audio, and board controls in one sheet.

General

Manufacturer
ASUS
Motherboard
ASUS ROG Strix X870-A
Chipset / socket
X870-A / AM5
Form factor
ATX
Launch price
—
Amazon price
$275
Availability
In stock
Price updated
4 days, 9 hours ago

VRM

CPU phases
16 (90 A)
Power design
16(90A)+ 2(90A)+ 2(80A)
EPS connector
2

Memory

Type / slots
DDR5 / 4 DIMMs
Max capacity / OC
256 GB / 8000 MT/s
Per DIMM
64 GB
XMP / EXPO
Yes
ECC
Operates in ECC mode

PCIe

Supported version
PCIe 5.0
x16 physical
3
x16 Gen 5
1
x16 Gen 4
2

Storage

M.2 slots
4
M.2 lengths
22110, 2280, 2260, 2242
M.2 modes
PCIe 5.0 x4, PCIe 4.0 x4, PCIe 4.0 x2
SATA ports
2

Display outputs

HDMI
Yes · 2.1 · 4K@60Hz
DisplayPort
Yes · 1.4 · 8K@30Hz
USB-C DisplayPort
Yes · 1.4a · 4K@60Hz

USB

Rear USB 3.2 Gen 1 Type-A 5 Gbps
4
Rear USB 3.2 Gen 2 Type-A 10 Gbps
5
Rear USB 3.2 Gen 2 Type-C 10 Gbps
1
Rear USB4 Type-C
2
Rear USB-C PD
30 W
Header USB 2.0
4
Header USB 3.2 Gen 1 Type-A 5 Gbps
4
Header USB 3.2 Gen 2×2 Type-C 20 Gbps
1
USB4
Type-C · rear

Networking

Ethernet
1 x Intel® 2.5Gb Ethernet
LAN ports
1
LAN speed
2500 Mbps
Wi-Fi
7 (802.11be)
Wi-Fi bandwidth
160MHz
Bands
2.4/5/6GHz
Antenna connectors
2
Bluetooth
5.4

Audio

Chipset
ALC4080
Analog jacks
2
Gold-plated jacks
No
Optical S/PDIF
Yes
Spatial audio
No

Buttons

BIOS flashback
Yes
Clear CMOS
Yes
Q-Flash Plus
No
Smart button
No
Onboard start / reset
Start

Additional information

Memory notes
Supports AMD Extended Profiles for Overclocking (EXPO™) and ASUS Enhanced Memory Profile (AEMP). Memory is un-buffered. Supported memory types, data rate, and number of DRAM modules vary depending on the CPU and memory configuration. Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.
Display notes
Video output specifications depend on AMD CPU specifications. VGA resolution support depends on processors' or graphic cards' resolution.
Expansion notes
The primary slot is PCIe 5.0 x16 with AMD Ryzen 9000 & 7000 Series CPUs, but becomes a PCIe 4.0 x16 slot (running at x8/x4) with Ryzen 8000 Series CPUs. The chipset provides an additional PCIe 4.0 x16 slot that supports x4 mode. Specifications vary by CPU type and users should consult the PCIe bifurcation table on the ASUS support site.
M.2_1
5.0 4 · 2242, 2260, 2280 · CPU — Functionality depends on the installed CPU. Supports PCIe 5.0 x4 mode with AMD Ryzen 9000 & 7000 Series processors. Supports PCIe 4.0 x4/x2 mode with AMD Ryzen 8000 Series processors.
M.2_2
5.0 4 · 2280, 22110 · CPU — Shares bandwidth with PCIEX16(G5); when M.2_2 is occupied, PCIEX16(G5) runs at x8 mode. This slot is disabled when using AMD Ryzen 8000 Series Desktop Processors.
M.2_3
4.0 4 · 2280 · Chipset — Shares bandwidth with PCIEX16(G4). When M.2_3 is occupied, PCIEX16(G4) will be disabled.
M.2_4
4.0 4 · 2280 · Chipset
RAID
SATA / PCIe (['0', '1', '5', '10'])
Storage notes
AMD RAIDXpert2 Technology supports both PCIe and SATA RAID. RAID 5 is only supported by AMD Ryzen 9000 series CPUs.
USB notes
The two rear USB4 Type-C ports support DP Alt mode and provide up to 15W (5V/3A) power delivery. The rear USB 3.2 Gen 2 Type-C port supports up to 30W PD Fast-charge.
Audio notes
ROG SupremeFX 7.1 Surround Sound. Features Savitech SV3H712 AMP, SupremeFX Shielding Technology, and premium audio capacitors. Supports impedance sense for front and rear headphone outputs, jack-detection, multi-streaming, and front panel jack-retasking. Provides 120 dB SNR stereo playback output and 110 dB SNR recording input. Supports up to 32-Bit/384 kHz playback on the front panel. The LINE OUT port on the rear panel does not support spatial audio; use the front panel or a USB device for this feature.
Networking notes
Wi-Fi transfer rate up to 2.9Gbps. Wi-Fi features may vary depending on the operating system. For Windows 11, Wi-Fi 7 requires 24H2 or later for full functions; Windows 11 21H2/22H2/23H2 only support Wi-Fi 6E. For Windows 10, no driver is available. Wi-Fi 6GHz frequency band and bandwidth regulations may vary between countries. The Bluetooth version may vary.
Button notes
The text also lists an 'Alteration PCIe mode switch' and a 'Start button'.
Fan / RGB headers
1 CPU · 1 OPT · 1 AIO · 5 chassis · 3 ARGB · — RGB
Thermal sensors
1
Other headers
Front audio · System panel
Dimensions
30.5 cm x 24.4 cm

