ASRock B850M-X R2.0 AM5 Micro-ATX Motherboard - DDR5, PCIe 5.0
ASRock
ASRock B850M-X R2.0 AM5 Micro-ATX Motherboard - DDR5, PCIe 5.0
The ASRock B850M-X R2.0 AM5 Micro-ATX Motherboard is a compact, AMD B850-based board aimed at builders who want DDR5, PCIe 5.0 capability, and solid connectivity without stepping up to a full-ATX footprint. It suits both everyday productivity users and those running demanding workloads who still need room for dual storage devices, a discrete GPU, and flexible USB options.
Why this product
PCIe 5.0 for GPU and M.2
The primary x16 slot runs PCIe 5.0, and the dedicated Blazing M.2 slot also operates at PCIe Gen 5 x4, so both your graphics card and fastest SSD can use the current generation of bandwidth.
DDR5 up to 8200+ MHz with OC profiles
Two DDR5 DIMM slots support dual-channel operation, ECC and non-ECC memory, and both XMP and EXPO overclocking profiles, with a maximum installed capacity of 128 GB.
6+1+1 phase power with Dr.MOS
The VCore uses Dr.MOS power stages across a 6+1+1 phase design, built on a 6-layer PCB that ASRock says improves signal integrity, lowers temperatures, and raises energy efficiency during memory overclocking.
Six storage connections on a Micro-ATX board
Two M.2 slots (one Gen 5, one Gen 4) plus four SATA3 ports give builders plenty of storage flexibility without needing a full-size board.
BIOS Flashback for firmware recovery
A dedicated BIOS Flashback button on the rear I/O lets you update or recover the firmware from a USB drive without a CPU or memory installed.
Polychrome RGB Sync and SignalRGB support
Onboard RGB and addressable RGB headers connect to compatible LED strips, fans, and coolers, with synchronisation available through ASRock Polychrome SYNC or the SignalRGB platform.
- Form FactorMicro-ATX
- SocketAMD AM5
- ChipsetAMD B850
- Memory2 x DDR5 DIMM, up to 128 GB, up to 8200+ (OC)
- Primary PCIe SlotPCIe 5.0 x16
- M.2 Slots2 (1 × PCIe Gen5 x4, 1 × PCIe Gen4 x4)
- LANRealtek 2.5G
- Display OutputHDMI 2.1 + DisplayPort 1.4
- SKUASR-1961
- EAN4711581490758
- Compatible with AMD Socket AM5 processors: Ryzen 9000, Ryzen 8000, and Ryzen 7000 Series.
- Accepts DDR5 ECC and non-ECC unbuffered DIMMs; two slots, max 128 GB.
- Fits Micro-ATX cases; also fits full-ATX and larger cases that accept smaller boards.
- Wi-Fi is not included on-board; an M.2 Key E slot is provided so a compatible Wi-Fi module can be added separately.
- Not compatible with AMD Socket AM4 or any Intel processors — the AM5 socket is physically distinct.
- Does not accept DDR4 memory — DDR5 only.
Best for
- Compact builds that still need PCIe 5.0: the Micro-ATX footprint keeps the build small while the primary x16 and M.2 slots run at Gen 5.
- Builders who want multiple storage options: two M.2 slots and four SATA3 ports on one board covers NAS-style or media-heavy setups without an expansion card.
- Users who prefer USB-C front-panel connectivity: a USB 3.2 Gen1 Type-C header is included for front-panel use alongside the rear Type-C port.
- Builders wanting display output from the CPU's integrated graphics: both HDMI 2.1 (up to 4K 120 Hz) and DisplayPort 1.4 are on the rear I/O.
- Those who value firmware recoverability: the BIOS Flashback button allows firmware updates without a working CPU or RAM installed.
Trade-offs
- Builders needing on-board Wi-Fi out of the box: the board has no integrated wireless adapter; only an M.2 Key E slot is provided for a separate module.
- Full-ATX builds expecting four memory slots: this board provides only two DDR5 DIMM slots, limiting maximum capacity to 128 GB and reducing multi-DIMM configuration options.
- Enthusiasts needing more than two PCIe card slots: the layout offers one PCIe 5.0 x16, one PCIe 4.0 x16, and one PCIe 4.0 x1 — not suited to triple-GPU or heavy multi-card expansion.
