Asus
Asus Prime B850M-A WIFI-CSM Gaming Desktop Motherboard - AMD B850 Chipset - Socket AM5 - Micro ATX (299316)
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- SKU:
- 21221678
- MPN:
- 299316
- Availability:
- Usually ships the same or next business day. In stock at our CA, IL, NJ warehouses.
- Shipping:
- Calculated at Checkout
- Stock Update:
- 12/09/2025 04:59:36 PM PST
Bulk discount rates
Below are the available bulk discount rates for each individual item when you purchase a certain amount
| Buy 2 - 3 | and pay only $191.41 each 191.41 |
| Buy 4 or above | and pay only $188.06 each 188.06 |
- Stock Update:
- 12/09/2025 04:59:36 PM PST
Description
This item is brand-new, factory sealed.
PRIME B850M-A WIFI-CSMASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen 9000 series processors. The PRIME B850M-A WIFI-CSM motherboard provides users and PC DIY builders with a range of performance optimizations via intuitive software and firmware features. Its designed to be Advanced AI PC-ready, offering the power and connectivity needed for demanding AI applications.
Performance
AI Solutions
ASUS AI Solutions include AI Cache Boost to supercharge large language model (LLM) workflows, ASUS AI Advisor as your technical expert with expertise in PC performance.
AI Cache Boost
Supercharge your large language model (LLM) workflows with AI Cache Boost. Exclusive to ASUS AMD 800 and 600 series motherboards that use Ryzen 9000 Series CPUs, this BIOS setting optimizes CPU cache and memory pathways to deliver up to 29% faster local LLM performance with high-speed memory tuning.
AI Advisor
ASUS AI Advisor allows users to explore the functionality and advanced features of ASUS motherboards in a simple and straightforward way. note1
Performance
Digital Power Design
PRIME B850M-A WIFI-CSM features an 8+2+1 phase power design with discrete MOSFETs, ensuring efficient and stable power delivery for AMD processors plus steady performance for day-to-day use.
Notes
1. Availability of ASUS AI Advisor may vary by region.
AI Advisor functions may vary by platform.CPU
AMD Socket AM5 for AMD RyzenTM 9000 and 8000 and 7000 Series Desktop Processorsnote
Note: Refer to https://www.asus.com/support/download-center/ for CPU support list.Chipset
AMD B850 ChipsetMemory
4 x DIMM slots, max. 256GB, DDR5 Supports up to 8000+MT/s (OC) with RyzenTM 9000 and 8000 and 7000 Series Processors, ECC and Non-ECC Un-buffered DIMMnote
Dual channel memory architecture
Supports AMD Extended Profiles for Overclocking (EXPOTM)
ASUS Enhanced Memory Profile (AEMP)
Note: 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.
Note: Non-ECC, un-buffered DDR5 memory supports On-Die ECC function.Graphics
2 x DisplayPortnote2
1 x HDMITM portnote3
Note1: Graphics specifications may vary between CPU types. Please refer to AMD CPU specifications.
Note2: Supports max. 8K at 30Hz as specified in DisplayPort 1.4.
Notw3: Supports 4K at 60Hz as specified in HDMI 2.1.Expansion Slots
AMD RyzenTM 9000 and 7000 Series Desktop Processorsnote1
1 x PCIe 5.0 x16 slot (supports x16 mode)
AMD RyzenTM 8000 Series Desktop Processors
1 x PCIe 4.0 x16 slot (supports x8/x4 mode) note2
AMD B850 Chipset
1 x PCIe 4.0 x16 slot (supports x1 mode)
Note1: Please check the PCIe bifurcation table on the support site (https://www.asus.com/support/FAQ/1037507/).
Note2: 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 supportedStorage
Supports 3 x M.2 slots and 4 x SATA 6Gb/s ports
AMD RyzenTM 9000 and 7000 Series Desktop 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 4.0 x4 mode)
AMD RyzenTM 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) note
AMD B850 Chipset
M.2_3 slot (Key M), type 2242/2260/2280 (supports PCIe 4.0 x4 mode)
4 x SATA 6Gb/s ports
Note: Specifications vary by CPU types.
AMD RAIDXpert2 Technology
RyzenTM 9000 Series Processors: RAID 0/1/5/10
RyzenTM 8000 Series Processors: RAID 0/1
RyzenTM 7000 Series Processors: RAID 0/1/10Ethernet
1 x Realtek 2.5Gb Ethernet
ASUS LANGuardWireless and Bluetooth
"Wi-Fi 6E
2x2 Wi-Fi 6E (802.11ax)
Supports 2.4/5/6GHz frequency bandnote1
Bluetooth v5.3note2
Note1: WiFi 6E 6GHz regulatory may vary between countries, supported only in Windows 11 or later.
