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ASUS · AM5 · X870

PRIME X870-P-CSM

ATX · DDR5 · 4 DIMMs · 14-phase VRM

Quality
74
VRM
60
Value
56
Amazon
$250
PRIME X870-P-CSM
View PRIME X870-P-CSM Gallery in high resolution
$250
Available Updated 3 days, 22 hours ago Prime FBA
Overall73.6
VRM60.0
Chipset93.0
Expansion / storage107.0
Connectivity68.0
Audio40.0
Quality / price55.9
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Written analysis

PRIME X870-P-CSM at a glance

The PRIME X870-P-CSM uses the ATX form factor, AM5 socket, and AMD X870 Chipset 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. ECC modules are accepted, subject to CPU support.

Best fit: a performance gaming and productivity PC that needs a balanced board without workstation-class excess.

Power delivery

The calculated VRM score is 60.0, placing the power delivery in the upper mid-range class. The board lists 14 CPU power phases, 80 A power stages in a 14+2+1 layout. CPU power input is listed as 2. It suits performance processors at stock; sustained extreme overclocking is not its main purpose.

Expansion and storage

The expansion and storage score is 107.0: exceptionally well equipped . The platform supports PCIe 5.0. Physical expansion includes 4 ×16 slots.

On-board storage consists of 4 M.2 slots and 2 SATA ports. Supported M.2 lengths are listed as 2242, 2260, 2280. 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 68.0, rated adequate . There is no recorded onboard Wi-Fi ; wired networking is 1 x Realtek 2.5Gb EthernetASUS LANGuard at up to 2500 Mbps. The recorded USB provision is 10 rear connections and 1 front-panel connections. 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, USB-C DisplayPort. These motherboard outputs require a processor with integrated graphics.

Audio

The audio score is 40.0. This is a standard onboard solution using Realtek 7.1 Surround Sound High Definition Audio CODEC. It covers normal gaming and communication; demanding headphones or production work still benefit from an external interface. The rear panel has 3 analogue jacks.

Buying verdict

Overall quality is 73.60, a strong performance-class result. This is the practical sweet spot for a powerful gaming or productivity PC without paying for every flagship extra.

At the recorded Amazon price, the quality-to-price score is 55.9—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
PRIME X870-P-CSM
Chipset / socket
AMD X870 Chipset / AM5
Form factor
ATX
Launch price
—
Amazon price
$250
Availability
In stock
Price updated
3 days, 22 hours ago

VRM

CPU phases
14 (80 A)
Power design
14+2+1
EPS connector
2

Memory

Type / slots
DDR5 / 4 DIMMs
Max capacity / OC
256 GB / 8000 MT/s
Per DIMM
64 GB
XMP / EXPO
Not recorded
ECC
Modules supported

PCIe

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

Storage

M.2 slots
4
M.2 lengths
2242, 2260, 2280
SATA ports
2

Display outputs

HDMI
Yes · 2.1 · 4K@60Hz
DisplayPort
No
USB-C DisplayPort
Yes · 1.4a · 4K@60Hz

USB

Rear USB 2.0
4
Rear USB 3.2 Gen 1 Type-A 5 Gbps
3
Rear USB 3.2 Gen 2 Type-A 10 Gbps
1
Rear USB4 Type-C
2
Front USB 3.2 Gen 2 Type-C 10 Gbps
1
Front USB-C PD
15 W
Header USB 2.0
4
Header USB 3.2 Gen 1 Type-A 5 Gbps
2
USB4
Type-C · rear

Networking

Ethernet
1 x Realtek 2.5Gb EthernetASUS LANGuard
LAN ports
2
LAN speed
2500 Mbps
Wi-Fi
Not included
Bluetooth
No

Audio

Chipset
Realtek 7.1 Surround Sound High Definition Audio CODEC
Analog jacks
3
Gold-plated jacks
No
Optical S/PDIF
No
Spatial audio
No

