| Basic Information | ||
| Supported CPU | AMD Socket AM5 for AMD Ryzen 9000 & 8000 & 7000 Series Desktop Processors | |
| Chipset | AMD B850 Chipset | |
| BIOS | 256 Mb Flash ROM, UEFI AMI BIOS | |
| Form Factor | micro-ATX Form Factor | |
| Audio | Realtek 7.1 Surround Sound High Definition Audio CODEC | |
| Expansion Slots | ||
| PCI | 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 B850 Chipset 1 x PCIe 4.0 x1 slot |
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| M.2 Socket | 2 x M.2 slots (Key M) | |
| Memory | ||
| Maximum Memory | max. 128GB | |
| Slots | 2 x DIMM slots | |
| Supported Memory | Supports up to 8200+MT/s(OC) with Ryzen 9000 Series Processors, 8400+MT/s(OC) with Ryzen 8000 Series Processors, 8000+MT/s(OC) with Ryzen 7000 Series Processors, ECC and Non-ECC, Un-buffered DIMM* Dual-channel memory architecture Supports AMD Extended Profiles for Overclocking (EXPO) ASUS Enhanced Memory Profile (AEMP) |
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| Type | DDR5 | |
| Graphics | ||
| Graphics | 1 x HDMI port** * Graphics specifications may vary between CPU types. Please refer to AMD CPU specifications. ** Supports 4K@60Hz as specified in HDMI 2.1. |
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| Connector & Ports | ||
| HDMI | 1x HDMI 2.1 | |
| USB (s) | Rear USB (Total 6 ports) 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 * USB Type-C power delivery output: max. 5V/3A. |
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| LAN Port (s) | 1 x Realtek 1Gb Ethernet ASUS LANGuard |
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| Supported Storage | Total supports 2 x M.2 slots and 4 x SATA 6Gb/s ports AMD Ryzen 9000 & 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 2242/2260/2280 (supports PCIe 4.0 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 2242/2260/2280 (supports PCIe 4.0 x4/x2 mode)* AMD B850 Chipset 4 x SATA 6Gb/s ports * Specifications vary by CPU types. |
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| RAID | AMD RAIDXpert2 Technology* Ryzen 9000 Series Processors: RAID 0/1/5/10 Ryzen 8000 Series Processors: RAID 0/1 Ryzen 7000 Series Processors: RAID 0/1/10 * Specifications vary by CPU types. |
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| 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 * A chassis with an HD audio module in the front panel is required to support 7.1 Surround Sound audio output. |
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| Internal I/O Ports | Fan and Cooling Related 1 x 4-pin CPU Fan header 2 x 4-pin Chassis Fan headers Power Related 1 x 24-pin Main Power connector 1 x 8-pin +12V CPU Power connectors Storage Related 2 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 COM Port header 1 x Front Panel Audio header (F_AUDIO) 1 x S/PDIF Out header 1 x SPI TPM header (14-1pin) 1 x 10-1 pin Front Panel System header Back Panel I/O Ports 2 x USB 5Gbps ports (2 x Type-A) 4 x USB 2.0 ports (4 x Type-A) 1 x HDMI port 1 x Realtek 1Gb Ethernet port 3 x Audio jacks 1 x BIOS FlashBack button |
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| TPM (Trusted Platform Module ) | 1 x SPI TPM header (14-1pin) | |
| Others | ||
| Special Features | ASUS 5X PROTECTION III - DIGI+ VRM - LANGuard - Overvoltage protection - SafeSlot - Stainless-steel back I/O ASUS Q-Design - Q-Dashboard - Q-DIMM - Q-LED Core - Q-Slot ASUS Thermal Solution - Aluminum heatsink design ASUS EZ DIY - BIOS FlashBack button - BIOS FlashBack LED Aura Sync - Addressable RGB Gen 2 headers |
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| Bundled Software | ASUS Exclusive Software Armoury Crate - Aura Creator - Aura Sync - Fan Xpert 2+ ASUS AI Advisor ASUS DriverHub ASUS CPU-Z TurboV Core Adobe Creative Cloud (Free Trial)** Norton 360 Deluxe (60 Days Free Trial) WinRAR (40 Days Free Trial) UEFI BIOS AI Cache Boost ASUS EZ DIY - ASUS CrashFree BIOS 3 - ASUS EZ Flash 3 - ASUS UEFI BIOS EZ Mode - ASUS MyHotkey |
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| Warranty Information | ||
| Warranty | 3 Year | |
The Asus PRIME B850M-F-CSM is a feature-rich micro-ATX motherboard designed to maximize the potential of AMD Ryzen™ 9000, 8000, and 7000 Series processors on the AM5 socket. Built on the AMD B850 chipset, this motherboard combines a compact form factor with robust power delivery, comprehensive cooling controls, and next-generation connectivity, making it an exceptional foundation for both budget-conscious gaming rigs and mainstream productivity builds. Equipped with dual-channel DDR5 memory slots, the PRIME B850M-F-CSM supports extreme memory overclocking via AMD EXPO™ technology, unlocking enhanced system responsiveness. For storage and expansion, it features PCIe 5.0/4.0 M.2 slots for ultra-fast NVMe SSDs and a reinforced PCIe 4.0 x16 slot to support modern graphics cards without throughput bottlenecks. Demanding workflows are managed smoothly thanks to a robust VRM design, high-quality alloy chokes, and durable capacitors that ensure stable power delivery under heavy loads. Cooling is a priority, with dedicated heatsinks for vital components and intelligent Fan Xpert software providing multi-source temperature monitoring to keep the system running quietly and efficiently. Connectivity options are comprehensive, featuring high-speed Realtek Gigabit Ethernet, multiple USB 3.2 Gen 1 ports, and onboard video outputs (HDMI/VGA) for versatile display configurations.
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