Note2: The Bluetooth version may vary, please refer to the Wi-Fi module manufacturers website for the latest specifications."USB
Rear USB (Total 8 ports)
2 x USB 10Gbps ports (2 x Type-A )
2 x USB 5Gbps ports (2 x Type-A)
4 x USB 2.0 ports (4 x Type-A)
Front USB (Total 7 ports)
1 x USB 5Gbps 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
Note: USB Type-C power delivery output: max. 5V/3AAudio
Realtek 7.1 Surround Sound High Definition Audio CODECnote
- 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
Note: A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output.Back Panel I/O Ports
2 x USB 10Gbps ports (2 x Type-A)
2 x USB 5Gbps ports (2 x Type-A)
4 x USB 2.0 ports (4 x Type-A)
2 x DisplayPort
1 x HDMITM port
1 x Wi-Fi module
1 x Realtek 2.5Gb Ethernet port
3 x Audio jacks
1 x BIOS FlashBackTM buttonInternal I/O Connectors
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
3 x 4-pin Chassis Fan headers
Power Related
1 x 24-pin Main Power connector
1 x 8-pin +12V CPU Power connectors
1 x 4-pin +12V CPU Power connectors
Storage Related
3 x M.2 slots (Key M)
4 x SATA 6Gb/s ports
USB
1 x USB 5Gbps 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 RGB Gen 2 headers
1 x Clear CMOS header
1 x Chassis Intrusion 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 headerSpecial Features
ASUS 5X PROTECTION III
- DIGI+ VRM
- LANGuard
- Overvoltage protection
- SafeSlot
- Stainless-steel back I/O
ASUS Q-Design
- Q-Antenna
- Q-Dashboard
- Q-DIMM
- Q-LED Core
- Q-Slot
ASUS Thermal Solution
- M.2 heatsink
- VRM heatsink design
ASUS EZ DIY
- BIOS FlashBackTM button
- BIOS FlashBackTM LED
- Pre-mounted I/O shield
- SafeSlot
Aura Sync
- Addressable RGB Gen 2 headersSoftware Features
ASUS Exclusive Software
Armoury Crate
- Aura Creator
- Aura Sync
- Fan Xpert 2+
ASUS AI Advisor
ASUS Driver Hub
ASUS GlideX
TurboV Core
ASUS CPU-Z
Norton 360 Deluxe (60 Days Free Trial)
WinRAR (40 Days Free Trial)
UEFI BIOS
ASUS EZ DIY
- ASUS CrashFree BIOS 3
- ASUS EZ Flash 3
- ASUS UEFI BIOS EZ Mode
- ASUS MyHotkeyBIOS
256 Mb Flash ROM, UEFI AMI BIOSManageability
WOL by PME, PXEAccessories
Cables
2 x SATA 6Gb/s cables
Miscellaneous
1 x ASUS WiFi Q-Antenna
1 x M.2 rubber package
2 x Screw packages for M.2 SSD
Documentation
1 x Quick start guide
1 x ACC Express activation key cardOperating System
Windows 11, Windows 10 64-bitForm Factor
mATX Form Factor
9.6 inch x 9.6 inch (24.4 cm x 24.4 cm)Item Dimension (L inchxW inchxH inch)
11 x 11 x 3
Weight
3.00lb
Warranty Information
3 Years
Features
Brand Compatibility:
AMD
AMD
Specs
| Physical Characteristics | |
| Form Factor | Micro ATX |
| Width | 9.6" |
| Depth | 9.6" |
| I/O Expansions | |
| Total Number of Expansion Slots | 3 |
| PCI Express Standard |
|
| Number of PCI Express x16 Slots | 3 |
| Total Number of PCI Express Slots | 3 |
| Memory | |
| Memory Technology | DDR5 SDRAM |
| Number of Memory Slots | 4 |
| Memory Speed Supported | 8000 MHz |
| Memory Form Factor |
|
| Maximum Memory Supported | 256 GB |
| Error Checking | ECC |
| General Information | |
| Brand Name | Asus |
| Manufacturer Website Address | http://usa.asus.com |
| Marketing Information | ASUS Prime series motherboards are expertly engineered to unleash the full potential of AMD Ryzen 9000 series processors. The PRIME B850M-A WIFI-CSM motherboard provides users and PC DIY builders with a range of performance optimizations via intuitive software and firmware features. It's designed to be Advanced AI PC-ready, offering the power and connectivity needed for demanding AI applications. ASUS Corporate Stable Model ASUS Corporate Stable Model (CSM) is a commercial program designed to provide stable and reliable motherboards. Offering up to 36-month product lifecycle support and 6-month end-of-life notice to allow sufficient lead times for your organization to get ready for product transitions. Each purchase of an ASUS CSM motherboard comes with ASUS Control Center Express - server-grade IT management software. ASUS