Skip to content

ASUS · AM5 · B850

Pro WS B850M-ACE SE

Micro-ATX · DDR5 · 4 DIMMs · 8-phase VRM

Quality
64
VRM
32
Value
34
Amazon
$360
Pro WS B850M-ACE SE
View Pro WS B850M-ACE SE Gallery in high resolution
$360
Available Updated 3 days, 19 hours ago Prime FBA
Overall64.0
VRM32.0
Chipset94.0
Expansion / storage82.0
Connectivity72.0
Audio40.0
Quality / price33.8
$360 on Amazon Motherboard table Compare this motherboard

Build with this motherboardSelect a CPU first so the Builder can confirm the socket and unlock this board. Choose the CPU first

Written analysis

Pro WS B850M-ACE SE at a glance

The Pro WS B850M-ACE SE uses the Micro-ATX form factor, AM5 socket, and AMD B850 Chipset chipset. This is a balanced mainstream platform: enough expansion and connectivity for a performance PC without paying only for flagship extras.

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.

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

Power delivery

The calculated VRM score is 32.0, placing the power delivery in the entry-level class. The board lists 8 CPU power phases, 80 A power stages in a 8 + 2 + 1 layout. CPU power input is listed as 2. It is best paired with mainstream 65–105 W-class processors and good case airflow.

Expansion and storage

The expansion and storage score is 82.0: well equipped . The platform supports PCIe 5.0. Physical expansion includes 3 ×16 slots.

On-board storage consists of 2 M.2 slots supporting M.2_1: PCIe5.0x4/PCIe4.0x4; M.2_2: PCIe5.0x4/PCIe4.0x4,x2; MCIO: PCIe5.0x4/PCIe4.0x4,x2; U.2: PCIe3.0x4 and 4 SATA ports. Supported M.2 lengths are listed as 2280. The two-slot layout covers a typical OS-and-games or OS-and-project-drive setup.

Connectivity and rear I/O

The connectivity score is 72.0, rated strong . There is no recorded onboard Wi-Fi ; wired networking is 1 x Realtek 10Gb Ethernet1 x Intel® 2.5Gb Ethernet1 x Realtek 1Gb Ethernet*ASUS LANGuard* This dedicated LAN port is for BMC and IPMI connections only; internet access is not supported. at up to 10000 Mbps. The recorded USB provision is 7 rear connections and 1 front-panel connections. 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 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 2 analogue jacks.

Buying verdict

Overall quality is 64.00, a mainstream result. The essential platform features are covered, while premium I/O and tuning extras are more selective.

At the recorded Amazon price, the quality-to-price score is 33.8. The nearby-board comparison below may reveal a better-equipped option at a similar price.

Board data

Full specifications

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

General

Manufacturer
ASUS
Motherboard
Pro WS B850M-ACE SE
Chipset / socket
AMD B850 Chipset / AM5
Form factor
Micro-ATX
Launch price
—
Amazon price
$360
Availability
In stock
Price updated
3 days, 19 hours ago

VRM

CPU phases
8 (80 A)
Power design
8 + 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
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
2
M.2 lengths
2280
M.2 modes
M.2_1: PCIe5.0x4/PCIe4.0x4; M.2_2: PCIe5.0x4/PCIe4.0x4,x2; MCIO: PCIe5.0x4/PCIe4.0x4,x2; U.2: PCIe3.0x4
SATA ports
4

Display outputs

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

USB

Rear USB 2.0
2
Rear USB 3.2 Gen 2 Type-A 10 Gbps
3
Rear USB 3.2 Gen 2 Type-C 10 Gbps
2
Front USB 3.2 Gen 2×2 Type-C 20 Gbps
1
Front USB-C PD
15 W
Header USB 2.0
4
Header USB 3.2 Gen 1 Type-A 5 Gbps
2

Networking

Ethernet
1 x Realtek 10Gb Ethernet1 x Intel® 2.5Gb Ethernet1 x Realtek 1Gb Ethernet*ASUS LANGuard* This dedicated LAN port is for BMC and IPMI connections only; internet access is not supported.
LAN ports
3
LAN speed
10000 Mbps
Wi-Fi
Not included
Bluetooth
No

