ASUS PRIME B850-PLUS WIFI AMD motherboard
- Ryzen 7000 Series /…
- AMD B850
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ATX board for AMD AM5 CPUs with 14+2+1 80A DrMOS, DDR5 to 192GB, PCIe 5.0 x16 and M.2, Wi-Fi 7, 2.5Gb LAN, USB4 and DIY-friendly features
This ATX motherboard uses the AMD X870 chipset and the AM5 socket to support Ryzen 9000 8000 and 7000 series desktop processors. It delivers a 14+2+1 80A DrMOS power design on an 8-layer PCB with ProCool connectors. Four DDR5 slots accept up to 192GB of memory and support speeds beyond 8000 MT/s when overclocked with EXPO profiles.
PCIe 5.0 x16 graphics and the top M.2 2280 slot run at 5.0 speeds only with Ryzen 9000 or 7000 series CPUs. With Ryzen 8000 series the same slots operate at PCIe 4.0. The board also provides three chipset PCIe 4.0 x16 slots at x1 mode two SATA 6Gb/s ports and additional M.2 slots wired through the X870 chipset.
Comprehensive cooling uses a large VRM heatsink dual M.2 heatsinks and a PCH heatsink paired with hybrid fan headers controlled by Fan Xpert 4 and AI Cooling II. The 80A DrMOS stages and 8-layer PCB keep power delivery efficient under load. A Realtek 2.5Gb LAN controller and Wi-Fi 7 handle network traffic while the Realtek 7.1 audio codec drives 24-bit 192 kHz output.
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| Product | |
|---|---|
| Brand name | ASUS |
| Model name | PRIME X870-P WIFI |
| Part number | 90MB1IS0-M0AAY0 |
| Processor | |
| Chipset | AMD X870 |
| Memory | |
| Memory slot count | 4 × 288pin (DDR5) |
| Supported memory | DDR5 4400 |
| Max supported RAM | 192 GB |
| Memory channels | Dual Channel |
| ECC support | Yes |
| Buffering | Un-buffered |
| Storage | |
| SATA ports | 2 x SATA 6Gb/s |
| SATA and RAID support | * AMD RAIDXpert2 Technology supports both PCIe RAID 0/1/5/10 and SATA RAID 0/1. RAID 5 Function is only supportted by AMD Ryzen 9000 series CPU. |
| Audio & video | |
| Audio chip | 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. |
| Sound channels | 7.1 Channels |
| Connectivity | |
| Maximum network speed | 2.5 Gbit/s |
| Wi-Fi standard | Wi-Fi 802.11 be |
| Bluetooth support | 5.4 |
| Ports & slots | |
| PCIe 5.0 x16 slots | AMD Ryzen 9000 & 7000 Series Desktop Processors 1 x PCIe 5.0 x16 slot (supports x16 mode) |
| Onboard USB headers | 1 x USB 10 Gbit/s connector (supports USB Type-C) 1 x USB 5 Gbit/s header supports 2 additional USB 5 Gbit/s ports 2 x USB 2.0 headers support 4 additional USB 2.0 ports |
| Power | |
| Power connectors | 1 × 24-pin Main Power connector 2 × 8-pin +12 V CPU Power connectors |
| Size & build | |
| Form factor | ATX |
| Width and length | 12.0 in × 9.6 in |
| Compatibility | |
| Windows 11 support | Supported |
| In the box | |
| In the box | Cables 2 x SATA 6Gb/s cables Miscellaneous 1 x ASUS WiFi Q-Antenna 1 x M.2 rubber package 2 x Screw packages for M.2 SSD Documentation 1 x Quick start guide |
| More details | |
| BIOS | 256 Mb Flash ROM, UEFI AMI BIOS |
The board includes a pre-mounted I/O shield, Q-Antenna, M.2 Q-Latch and Flexible M.2 heatsink. You must purchase an AMD AM5 Ryzen 7000, 8000 or 9000 series processor, DDR5 memory, storage drives and a power supply separately.
The board supports up to 192 GB total across four 288-pin slots. A two-module kit activates dual-channel mode; add a second identical kit later if you need more capacity.
Fourteen 80 A DrMOS stages for the CPU cores, two for the SoC and one for auxiliary rails deliver stable current to Ryzen 7000, 8000 and 9000 processors under heavy multi-threaded loads.
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