- Users requiring 7.1-channel analog audio beyond basic codec output: audio is handled by the Realtek ALC897 codec, which is a mid-range solution without a dedicated audio capacitor stage or op-amp.
The ASRock X-Series motherboard provides a high-value solution, balancing performance and versatility within a compact form factor. It's highly capable in handling a wide range of tasks, from professional productivity to everyday usage, striking an excellent balance between affordability, reliability, and efficiency.
The 6 Layer PCB provides stable signal traces and power shapes delivering lower temperature and higher energy efficiency for memory overclocking! Thus, it's able to support the latest memory modules with most extreme memory performance! Derived from the "built for stable and reliable" designing concept, ASRock does not compromise on any details.
This motherboard features onboard RGB headers and addressable RGB headers that allow motherboard to be connected to compatible LED devices such as strip, CPU fans, coolers, chassis and so on. Users may also synchronize RGB LED devices across the Polychrome RGB Sync-certified accessories to create their own unique lighting effects.
*The addressable RGB LED header supports WS2812B addressable RGB LED strip (5V/Data/GND), with a maximum power rating of 3A (5V), a max of 80 LEDs and length within 2 meters.
*The RGB LED header supports standard 5050 RGB LED strip (12V/G/R/B), with a maximum power rating of 3A (12V) and length within 2 meters.
SignalRGB unifies your RGB devices, offering seamless customization, game-reactive effects, macro automation, and system monitoring. The official partnership empowers ASRock motherboards with advanced lighting control, enhances compatibility with a diverse range of RGB devices, and provides greater customization flexibility.
General
| Brand | ASRock |
|---|---|
| Model | B850M-X R2.0 |
| Form Factor | Micro-ATX |
| Chipset | AMD B850 |
| CPU Socket | AMD AM5 |
| Supported CPUs | Ryzen 9000, 8000, and 7000 Series (AM5) |
Memory & Expansion
| Memory Type | DDR5, Dual Channel |
|---|---|
| DIMM Slots | 2 |
| Max Memory | 128 GB |
| Max Memory Speed | 8200+ MHz (OC) |
| Memory Profiles | XMP, EXPO |
| ECC Support | Yes (unbuffered ECC and non-ECC) |
| PCIe Slots | 1 × PCIe 5.0 x16, 1 × PCIe 4.0 x16, 1 × PCIe 4.0 x1 |
| M.2 Key E (Wi-Fi) | 1 × M.2 Key E slot |
Storage & Connectivity
| M.2 Slots | 1 × Blazing M.2 PCIe Gen5 x4, 1 × Hyper M.2 PCIe Gen4 x4 |
|---|---|
| SATA3 Ports | 4 |
| LAN | Realtek 2.5G LAN |
| USB Rear | 1 × USB 3.2 Gen1 Type-C, 3 × USB 3.2 Gen1 Type-A, 2 × USB 2.0 |
| USB Front Headers | 1 × USB 3.2 Gen1 Type-C, 2 × USB 3.2 Gen1, 4 × USB 2.0 |
| Display Output | 1 × HDMI 2.1 (up to 4K 120 Hz, HDR, HDCP 2.3), 1 × DisplayPort 1.4 with DSC (HDCP 2.3) |
Audio, Power & Features
| Audio Codec | Realtek ALC897 7.1 CH HD Audio, Nahimic Audio |
|---|---|
| Power Design | 6+1+1 Phase, Dr.MOS for VCore |
| PCB Layers | 6 |
| RGB Headers | Addressable RGB (5V/Data/GND, WS2812B, max 3A, 80 LEDs, 2 m) and standard RGB (12V/G/R/B, max 3A, 2 m) |
| RGB Software | ASRock Polychrome SYNC, SignalRGB |
| BIOS Features | BIOS Flashback, EZ Mode, Full HD UEFI, Auto Driver Installer, Instant Flash |
| Post Status Checker | Yes (ASRock Post Status Checker) |
Shipping
All our products are shipped from the United Kingdom within 24 to 48 hours of purchase. See our Shipping and Returns page for full details.
Returns
- Tech Syndicate offers a full money-back guarantee on all purchases made in our store. If you are not satisfied with your purchase, we will provide a full refund, no questions asked.
- Refunds are available within 45 days of delivery.
- After the 45-day period you are no longer eligible for a refund, so we encourage you to try the product within the first few weeks to make sure it fits your needs.