Control Center Express ASUS Control Center Express is an integrated IT monitoring and management software designed to deploy faster, simplify IT operations and improve productivity with comprehensive control and user-friendly functions. ASUS Control Center Express is compatible with over 100 ASUS motherboards to provide a high-quality, TCO-optimized solution for your business needs. Optimize IT endpoint management Designed to assist IT staff in monitoring and controlling devices within their corporate networks, and facilitate inventory checking in multiple locations remotely. Automate IT maintenance Allows IT staff to schedule automatic updates of the latest BIOS, software and utilities to specific or all devices at off-peak times, enhancing system stability and IT operational flexibility. Securely manage all of endpoints Securely manage endpoint configuration, portable storage access and PC software applications by enabling them to create grouping rules on individual devices. Performance AI Solutions ASUS AI Solutions include AI Advisor as your technical expert with expertise in PC performance. AI Advisor ASUS AI Advisor allows users to explore the functionality and advanced features of ASUS motherboards in a simple and straightforward way. Performance Digital Power Design PRIME B850M-A WIFI-CSM features an 8+2+1 phase power design with discrete MOSFETs, ensuring efficient and stable power delivery for AMD processors plus steady performance for day-to-day use. Enhanced Memory & Storage Performance Enhanced DDR5 performance Comprehensive memory tuning options are the cornerstone of PRIME motherboards. The PRIME B850M-A WIFI-CSM maximizes the potential of your DDR5 modules, from entry-level to extreme-speed kits. For entry-level modules without EXPO support,ASUS Enhanced Memory Profile (AEMP)automatically detects memory chips and provides optimized profiles for enhanced performance. For those looking to surpass stock DDR5 speeds, the PRIME B850M-A WIFI-CSM offers extensiveAMD Extended Profiles for Overclocking (EXPO ™ )support and a wide array of UEFI settings for further performance tweaks. Three M.2 slots (up to 128 Gbps) PRIME B850M-A WIFI-CSM offers a total of three M.2 slots, including one that supports data-transfer speeds of up to 128 Gbps via PCIe 5.0, and two that support PCIe 4.0. This enables quicker boot-up and app load times with OS or application drives. |
| Product Type | Gaming Desktop Motherboard |
| Product Name | PRIME B850M-A WIFI-CSM Gaming Desktop Motherboard |
| Manufacturer | ASUS Computer International |
| Manufacturer Part Number | PRIME B850M-A WIFI-CSM |
| Product Model | B850M-A WIFI-CSM |
| Product Line | Prime |
| Processor & Chipset | |
| Chipset Manufacturer | AMD |
| Processor Supported |
|
| Total Processor Supported | 1 |
| Processor Socket | Socket AM5 |
| Chipset Model | B850 |
| Technical Information | |
| AI-powered | Yes |
| Onboard Interfaces | |
| Number of SATA Interfaces | 4 |
| Total Number of Onboard USB Ports | 7 |
| Number of M.2 Interfaces | 3 |
| Onboard S/PDIF Header | Yes |
| Number of Onboard USB 2.0 Ports | 4 |
| Interfaces/Ports | |
| S/PDIF | Yes |
| HDMI Version | <li>2.1</li> |
| DisplayPort | Yes |
| HDMI | Yes |
| Number of USB 2.0 Ports | 4 |
| Total Number of USB Ports | 8 |
| I/O Controller | |
| RAID Supported | Yes |
| Controller Type | Serial ATA/600 |
| RAID Levels |
|
| Video | |
| Onboard Video | CPU Dependent Video |
| Network & Communication | |
| Wireless LAN | Yes |
| Wireless LAN Standard | IEEE 802.11ax |
| Bluetooth | Yes |
| Bluetooth Standard | Bluetooth 5.3 |
| 2.5Gigabit Ethernet | Yes |
| Gigabit Ethernet | Yes |
| Audio | |
| Audio Channels | 7.1 |
Warranty Information
All Items are Brand New, Factory Sealed and come with a standard warranty. [Read our policies]
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Asus Prime B850M-A WIFI-CSM Gaming Desktop Motherboard - AMD B850 Chipset - Socket AM5 - Micro ATX (299316)
$197.39