Buttons

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

Additional information

CPU support
AMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors* * Refer to https://www.asus.com/support/download-center/ for CPU support list.
OS support
Windows 11, Windows 10 64-bit
Memory notes
4 x un-buffered DIMM slots; supports ECC and Non-ECC modules (Non-ECC DDR5 supports On-Die ECC). Supports AMD EXPO and ASUS Enhanced Memory Profile (AEMP) for overclocking. OC speeds up to 8000+ MT/s when used with Ryzen 7000/8000/9000 series processors. Adjustments to supported modules, speeds, and module counts depend on mass-produced memory product specifications, CPU, and memory configuration. Refer to the product support/CPU & memory compatibility list for detailed, model-specific support.
Display notes
Rear I/O includes 1 x HDMI port and 2 x USB4 (40Gbps) Type-C ports that support DisplayPort over Type-C. Graphics specifications may vary by CPU model (refer to AMD CPU specs). VGA resolution support depends on the processor or discrete graphics card capabilities. HDMI support specified as 4K@60Hz per HDMI 2.1; DisplayPort over Type-C supports up to 4K@60Hz per DisplayPort 1.4a.
Expansion notes
Maximum PCIe generation: PCIe 5.0 (one physical PCIe 5.0 x16 slot). PCIe 5.0 offers roughly up to ~64 GB/s total bandwidth for an x16 slot and is backward compatible with earlier PCIe versions. Slot summary: 4 physical x16 slots total — 1x PCIe 5.0 x16 (Ryzen 9000/7000), 1x PCIe 4.0 x16 (Ryzen 8000, can operate at x8/x4 electrical modes), and 2x PCIe 4.0 x16 (X870 chipset). Note: PCIEX16(G4)_1 and PCIEX16(G4)_2 share bandwidth with M.2_3 and will be disabled when M.2_3 is active. Refer to the ASUS PCIe bifurcation table and the support pages for detailed lane-splitting/bifurcation and compatibility information.
M.2_1
PCIe 5.0 x4 (with Ryzen 9000 & 7000); PCIe 4.0 x4 (with Ryzen 8000) x4 · 2280 · From CPU — Performance/mode depends on CPU: Ryzen 9000 & 7000 => PCIe 5.0 x4; Ryzen 8000 => PCIe 4.0 x4.
M.2_2
PCIe 4.0 x4 x4 · 2242, 2260, 2280 · From Chipset
M.2_3
PCIe 4.0 x4 x4 · 2280 · From Chipset — Shares bandwidth with PCIEX16(G4)_1 and PCIEX16(G4)_2; those PCIEX16 slots will be disabled when M.2_3 is in use.
M.2_4
PCIe 3.0 x2 x2 · 2280 · From Chipset — Shares bandwidth with SATA6G_1 and SATA6G_2; M.2_4 will be disabled when either SATA6G_1 or SATA6G_2 is in use.
RAID
SATA (Ryzen 9000: RAID 0/1/5/10; Ryzen 8000: RAID 0/1; Ryzen 7000: RAID 0/1/10)
Storage notes
Board supports 4 M.2 slots and 2 SATA 6Gb/s ports. M.2_1 is CPU-attached and its PCIe generation depends on the CPU family (Ryzen 9000/7000 = PCIe5.0 x4; Ryzen 8000 = PCIe4.0 x4). M.2_2/3/4 are provided by the AMD X870 chipset. M.2_3 disables PCIEX16(G4)_1 and PCIEX16(G4)_2 when populated/active. M.2_4 shares bandwidth with SATA6G_1 and SATA6G_2 and will be disabled if either SATA port is used. AMD RAIDXpert2 technology provides RAID support as listed per CPU family.
USB notes
Rear includes 2x USB4 (40Gbps) Type-C ports. Rear also has 1x 10Gbps (Type-A), 3x 5Gbps (Type-A), and 4x USB2. Front has 1x 10Gbps Type-C connector and header(s) that support additional ports: one USB 5Gbps header providing 2 additional USB 5Gbps ports and two USB2.0 headers providing 4 additional USB2 ports. Front USB Type-C PD is rated 5V/3A (15W). Header counts reflect supported additional internal ports.
Audio notes
Supports jack-detection, multi-streaming, front panel jack-retasking; supports up to 24-Bit/192 kHz playback; audio shielding, premium audio capacitors, dedicated audio PCB layers; a chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.
Networking notes
ASUS LANGuard mentioned; two entries for Realtek 2.5Gb Ethernet (appears as two 2.5Gb ports). High-speed USB ports available that can serve networking adapters: 2 x USB4 (40Gbps, Type-C), 1 x USB 10Gbps (Type-A), 3 x USB 5Gbps (Type-A), 4 x USB 2.0 (Type-A).
Button notes
BIOS FlashBack button is present. There is a Clear CMOS header (not listed as a dedicated button). Miscellaneous headers: 3x Addressable Gen2 headers, COM port header, Front Panel Audio (F_AUDIO), S/PDIF Out, SPI TPM (14-1 pin), 10-1 pin System Panel header. Multiple USB/port details: 2x USB4 (40Gbps, Type-C), 1x USB 10Gbps (Type-A) plus 1x USB 10Gbps connector supporting Type-C, 3x USB 5Gbps ports and a header supporting 2 additional 5Gbps ports, 4x USB 2.0 ports and headers supporting 4 additional USB 2.0 ports. Also includes fan headers, power connectors, M.2 slots and SATA ports. No Smart Button or Q-Flash Plus button mentioned.
Fan / RGB headers
1 CPU · 1 OPT · 1 AIO · 4 chassis · 3 ARGB · — RGB
Other headers
Front audio · System panel · TPM
Accessories
Cables 2 x SATA 6Gb/s cables Miscellaneous 1 x M.2 rubber package 2 x Screw packages for M.2 SSD Documentation 1 x ACC Express Activation Key Card 1 x Quick start guide
Dimensions
ATX Form Factor12 inch x 9.6 inch ( 30.5 cm x 24.4 cm )

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

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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.

