Asus Prime B650EM-A WIFI-CSM M-ATX Motherboard
MPN PRIME-B650EM-A-WIFI-CSM · Brand ASUS · mATX
The ASUS Prime B650EM-A WIFI-CSM is a Micro-ATX AM5 motherboard with AMD B650 chipset, DDR5 support up to 256 GB, PCIe 5.0, Wi-Fi 6, Realtek 2.5Gb LAN, and corporate CSM lifecycle assurance for AMD Ryzen 7000/8000/9000 Series builds
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Overview
The ASUS Prime B650EM-A WIFI-CSM is a Micro-ATX motherboard built on AMD's B650 chipset, designed for the AM5 socket and compatible with AMD Ryzen 7000, 8000, and 9000 Series desktop processors. It ships with a Corporate Stable Model (CSM) designation, which means ASUS commits to up to 36 months of product lifecycle support and a 6-month end-of-life notice — making it a sound choice for business deployments, small offices, and IT-managed environments alongside personal builds. Connectivity is a highlight of this board. It carries a PCIe 5.0 x16 primary slot and a PCIe 5.0 M.2 slot (when paired with Ryzen 9000 or 7000 Series CPUs), allowing next-generation storage and GPU bandwidth without compromise. Wireless networking is handled by an onboard Wi-Fi 6 module with Bluetooth 5.4, while a Realtek 2.5Gb Ethernet port provides fast wired connectivity. The rear I/O panel includes 2 × USB 10Gbps Type-A ports, 2 × USB 5Gbps Type-A ports, and 4 × USB 2.0 Type-A ports, along with 2 × DisplayPort and 1 × HDMI video outputs and a BIOS FlashBack button for firmware updates without a CPU installed. Memory support uses DDR5 across a dual-channel configuration, with a maximum capacity of 256 GB. The board supports both ECC and non-ECC unbuffered DIMMs and is compatible with AMD EXPO overclocking profiles as well as ASUS's own AEMP profiles, with officially rated speeds up to 8000+ MT/s depending on kit and CPU. For storage, three M.2 Key-M slots and four SATA 6Gb/s ports are provided. Thermal management includes a VRM heatsink, M.2 heatsink, and PCH heatsink. Fan control is managed through ASUS Fan Xpert 2+ software, with five fan/pump headers onboard: one CPU Fan, one CPU OPT, one AIO Pump, and three Chassis Fan headers, all 4-pin. RGB personalisation is supported via three Addressable Gen 2 (ARGB) headers, all controllable through ASUS Aura Sync. The board also includes one COM port header, a chassis intrusion header, an S/PDIF out header, and a 14-1 pin SPI TPM header for security applications. Each unit bundles ASUS Control Center Express — IT management software that enables remote monitoring, scheduled BIOS and software updates, and endpoint configuration management, reinforcing the board's corporate-oriented positioning. Key Specifications: - Socket: AM5 - Chipset: AMD B650 - Supported CPUs: AMD Ryzen 9000, 8000, 7000 Series - Form Factor: Micro-ATX - Memory: DDR5, Dual Channel, up to 256 GB, up to 8000+ MT/s (EXPO/AEMP) - Primary PCIe Slot: PCIe 5.0 x16 (x16 mode, Ryzen 9000/7000); PCIe 4.0 x16 (x8/x4 mode, Ryzen 8000) - M.2 Slots: 3 × Key-M - SATA: 4 × SATA 6Gb/s - Wireless: Wi-Fi 6, Bluetooth 5.4 - LAN: Realtek 2.5Gb Ethernet - USB (Rear): 2 × USB 10Gbps + 2 × USB 5Gbps + 4 × USB 2.0 (all Type-A) - Video Output: 2 × DisplayPort, 1 × HDMI - ARGB Headers: 3 × Addressable Gen 2 - Warranty: 3 Years
Datasheet
| Memory Type | DDR5 |
|---|---|
| Warranty | 3 Years |
| Form Factor | mATX |
| Chipset | B650 |
| Socket | AM5 |
| CPU Type | Ryzen 9000,Ryzen 8000,Ryzen 7000 |
| Max Memory | 256 GB |
| Memory Speed | up to 8000+ |
| Platform | AMD |
| Graphics Port | 2 x DisplayPort, 1 x HDMI |
| Memory Feature | ECC and Non-ECC Un-buffered DIMM 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 asus.brand websdite. 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 |
| 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 B650 Chipset 1 x PCIe 4.0 x16 slot (supports x1 mode) ** Specifications vary by CPU types |
| Channel Supported | Dual Channel |
| Wireless Networking | Wi-Fi 6, Bluetooth v5.4 |
| 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 HDMI port 1 x Wi-Fi module 1 x Realtek 2.5Gb Ethernet port 3 x Audio jacks 1 x BIOS FlashBack button |
| Internal I/O Connector | 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 connector 1 x 4-pin +12V CPU Power connector 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 Front Panel System header |