Audio

Chipset
Realtek 7.1 Surround Sound High Definition Audio CODEC*
Analog jacks
2
Gold-plated jacks
No
Optical S/PDIF
No
Spatial audio
No

Buttons

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

Additional information

CPU support
AMD Socket AM5 for AMD Ryzen™ 9000 & 8000 & 7000 Series Desktop Processors and AMD EPYC™ 4005 Series Processors* * Refer to https://www.asus.com/support/download-center/ for CPU support list.
OS support
Windows 11, Windows 10 64-bit (with AMD Ryzen™ Desktop Processors)
Memory notes
Supports DDR5 ECC and Non‑ECC unbuffered DIMMs. AMD EXPO (Extended Profiles for Overclocking) supported. Actual supported memory types, speeds and module counts depend on CPU and memory configuration — refer to the CPU/Memory Support list on the product support site. Non‑ECC unbuffered DDR5 memory supports On‑Die ECC function. Speeds and compatibility may be adjusted based on mass‑produced memory products available on the market.
Display notes
Also includes 1 x VGA port provided by the AST2600 (analog BMC-sourced output). USB Type-C port is USB 10Gbps and supports DisplayPort video output (DP 1.4 capability noted). Graphics capabilities may vary by CPU — refer to AMD CPU specifications for onboard GPU support. Resolutions: DisplayPort/Type-C (DP 1.4) up to 8K@30Hz; HDMI (HDMI 2.1) up to 4K@60Hz.
Expansion notes
Maximum supported generation: PCIe 5.0 (one physical x16 slot is PCIe 5.0 when paired with Ryzen 9000/7000 series or EPYC 4005). PCIe 5.0 provides roughly double the per-lane bandwidth of PCIe 4.0 (~32 GT/s raw per lane; ~63 GB/s aggregate for an x16 link), and is backward compatible with previous PCIe versions. Notes: there are three physical x16 slots total — one is PCIe 5.0 x16 (supports x16 mode with specific CPUs), one is PCIe 4.0 x16 (CPU-dependent; supports x8/x4 modes with some CPUs), and one is a chipset-provided PCIe 4.0 x16 wired for x4 mode. Slot generation and available lanes/modes vary by CPU type and chipset; consult the ASUS PCIe bifurcation table and CPU-specific specifications for exact lane bifurcation, shared bandwidth, and device compatibility. Specifications may change based on CPU installed; see the support/download pages for supported peripherals.
M.2_1
PCIe 5.0 x4 (Ryzen 9000/7000/EPYC 4005); PCIe 4.0 x4 (Ryzen 8000) 4 · 2280 · From CPU — Functionality varies by CPU: PCIe5.0 x4 with Ryzen 9000/7000/EPYC 4005; PCIe4.0 x4 with Ryzen 8000.
M.2_2
PCIe 5.0 x4 (Ryzen 9000/7000/EPYC 4005); PCIe 4.0 x4/x2 (Ryzen 8000) 4 · 2280 · From CPU — Shares bandwidth with MCIO connector; when MCIO is operating M.2_2 is disabled. Functionality also varies by CPU (see supported_pcie_version).
Storage notes
Total: 2x M.2 (both 2280), 1x MCIO (shares bandwidth with M.2_2), 1x U.2 (PCIe3.0 x4 via SFF-8643 adapter, cable sold separately), 4x SATA 6Gb/s. U.2 shares bandwidth with SATA ports; enabling U.2 in BIOS disables SATA ports. Specifications and PCIe modes vary by CPU type.
USB notes
Primary USB summary: Rear — 5 x 10Gbps (3 Type-A, 2 Type-C) and 2 x USB 2.0 Type-A. Front — 1 x 20Gbps Type-C (USB 3.2 Gen2x2), 1 x 5Gbps header supporting 2 additional 5Gbps ports, and 2 x USB 2.0 headers supporting 4 additional USB2 ports. Onboard — 1 x USB 2.0 Type-A for BIOS FlashBack. USB Type-C PD (front) rated max 5V/3A (15W). Note: Internal/back-panel entries (including an internal Thunderbolt/USB4 header and internal USB 20Gbps connector) were present in the provided context but were not counted in the primary USB port tallies per instructions.
Audio notes
Supports jack-detection, multi-streaming, front panel jack-retasking; up to 24-Bit/192 kHz playback; audio shielding, premium audio capacitors, dedicated audio PCB layers. Note: Due to HDA bandwidth limitations, 32-Bit/192 kHz is not supported for 7.1 Surround Sound audio.
Networking notes
Ports: 1 x Realtek 10Gb Ethernet, 1 x Intel 2.5Gb Ethernet, 1 x Realtek 1Gb Ethernet (dedicated management LAN for AST2600). ASUS LANGuard mentioned. Dedicated LAN port for BMC/IPMI connections only (internet access not supported).
Button notes
Other front/board controls and headers: Start button, Reset button. Additional headers/features: Chassis Intrusion header, COM Port header, Front Panel Audio (F_AUDIO) header, SPI TPM header (14-1 pin), 10-1 pin Front Panel System header, RTC Battery header, Thermal Sensor header, Thunderbolt (USB4) header. Notes: multiple USB headers/ports and dedicated management LAN are present; no explicit Smart or Q-Flash Plus buttons listed.
Fan / RGB headers
1 CPU · 1 OPT · 1 AIO · 3 chassis · — ARGB · — RGB
Thermal sensors
1
Other headers
Front audio · System panel · TPM · Thunderbolt
Accessories
Cables 2 x SATA 6Gb/s cables Miscellaneous 1 x I/O shield 1 x Q-connector 1 x M.2 rubber package(s) Documentation 1 x ACC Express activation key card 1 x Quick start guide
Dimensions
micro-ATX Form Factor9.6 inch x 9.6 inch (24.4 cm x 24.4 cm)