Extracted notes sit here. Official manufacturer copy is at the bottom of the page.

Amazon

Price history

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VRM fit

VRM-appropriate CPUs

AM5 processors whose TDP sits in this board’s VRM window. Socket match is required; chipset extras still matter on sTR5. This is a power-delivery filter, not a ranked CPU guide.

Open AM5 CPUs in the CPU table

Discussion

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Vendor copy

Official manufacturer data

Raw manufacturer text kept for reference. Structured specs above are extracted from this copy and are the source for scores and tables.

Memory

4 x DIMM slots, max. 256GB, DDR5
Supports up to 8000+MT/s(OC) with Ryzen™
9000 & 8000 & 7000 Series Processors, ECC and Non-ECC, Un-buffered
Memory*"
Dual channel memory architecture
Supports AMD Extended Profiles for
Overclocking (EXPO™)
ASUS Enhanced Memory Profile (AEMP)
* Supported memory types, data rate
(speed), and number of DRAM modules vary depending on the CPU and memory
configuration, for more information please refer to CPU/Memory Support list
under the Support tab of product information site or visit
https://www.asus.com/support/.
* Non-ECC, un-buffered DDR5 memory supports
On-Die ECC function.

Graphics

1 x DisplayPort**
1 x HDMI™ port***  
2 x USB4® (40Gbps) ports support USB
Type-C® display outputs****
* Please refer to AMD CPU specifications.
** Supports max. 8K@30Hz as specified in
DisplayPort 1.4.
*** Supports 4K@60Hz as specified in HDMI
2.1.  
****Supports max. 4K@60Hz as specified in
DisplayPort 1.4a
**** VGA resolution support depends on
processors' or graphic cards' resolution.

Expansion slots

AMD Ryzen™ 9000 & 7000 Series Desktop Processors*
1 x PCIe 5.0 x16 slot (supports x16 mode)
AMD Ryzen™ 8000 Series Desktop Processors*
1 x PCIe 4.0 x16 slot (supports x8/x4 mode)**
AMD X870 Chipset
1 x PCIe 4.0 x16 slot (supports x4 mode)
* Please check the PCIe bifurcation table on the support site (https://www.asus.com/support/FAQ/1037507/).
** Specifications vary by CPU types.
- To ensure compatibility of the device installed, please refer to https://www.asus.com/support/ for the list of supported peripherals.

Storage

Supports 4 x M.2 slots and 2 x SATA 6Gb/s ports*
AMD Ryzen™ 9000 & 7000 Series Desktop Processors*
M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 5.0 x4 mode)
M.2_2 slot (Key M), type 2280/22110 (supports PCIe 5.0 x4 mode)**
AMD Ryzen™ 8000 Series Desktop Processors**
M.2_1 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4/x2 mode)
M.2_2 slot (Key M), type 2280/22110 (Not supports)****
AMD X870 Chipset
M.2_3 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)***
M.2_4 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
2 x SATA 6Gb/s ports
* AMD RAIDXpert2 Technology supports both PCIe RAID 0/1/5/10 and SATA RAID 0/1. RAID 5 Function is only supported by AMD Ryzen™ 9000 series CPU.
** M.2_2 shares bandwidth with PCIEX16(G5). When M.2_2 is occupied with SSD device, PCIEX16(G5) will run x8 only.
*** M.2_3 shares bandwidth with PCIEX16(G4). When M.2_3 is occupied with SSD device, PCIEX16(G4) will be disabled.
**** M.2_2 will be disabled when using AMD Ryzen™ 8000 Series Desktop Processors.

