ASUS PRIME B850M-A WIFI-CSM, Motherboard, micro ATX, Socket AM5, AMD B850 Chipset, USB 3.2 Gen 2, USB 3.2 Gen 1, USB-C 3.2 Gen 1, Wi-Fi 6E, Bluetooth, 2.5 Gigabit LAN, onboard graphics (CPU required), HD Audio (8-channel), ASUS Corporate Stable Model (CSM)
$366.81 inc GST
✓ In Stock - 30 available
✓ Free NZ Delivery
30 in stock
- Allow 1–2 days for delivery to the North Island
- Allow 2–3 days for delivery to the South Island
- Add 1–2 days if you are rural
- Collection can be arranged

Description
Experience seamless connectivity and performance with the ASUS PRIME B850M-A WIFI-CSM motherboard. Designed for gamers and creators, this micro ATX motherboard supports Ryzen 7000/8000/9000 Series processors, allowing for extreme processing power. The board is equipped with DDR5 SDRAM technology, providing memory speeds up to 8000 MT/s (O.C.), ensuring smooth multitasking and enhanced gaming experiences. Its versatile expansion options include multiple M.2 slots and a variety of USB ports, catering to all your storage and peripheral needs. The integrated high definition audio ensures an immersive sound experience, while features like ASUS Q-Design and ASUS Aura Sync enhance functionality and aesthetics. With robust networking capabilities including 2.5 Gigabit Ethernet and Wi-Fi 6E, this motherboard delivers fast and reliable Internet access. The ASUS PRIME B850M-A WIFI-CSM is designed for DIY enthusiasts, offering a user-friendly BIOS and a multitude of features, making it suitable for building a powerful and future-ready system.
- Supports Ryzen 7000/8000/9000 Series processors
- Equipped with DDR5 SDRAM and memory speeds up to 8000 MT/s
- Features multiple M.2 slots and versatile USB ports
- Integrated high definition audio for enhanced sound quality
- Robust networking with 2.5 Gigabit Ethernet and Wi-Fi 6E
- Versatile expansion options
This motherboard features a variety of expansion slots, including 4 x SATA-600 and 3 x M.2 slots, offering flexibility for storage and peripheral connectivity. - Enhanced audio experience
High definition audio output supports 8-channel sound, ensuring an immersive audio experience for gaming and multimedia applications. - Reliable networking capabilities
With integrated 2.5 Gigabit Ethernet and support for Wi-Fi 6E, this motherboard delivers fast and reliable Internet connectivity for gaming and streaming. - User-friendly BIOS features
The UEFI BIOS with ASUS EZ Flash 3 and ASUS EZ Mode simplifies the setup process, making it accessible for users of all skill levels. - Robust power design
Offers an 8+2+1 phase power design, ensuring stable and efficient power delivery to support demanding processors and applications.
Main Specifications
Product Description | ASUS PRIME B850M-A WIFI-CSM – motherboard – micro ATX – Socket AM5 – AMD B850 |
Product Type | Motherboard – micro ATX |
Chipset Type | AMD B850 |
Processor Socket | 1 x Socket AM5 |
Compatible Processors | Ryzen (supports Ryzen 7000/8000/9000 Series) |
Max RAM Size | 256 GB |
RAM Supported | 4 DIMM slots – DDR5, on-die ECC, non-ECC, ECC, unbuffered |
Storage Ports | 4 x SATA-600 (RAID), 3 x M.2 |