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

Amazon

Price history

Nearby quality

Similar motherboards

Boards on AM5 close to Pro WS B850M-ACE SE on overall quality. Open the motherboard table to sort, filter, and compare side by side.

Compare these in the motherboard table

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

Comments on Pro WS B850M-ACE SE

No comments yet.

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 and AMD EPYC™ 4005 Series 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*
Supports up to 5600MT/s with AMD EPYC™ 4005 Series Processors, ECC and Non-ECC Un-buffered DIMM*
Dual channel memory architecture
Supports AMD Extended Profiles for Overclocking (EXPO™)
* 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/. Adjustments will be made based
on the specifications of mass-produced memory products available on the market.
* Non-ECC, un-buffered DDR5 memory supports
On-Die ECC function.

Graphics

1 x DisplayPort**
1 x VGA port from AST2600
1 x HDMI™ port***
1 x USB 10Gbps port (USB Type-C®) supports
DisplayPort video output**
* Graphics specifications may vary between CPU types. 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.

Expansion slots

AMD Ryzen™ 9000 & 7000 Series Desktop Processors and AMD EPYC™ 4005 Series 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 B850 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/download-center/ for the list of supported peripherals.

Storage

Total supports 2 x M.2 slots, 1 x MCIO connector, 1 x U.2 connector and 4 x SATA 6Gb/s ports
AMD Ryzen™ 9000 & 7000 Series Desktop Processors and AMD EPYC™ 4005 Series Processors
M.2_1 slot (Key M), type 2280 (supports PCIe 5.0 x4 mode)
M.2_2 slot (Key M), type 2280 (supports PCIe 5.0 x4 mode)
MCIO connector (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)
M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4/x2 mode)
MCIO connector (supports PCIe 4.0 x4/x2 mode)**
AMD B850 Chipset
U.2_1 connector supports PCIe 3.0 x4 mode via an SFF-8643 adapter cable. The cable is purchased separately.
4 x SATA 6Gb/s ports***
* Specifications vary by CPU types.
** MCIO connector shares bandwidth with M.2_2 slot. When MCIO connector is operating, M.2_2 slot will be disabled.
*** U.2 shares bandwidth with SATA ports; Enable U.2 in BIOS menu to support a NVMe storage device, and SATA ports will be disabled.

