ASUS PRIME B850-PLUS WIFI AMD motherboard
- Ryzen 7000 Series /…
- AMD B850
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ATX board for AMD Ryzen 7000, 8000 and 9000 CPUs with 16+2+1 80A power stages, four DDR5 slots up to 256GB, two PCIe 5.0 and two PCIe 4.0 M.2 slots, Wi-Fi 7.
This ATX motherboard uses the AMD X870 chipset and AM5 socket to support Ryzen 9000, 8000 and 7000 series processors. It provides four DDR5 slots with a native 4400 speed rating and a maximum capacity of 256 GB. Dual-channel architecture, EXPO and AEMP profiles are available for memory tuning. A 16+2+1 power design with 80 A SPS stages on an 8-layer PCB delivers stable current to the CPU.
PCIe 5.0 x16 graphics and two PCIe 5.0 M.2 slots operate at full speed only with Ryzen 9000 or 7000 series CPUs. Ryzen 8000 series processors limit the primary slot to PCIe 4.0 x8 or x4 and the M.2 slots to PCIe 4.0. Verify your processor generation before ordering to match expected bandwidth. Two SATA 6 Gbps ports and two additional PCIe 4.0 M.2 slots remain unaffected by the CPU choice.
The 80 A SPS power stages, alloy chokes and durable capacitors are built for continuous high-current delivery during long rendering or compute sessions. Massive heatsinks cover the VRM and all four M.2 slots to dissipate heat without relying on extreme airflow. AI Cooling II manages fan curves dynamically to keep temperatures stable over extended workloads rather than short bursts.
Measured against everything we stock in Motherboards for AMD CPUs, at today’s prices. Recalculated every night.
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| Product | |
|---|---|
| Brand name | ASUS |
| Model name | TUF GAMING X870-PLUS WIFI |
| Part number | 90MB1IU0-M0AAY0 |
| Processor | |
| CPU socket | AM5 |
| Chipset | AMD X870 |
| Memory | |
| Memory slot count | 4 × 288pin (DDR5) |
| Supported memory | DDR5 4400 |
| Max supported RAM | 256 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 Funciton is only supportted by AMD Ryzen 9000 series CPU. |
| Audio & video | |
| Audio chip | Realtek ALC1220P 7.1 Surround Sound High Definition Audio CODEC - Impedance sense for front and rear headphone outputs - Internal audio Amplifier to enhance the highest quality sound for headphone and speakers - Supports: Jack-detection, Multi-streaming, Front Panel Jack-retasking - High quality 120 dB SNR stereo playback output and 113 dB SNR recording input (Line-in) - Supports up to 32-Bit/192 kHz playback* Audio Features - Audio Shielding - Premium audio capacitors - Dedicated audio PCB layers - Audio cover - Unique de-pop circuit * Due to limitations in HDA bandwidth, 32-Bit/192 |
| Sound channels | 7.1 Channels |
| Ports & slots | |
| PCIe 5.0 x16 slots | AMD Ryzen 9000 & 7000 Series Desktop Processors 1 x PCIe 5.0 x16 slot (supports x16 mode) |
| PCIe 4.0 x16 slots | AMD Ryzen 8000 Series Desktop Processors 1 x PCIe 4.0 x16 slot (supports x8/x4 mode) |
| 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 |
| More details | |
| BIOS | 256 Mb Flash ROM, UEFI AMI BIOS |
The board ships with massive heatsinks covering the two PCIe 5.0 M.2 slots and the two PCIe 4.0 M.2 slots, so no extra heatsinks are required for any of the four M.2_1 through M.2_4 positions.
Use either of the two PCIe 5.0 x4 M.2 slots (M.2_1 or M.2_2) for the OS drive to get the highest sequential throughput; the PCIe 4.0 slots remain available for secondary storage.
Each of the 16 main Vcore phases can deliver up to 80 amps, giving the 16+2+1 VRM enough current headroom for high-core-count Ryzen 9000 processors under sustained heavy loads.
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