# ASUS Prime B650M-A II-CSM AMD B650 AM5 Ryzen™ Desktop 9000 8000 & 7000 Micro-ATX mATX Motherboard DDR5, PCIe 5.0 M.2, 2.5Gb LAN, DisplayPort, HDMI®, VGA, USB 3.2, USB 3.2 Type-C®, BIOS Flashback™

- Category: Motherboard
- Brand: ASUS
- Model: PRIME B650M-A II-CSM
- Part number: PRIME B650M-A II-CSM
- Price (US): currently unavailable
- Price last checked: 2026-08-06
- Rating: 4.6/5 from 1389 Amazon reviews
- Warranty: 2 years
- Product page: https://buildmypc.net/component-details/motherboard/asus-prime-b650m-a-ii-csm/

## Specifications

| Spec | Value |
| --- | --- |
| Brand | ASUS |
| Model | PRIME B650M-A II-CSM |
| Socket Type | AM5 |
| Chipset | AMD B650 |
| Form Factor | Micro ATX |
| Memory Type | 4 x DDR5 |
| Max Memory Support | 128 GB |

## Key Features

- AM5 Socket: Ready for AMD Ryzen Desktop 9000*, 8000*, and 7000 Series Processors
- *BIOS Update maybe required when used with AMD Ryzen Desktop 9000 and 8000 Series CPU Processors
- Ultrafast Connectivity: M.2 PCIe 5.0, Realtek 2.5Gb Ethernet, USB 3.2 Gen 2 ports, front USB 3.2 Gen 1 Type-C
- ASUS OptiMem II: Careful routing of traces and vias, plus ground layer optimizations to preserve signal integrity for improved memory overclocking
- Comprehensive Cooling: VRM heatsink, PCH heatsink, hybrid fan headers and Fan Xpert 2+
- Aura Sync RGB Lighting: Onboard Addressable Gen 2 headers and Aura RGB header for RGB LED strips, easily synced with Aura Sync-capable hardware
- ASUS Control Center Express (ACCE) for easier IT endpoint management
- BIOS FlashBack is the simplest and safest (UEFI) BIOS update method. Simply drop the (UEFI) BIOS file onto a FAT32 formatted USB stick, plug it into the USB BIOS FlashBack port and press the button. Updates can even be performed without a memory or a CPU installed.

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