USB / FireWire Ports | 2 x USB 3.2 Gen 2 + 2 x USB 3.2 Gen 1 + 4 x USB 2.0 + (1 x USB-C 3.2 Gen 1 + 2 x USB 3.2 Gen 1 + 4 USB 2.0 via headers) |
Audio | HD Audio (8-channel) |
LAN | 802.11a/b/g/n/ac/ax (Wi-Fi 6E), Bluetooth 5.3, 2.5 Gigabit Ethernet |
Pricing Type | ASUS Corporate Stable Model (CSM) |
Extended Specifications
General
Product Type | Motherboard – micro ATX |
|---|---|
Chipset Type | AMD B850 |
Processor Socket | Socket AM5 |
Max Processors Qty | 1 |
Compatible Processors | Ryzen (supports Ryzen 7000/8000/9000 Series) |
Supported RAM
Max Size | 256 GB |
|---|---|
Technology | DDR5 |
Bus Clock | 8000 MT/s (O.C.) |
Supported RAM Integrity Check | On-die ECC, non-ECC, ECC |
Registered or Buffered | Unbuffered |
Features | Dual channel memory architecture, AMD EXPO technology |
Audio
Type | HD Audio (8-channel) |
|---|---|
Compliant Standards | High Definition Audio |
LAN
Network Interfaces | 802.11a/b/g/n/ac/ax (Wi-Fi 6E), Bluetooth 5.3, 2.5 Gigabit Ethernet |
|---|
Expansion / Connectivity
Expansion Slots | 1 x CPU 4 x DIMM 288-pin 1 x PCIe 5.0 x16 1 x PCIe 4.0 x16 2 x M.2 socket (2280 M.2 Key M slot) 1 x M.2 socket (2230/2242/2260/2280 M.2 Key M slot) |
|---|---|
Storage Interfaces | SATA-600 -connectors: 4 x 7pin Serial ATA – RAID 0 / RAID 1 / RAID 10 / RAID 5 PCIe 5.0 -connectors: 1 x M.2 PCIe 4.0 -connectors: 2 x M.2 |
RAID Features | AMD RAID Xpert2 Technology |
Interfaces | 1 x LAN (2.5Gigabit Ethernet) 1 x HDMI 1 x DisplayPort 2 x USB 3.2 Gen 2 2 x USB 3.2 Gen 1 4 x USB 2.0 1 x audio line-out – mini-jack 1 x audio line-in – mini-jack 1 x audio line-out (rear) – mini-jack 2 x aerial |
Internal Interfaces | 1 x USB-C 3.2 Gen 1 – header 2 x USB 3.2 Gen 1 – header 4 x USB 2.0 – header 1 x SPDIF out – header 1 x SPI – header 1 x audio – header 1 x serial – header |
Power Connectors | 24-pin main power connector, 8-pin ATX12V connector, 4-pin ATX12V connector |
Features
BIOS Type | AMI |
|---|---|
BIOS Features | UEFI BIOS, ASUS EZ Flash 3, ASUS UEFI BIOS EZ Mode |
Sleep / Wake Up | Wake on LAN (WOL), wake on PME |
Hardware Features | ASUS Enhanced Memory Profile (AEMP), CrashFree BIOS 3, Preboot eXecution Environment (PXE), ASUS Aura Sync, TUF LANGuard, ASUS DIGI+ VRM, ASUS EZ DIY, ASUS Overvoltage Protection, ASUS ProCool, ASUS Q-Design, ASUS SafeDIMM, ASUS SafeSlot, ASUS Stainless Steel Back I/O, ASUS TUF Protection, BIOS FlashBack button, BIOS FlashBack LED, M.2 heatsink, M.2 Q-Latch, PCIe Slot Q-Release, pre-mounted I/O shield, Q-Antenna, Q-Dashboard, Q-DIMM, Q-LED, VRM heatsink design, 8+2+1 Phase Power Design, DIY Friendly Design, chipset heatsink, 8 Layer PCB, TUF 5K black metallic capacitors, PCH heatsink |
Miscellaneous
Included Accessories | ASUS Wi-Fi Q-antenna, 1 x M.2 rubber package, 2 x M.2 screw package |
|---|---|
Cables Included | 2 x Serial ATA cable |
Software Included | Adobe Creative Cloud (free trial), Armoury Crate, ASUS AURA Creator, ASUS DriverHub, ASUS Fan Xpert 4, ASUS GlideX, ASUS TUF GAMING CPU-Z, Norton 360 for Gamers (60 days trial), TurboV Core, WinRAR (40 days trial), DTS Audio Processing |
Width | 24.4 cm |
Depth | 24.4 cm |
Pricing Type | ASUS Corporate Stable Model (CSM) |
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