AsRock B850M Pro-A
The ASROCK B850M Pro-A is a Micro ATX motherboard with the mid-range AMD B850 chipset and the AMD AM5 socket. It supports Ryzen 9000, 8000, and 7000 CPUs.
Graphics cards and NVMe SSDs are connected via PCIe 5.0. USB 3.1 enables data transfer rates of up to 10 Gbit/s.
To get the most out of your gaming PC, you can overclock the CPU to higher clock speeds via the motherboard. This ensures a stable power supply to the processor, allowing even high-end CPUs to operate at full performance for longer periods. You can also fully utilize DDR5 memory through overclocking. If needed, the ASROCK B850M Pro-A offers BIOS Flashback.
| The essentials at a glance | |
|---|---|
| Processor family | AMD 7000 Series |
| Memory type | DDR5 RAM |
| Motherboard features |
|
| Internal connection options | M.2 (3×), S-ATA III (4×), TPM header |
| Number of memory modules (RAM) | 4× |
| Item number | 53885128 |
| General information | |
| Manufacturer | AsRock |
| Category | Motherboard |
| Manufacturer number | 90-MXBR8-A0UAYZ |
| Release date | 06.01.2025 |
| Sales rank (motherboard category) | 286 of 991 |
| Motherboard specifications | |
| Form factor | Micro ATX (mATX) |
| Socket | AM5 |
| Chipset | AMD B850 |
| Motherboard features |
|
| Operating system compatibility | Windows, Windows 10 |
| BIOS type | UEFI AMI |
| Processor | |
| Processor family | AMD 7000 Series |
| Memory | |
| Memory form factor | DIMM |
| Number of memory modules (RAM) | 4× |
| Max. memory (RAM) | 256 GB |
| Memory chip | DDR5 SDRAM |
| Max. RAM OC | 8000 MHz |
| Supported memory speed | 8000 MHz |
| Memory type | DDR5 RAM |
| RAM buffer | unbuffered |
| Graphics features | |
| Video connections | DisplayPort (1×), HDMI OUT (1×) |
| Video connection version | DisplayPort 1.4, HDMI 2.1 |
| Network | |
| Network connections | RJ45 2.5 Gigabit Ethernet (1×) |
| Ethernet controller brand | Realtek |
| Ethernet controller | Dragon RTL8125BG |
| Max. port speed | 2.50 Gbit/s |
| Audio | |
| Chip | Realtek ALC897 |
| Audio channel | 7.1 channel |
| Audio connections | 3.5 mm jack line-in (1×), microphone |
| Data storage | |
| RAID configuration | 0, 1, 10 |
| Internal interfaces | |
| Internal connection options | M.2 (3×), S-ATA III (4×), TPM header |
| Expansion slot | PCI Express x16 (1×) |
| PCI Express version (max.) | 5 |
| Number of fan connectors | 5 |
| Other connections | |
| USB connections | USB-A, USB-C |
| Exact USB connections | USB-A 3.2 Gen 1 (2×), USB-A 3.2 Gen 2 (1×), USB-C 3.2 Gen 1 (1×) |
| Power supply | |
| Power connectors | 24-pin ATX, 4-pin Molex, 8-pin EATX 12V |
| Origin | |
| Country of origin | China |
| Voluntary climate contribution | |
| CO₂ emissions | 456.29 kg |
| Climate contribution | CHF 5.98 |
| Scope of delivery | |
| Scope of delivery | SATA cable, screws |
| Product dimensions | |
| Length | 244 mm |
| Width | 244 mm |
| Height | 244 mm |
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