USB

Rear USB (Total 12 ports)
2 x USB4® (40Gbps) ports(2 x USB Type-C® with DP Alt mode)*
6 x USB 10Gbps ports (5 x Type-A + 1 x USB Type-C® with up to 30W PD Fast-charge)**
4 x USB 5Gbps ports (4 x Type-A)
Front USB (Total 9 ports)
1 x USB 20Gbps connector (supports USB Type-C®)
2 x USB 5Gbps headers support 4 additional USB 5Gbps ports
2 x USB 2.0 headers support 4 additional USB 2.0 ports
* USB Type-C® power delivery output: max. 5V/3A
** USB Type-C® power delivery output: 5V/9V max. 3A, 12V max 2.5A, 15V max. 2.0A

Internal I/O

Fan and Cooling Related
1 x 4-pin CPU Fan header
1 x 4-pin CPU OPT Fan header
1 x 4-pin AIO Pump header
5 x 4-pin Chassis Fan headers
Power Related
1 x 24-pin Main Power connector
2 x 8-pin +12V CPU Power connectors
Storage Related
4 x M.2 slots (Key M)
2 x SATA 6Gb/s ports
USB
1 x USB 20Gbps connector (supports USB Type-C®)
2 x USB 5Gbps headers support 4 additional USB 5Gbps ports
2 x USB 2.0 headers support 4 additional USB 2.0 ports
Miscellaneous
3 x Addressable Gen 2 headers
1 x Alteration PCIe mode switch
1 x Chassis Intrusion header
1 x CPU Over voltage jumper
1 x Front Panel Audio header (F_AUDIO)
1 x Start button
1 x 10-1 pin System Panel header
1 x Thermal Sensor header

Rear I/O

2 x USB4® (40Gbps) ports (2 x USB Type-C® with DP Alt mode)
6 x USB 10Gbps ports (5 x Type-A + 1 x USB Type-C® with up to 30W PD Fast-charge)**
4 x USB 5Gbps ports (4 x Type-A)
1 x DisplayPort
1 x HDMI™ port
1 x Wi-Fi module
1 x Intel® 2.5Gb Ethernet
2 x Audio jacks 
1 x Optical S/PDIF out port
1 x BIOS FlashBack™ button 
1 x Clear CMOS button

Wireless

Wi-Fi 7*
2x2 Wi-Fi 7 (802.11be)
Supports 2.4/5/6GHz frequency band**
Supports Wi-Fi 7 160MHz bandwidth, up to 2.9Gbps transfer rate.
Bluetooth® v5.4***
*Wi-Fi features may vary depending on the operating system
For Windows 11, Wi-Fi 7 will require  24H2 or later version for full functions, Windows 11 21H2/22H2/23H2 only support Wi-Fi 6E.
For Windows 10, please note that no driver is available , please refer to the Wi-Fi chipset vendor's website for details.
** Wi-Fi 6GHz frequency band and bandwidth regulatory may vary between countries.
*** The Bluetooth® version may vary, please refer to the Wi-Fi module manufacturer's website for the latest specifications.

Audio

ROG SupremeFX 7.1 Surround Sound High Definition Audio CODEC ALC4080*
- Impedance sense for front and rear headphone outputs
- Supports: Jack-detection, Multi-streaming, Front Panel MIC Jack-retasking
- High quality 120 dB SNR stereo playback output and 110 dB SNR recording input
- Supports up to 32-Bit/384 kHz playback on front panel"
Audio Features
- SupremeFX Shielding Technology
- Savitech SV3H712 AMP  
- Rear optical S/PDIF out port
- Premium audio capacitors
- Audio cover
* The LINE OUT port on the rear panel does not support spatial audio. If you wish to use spatial audio, make sure to connect your audio output device to the audio jack on the front panel of your chassis or use a USB interface audio device.

Special features

Extreme Engine Digi+
- 5K Black metallic capacitors
ASUS Q-Design
- M.2 Q-Latch
- M.2 Q-Release
- M.2 Q-Slide
- PCIe Slot Q-Release Slim (with PCIe SafeSlot)
- Q-Antenna
- Q-Dashboard
- Q-DIMM
- Q-LED (CPU [red], DRAM [yellow], VGA [white], Boot Device [yellow green])
- Q-Slot
ASUS Thermal Solution
- M.2 heatsink backplate
- M.2 heatsink
ASUS EZ DIY
- BIOS FlashBack™ button
- BIOS FlashBack™ LED
- Clear CMOS button
- ProCool II
- Pre-mounted I/O shield
- SafeSlot
- SafeDIMM
Aura Sync
- Addressable Gen 2 headers

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