USB

Rear USB (Total 7 ports)
5 x USB 10Gbps port(s) (3 x Type-A + 2 x USB Type-C®)
2 x USB 2.0 port(s) (2 x Type-A)
Front USB (Total 7 ports)
1 x USB 20Gbps (supports USB Type-C®)
1 x USB 5Gbps header(s) support(s) 2 additional USB 5Gbps ports
2 x USB 2.0 header(s) support(s) 4 additional USB 2.0 ports
* USB Type-C® power delivery output: max. 5V/3A Onboard USB port(s)
1 x USB 2.0 port (1 x Type-A) for BIOS FlashBack™

Internal I/O

Fan and Cooling Related
1 x 4-pin CPU Fan header(s)
1 x 4-pin CPU OPT Fan header(s)
3 x 4-pin Chassis Fan header(s)
1 x W_PUMP+ header(s)
Power Related
1 x 24-pin Main Power connector
1 x 8-pin +12V CPU Power connector
1 x 4-pin +12V CPU Power connector
Storage Related
2 x M.2 slots (Key M)
4 x SATA 6Gb/s ports
1 x U.2 connector
1 x MCIO connector
USB
1 x USB 20Gbps connector (support(s) USB Type-C® )
1 x USB 5Gbps header(s) support(s) 2 additional USB 5Gbps ports
2 x USB 2.0 header(s) support(s) 4 additional USB 2.0 ports
1 x USB 2.0 port (1 x Type-A)
Miscellaneous
1 x BIOS FlashBack™ button
1 x Chassis Intrusion header
1 x COM Port header
1 x Reset button
1 x Front Panel Audio header (F_AUDIO)
1 x SPI TPM header (14-1 pin)
1 x Start button
1 x 10-1 pin Front Panel System header
1 x RTC Battery header
1 x Thermal Sensor header
1 x Thunderbolt™ (USB4®) header

Rear I/O

3 x USB 10Gbps port(s) (3 x Type-A)
1 x USB 10Gbps port(s) (USB Type-C®)
1 x USB 10Gbps port(s) (USB Type-C®) supports DisplayPort video output
2 x USB 2.0 port(s) (2 x Type-A)
1 x DisplayPort
1 x VGA port
1 x HDMI™ port
1 x Realtek 10Gb Ethernet port
1 x Intel® 2.5Gb Ethernet ports
1 x Realtek 1Gb Ethernet (Dedicated management LAN for AST2600)
2 x Audio jacks
1 x Clear CMOS 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
* Due to limitations in HDA bandwidth,
32-Bit/192 kHz is not supported for 7.1 Surround Sound audio.

Special features

ASUS 5X PROTECTION III
- DIGI+ VRM (- Digital power design with DrMOS)
- ESD Guards
- LANGuard
- Overvoltage protection
- SafeSlot
- Stainless-steel back I/O
ASUS Q-Design
- M.2 Q-Latch
- Q-Code
- Q-Connector
- Q-LED (CPU [red], DRAM [yellow], VGA [white], Boot Device [yellow green])
- Q-Slot
ASUS Thermal Solution
- M.2 heatsink
- Aluminum heatsink design
ASUS EZ DIY
- BIOS FlashBack™ button
- BIOS FlashBack™ LED
- Clear CMOS button
- Dual DIMM clips
- ProCool II
- SafeSlot
- SafeDIMM
Bespoke Motherboard Design & Business Focused Features
- 24/7 reliability
- Overcurrent protection

Accessories

Cables
2 x SATA 6Gb/s cables
Miscellaneous
1 x I/O shield
1 x Q-connector
1 x M.2 rubber package(s)
Documentation
1 x ACC Express activation key card
1 x Quick start guide

Privacy controls

Choose whether optional analytics may run. Necessary storage remains active because it supports security, login, requested preferences, and this choice.

Necessary Security, sessions, forms, and preferences you request.
Always active