ASRock B850 Pro RS AM5 ATX Motherboard - DDR5, PCIe 5.0
ASRock
ASRock B850 Pro RS AM5 ATX Motherboard - DDR5, PCIe 5.0
The ASRock B850 Pro RS AM5 ATX Motherboard is built for PC builders who want a stable, efficient foundation for AMD Ryzen 7000, 8000 and 9000 series processors without sacrificing overclocking headroom. It pairs a robust 14+2+1 phase power delivery system with DDR5 support up to 8000+ MHz and PCIe 5.0 connectivity, covering everyday computing through to enthusiast gaming in a single platform.
Why this product
14+2+1 Phase Power with 80A Dr.MOS
Each phase uses an integrated 80A Dr.MOS power stage, delivering higher current per phase than discrete MOSFETs for improved thermal performance and stable CPU power delivery under load.
DDR5 up to 8000+ MHz with XMP and EXPO
Four DDR5 DIMM slots support up to 256 GB and pre-tested overclocking profiles compatible with both Intel XMP and AMD EXPO memory modules.
PCIe 5.0 and Four M.2 Slots
One PCIe 5.0 x16 slot pairs with one PCIe Gen5 M.2, two PCIe Gen4 M.2 and one PCIe Gen3 M.2 for current and next-generation storage and graphics options.
2.5 Gigabit LAN for faster networking
The Realtek Dragon RTL8125BG provides 2.5 Gb/s wired networking, delivering up to 2.5× the bandwidth of standard Gigabit Ethernet for gaming, file transfers and streaming.
USB 3.2 Gen2x2 Type-C front header
A front-panel USB 3.2 Gen2x2 Type-C header supports up to 20 Gbps data transfer, useful for connecting high-speed external drives directly from the case.
8-Layer PCB for signal and power stability
The 8-layer board design provides stable signal traces and power planes, which contributes to lower operating temperatures and more headroom for memory overclocking.
- SocketAMD AM5
- ChipsetAMD B850
- Form FactorATX
- Memory4× DDR5 DIMM, up to 256 GB, up to 8000+ MHz (OC)
- Primary PCIe SlotPCIe 5.0 x16
- M.2 Slots1× Gen5, 2× Gen4, 1× Gen3
- LAN2.5 Gigabit (Realtek Dragon RTL8125BG)
- USB (Rear)1× USB 3.2 Gen2 Type-C, 1× USB 3.2 Gen1 Type-C, 4× USB 3.2 Gen1, 6× USB 2.0
- SKUASR-2547
- EAN4711581490161
- Fits AMD AM5 socket processors: Ryzen 9000, 8000 and 7000 series.
- Standard ATX form factor; fits any case rated for ATX motherboards.
- DDR5 ECC and non-ECC un-buffered memory modules are supported across all four DIMM slots.
- Integrated graphics output via HDMI 2.1 (up to 4K 120Hz) and USB Type-C DisplayPort alt mode (up to 4K 60Hz) when using a Ryzen processor with integrated graphics.
- Wi-Fi is not built in; an M.2 Key E slot is provided for an optional Wi-Fi card.
- Does not support DDR4 memory — DDR5 modules only.
Best for
- AMD Ryzen builders who want a mid-range chipset board with PCIe 5.0 storage and graphics support without moving to a flagship platform.
- Memory overclockers who want XMP and EXPO profile support and an 8-layer PCB designed to handle DDR5 at 8000+ MHz.
- Home networkers and content creators who benefit from 2.5 Gb/s wired LAN for faster local file transfers and streaming.
- Gamers who want Nahimic audio processing and low-latency networking without adding a discrete sound card.
- Storage-heavy builds requiring four M.2 slots plus four SATA3 ports alongside the primary PCIe 5.0 x16 graphics slot.
Trade-offs
- Builders using DDR4 memory — this board is DDR5 only and existing DDR4 kits cannot be reused.
- Intel platform users — the AM5 socket is AMD-exclusive and Intel CPUs are not compatible.
- Wireless-only setups without a separate card — there is no onboard Wi-Fi; a Key E M.2 Wi-Fi module must be purchased separately.
- Small-form-factor cases — the ATX form factor will not fit Micro-ATX or Mini-ITX enclosures.
Modern and futuristic, with the attractive specifications and perfect balance, the Race Sport (RS) Edition is the evolution of the most popular PRO series motherboard. Optimized for stability, durability, and efficiency. It combines reliable performance, user-friendly features and streamlined style for daily computing tasks. Featuring sturdy components and completely smooth power delivery to the CPU. Plus, it offers unmatched overclocking capabilities and enhanced performance with the lowest temperature for advanced gamers as well.
Dr.MOS is the integrated power stage solution which is optimized for synchronous buck-set down voltage applications! Compared to traditional discrete MOSFETs, it intelligently delivers higher current for each phase, thus providing improved thermal result and superior performance. CPU overclocking requires higher current.
The 8 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 is built with high quality materials, enthusiasts are able to enjoy the boost of DDR5 memory overclocking performance by enabling the pre-tested profiles. Make sure the memory modules are Intel® XMP/AMD EXPO™ capable and overclocking can be made so affordable, satisfying and absolutely no sweat.
The intelligent 2.5Gb/s LAN platform is built for maximum networking performance for the demanding requirements of home networking, content creators, online gamers and high-quality streaming media. Boost networking performance up to 2.5X the bandwidth compared to the standard gigabit Ethernet, you'll enjoy the faster and uncompromised connectivity experience for gaming, file transfers and backups.
The latest USB 3.2 Gen2x2 Type-C delivers up to 20 Gbps data transfer rate which is 2x as fast as previous generation, providing a blazing fast data transfer interface with reversible USB Type-C design that fits the connector either way.
General
| Brand | ASRock |
|---|---|
| Model | B850 Pro RS |
| Form Factor | ATX |
| PCB Layers | 8 |
CPU & Memory
| CPU Socket | AMD Socket AM5 |
|---|---|
| Compatible CPUs | Ryzen 9000, 8000 and 7000 Series |
| Chipset | AMD B850 |
| Memory Slots | 4× DDR5 DIMM (288-pin), Dual Channel |
| Max Memory | 256 GB |
| Memory Type | DDR5 ECC/non-ECC, un-buffered |
| Memory Speed | Up to 8000+ MHz (OC); XMP and EXPO supported |
| Power Design | 14+2+1 Phase, 80A Dr.MOS |
Storage & Expansion
| PCIe Slots | 1× PCIe 5.0 x16, 1× PCIe 4.0 x16 |
|---|---|
| M.2 Slots | 1× PCIe Gen5, 2× PCIe Gen4, 1× PCIe Gen3 |
| SATA Ports | 4× SATA3 |
| Wi-Fi Slot | 1× M.2 Key E (card not included) |
Connectivity & Audio
| LAN | Realtek Dragon RTL8125BG, 2.5 Gb/s (10/100/1000/2500 Mb/s) |
|---|---|
| Audio | Realtek ALC897, 7.1 CH HD Audio, Nahimic Audio |
| Graphics Output | 1× HDMI 2.1 (HDR, HDCP 2.3, up to 4K 120Hz); 1× USB 3.2 Gen1 Type-C (DP 1.4 HBR3, up to 4K 60Hz, DP-alt) |
| USB Rear | 1× USB 3.2 Gen2 Type-C, 1× USB 3.2 Gen1 Type-C, 4× USB 3.2 Gen1, 6× USB 2.0 |
| USB Front Headers | 1× USB 3.2 Gen2x2 Type-C (20 Gbps), 4× USB 3.2 Gen1, 4× USB 2.0 |
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.