CPU support

AMD Socket AM5 for AMD Ryzen™
9000 & 8000 & 7000 Series Desktop Processors*
* Refer to https://www.asus.com/support/download-center/
for CPU support list.

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 DIMM*
Dual channel memory architecture
Supports AMD Extended Profiles for Overclocking (EXPO™
)
ASUS Enhanced Memory Profile (AEMP)
* Adjustments will be made based on the specifications of mass-produced memory products available on the market.
* 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/download-center/
.
* Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.

Graphics

1 x HDMI™
port**
2 x USB4®
(40Gbps) ports support USB Type-C®
display outputs***
* Graphics specifications may vary between CPU types. Please refer to AMD CPU specifications.
** 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
2 x PCIe 4.0 x16 slots (support x1 mode)***
* Please check the PCIe bifurcation table on the support site (
https://www.asus.com/support/FAQ/1037507/
).
** Specifications vary by CPU types.
*** PCIEX16(G4)_1 and PCIEX16(G4)_2 share bandwidth with M.2_3. PCIEX16(G4)_1 and PCIEX16(G4)_2 will be disabled when M.2_3 runs.
- To ensure compatibility of the device installed, please refer to https://www.asus.com/support/download-center/
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 2280 (supports PCIe 5.0 x4 mode)
AMD Ryzen™
8000 Series Desktop Processors
M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)
AMD X870 Chipset
M.2_2 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)
M.2_3 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode)*
M.2_4 slot (Key M), type 2280 (supports PCIe 3.0 x2 mode)**
2 x SATA 6Gb/s ports**
* PCIEX16(G4)_1 and PCIEX16(G4)_2 share bandwidth with M.2_3. PCIEX16(G4)_1 and PCIEX16(G4)_2 will be disabled when M.2_3 runs.
** M.2_4 shares bandwidth with SATA6G_1 and SATA6G_2. M.2_4 will be disabled when SATA6G_1 or SATA6G_2 runs.
AMD RAIDXpert2 Technology
Ryzen™
9000 Series Processors: RAID 0/1/5/10
Ryzen™
8000 Series Processors: RAID 0/1
Ryzen™
7000 Series Processors: RAID 0/1/10

USB

Rear USB (Total 10 ports)
2 x USB4®
(40Gbps) ports (2 x USB Type-C®
)
1 x USB 10Gbps port (1 x Type-A)
3 x USB 5Gbps ports (3 x Type-A)
4 x USB 2.0 ports (4 x Type-A)
Front USB (Total 7 ports)
1 x USB 10Gbps connector (supports USB Type-C®
)
1 x USB 5Gbps header supports 2 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

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
4 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 10Gbps connector (supports USB Type-C®
)
1 x USB 5Gbps header supports 2 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 Clear CMOS header
1 x COM Port header
1 x Front Panel Audio header (F_AUDIO)
1 x S/PDIF Out header
1 x SPI TPM header (14-1 pin)
1 x 10-1 pin System Panel header

Rear I/O

2 x USB4®
(40Gbps) ports (2 x USB Type-C®
)
1 x USB 10Gbps port (1 x Type-A)
3 x USB 5Gbps ports (3 x Type-A)
4 x USB 2.0 ports (4 x Type-A)
1 x HDMI™
port
1 x Realtek 2.5Gb Ethernet port
3 x Audio jacks
1 x BIOS FlashBack™
button

Audio

Realtek 7.1 Surround Sound High Definition Audio CODEC*
- Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking
- Supports up to 24-Bit/192 kHz playback
Audio Features
- Audio Shielding
- Premium audio capacitors
- Dedicated audio PCB layers
* A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.

Special features

ASUS 5X PROTECTION III
- DIGI+ VRM (- Digital power design with DrMOS)
- LANGuard
- Overvoltage protection
- SafeSlot
- Stainless-steel back I/O
ASUS Q-Design
- M.2 Q-Latch
- PCIe Slot Q-Release
- Q-Dashboard
- Q-DIMM
- Q-LED Core
- Q-Slot
ASUS Thermal Solution
- Flexible M.2 heatsink
- VRM heatsink design
ASUS EZ DIY
- BIOS FlashBack™
button
- BIOS FlashBack™
LED
- ProCool
- Pre-mounted I/O shield
- SafeSlot
Aura Sync
- Addressable Gen 2 headers

Accessories

Cables
2 x SATA 6Gb/s cables
Miscellaneous
1 x M.2 rubber package
2 x Screw packages for M.2 SSD
Documentation
1 x ACC Express Activation Key Card
1 x Quick start guide

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