ASUS PRIME B840M-A WIFI-CSM 90MB1J20-MVAAYC AMD motherboard
- AM5
- Ryzen 7000 Series /…
ASUS
ATX board for Ryzen 7000, 8000 and 9000 CPUs with DDR5 up to 8000 MT/s, PCIe 5.0 graphics and M.2, Wi-Fi 6E, 2.5Gb LAN and three M.2 slots
Option PRIME B850-PLUS WIFI
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This ATX motherboard uses the AMD B850 chipset and an AM5 socket that accepts Ryzen 7000, 8000 and 9000 series processors. It provides four DDR5 slots with a maximum capacity of 192 GB and supports AMD EXPO profiles for memory overclocking. The board also includes Wi-Fi 6E, 2.5 Gb LAN and rear USB 10 Gbps Type-A and Type-C ports for fast connectivity.
The primary expansion slot runs at PCIe 5.0 x16 when a Ryzen 7000 or 9000 series CPU is installed, dropping to PCIe 4.0 x16 with an 8000 series chip. The top M.2 socket supports PCIe 5.0 x4 speeds with the same processors, while a second M.2 slot operates at PCIe 4.0 x4. Four SATA 6 Gb/s ports and additional PCIe 3.0 x1 slots complete the storage and add-in card options.
Enthusiasts planning a high-end GPU and the fastest available M.2 drive will benefit from the PCIe 5.0 links on this board. Users staying with PCIe 4.0 components or requiring more than three M.2 sockets should consider alternative models.
| Brand | ASUS |
|---|---|
| Model | PRIME B850-PLUS WIFI |
| Part Number | 90MB1L80-MVAAY0 |
| CPU Socket Type | AM5 |
| CPU Type | Ryzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series |
| Chipset | AMD B850 |
| Number of Memory Slots | 4x288pin (DDR5) |
| Memory Standard | Supports up to 8000+MT/s (OC) |
| Maximum Memory Supported | 192GB |
| Channel Supported | Dual Channel |
| Memory Performance Profile | AMD EXPO |
| ECC Supported | Yes |
| Buffer Supported | Un-buffered |
| Memory Feature | ASUS Enhanced Memory Profile (AEMP) |
| PCI Express 5.0 x16 | AMD Ryzen 9000 & 7000 Series Desktop Processors 1 x PCIe 5.0 x16 slot (supports x16 mode) AMD Ryzen 8000 Series Desktop Processors 1 x PCIe 4.0 x16 slot (supports x8/x4 mode) |
| PCI Express 4.0 x16 | 1 x PCIe 4.0 x16 slot (support x4 mode) |
| PCI Express 3.0 x16 | 2 x PCIe 3.0 x16 slots (support x1 mode)* * The PCIEX16(G3)_1/2 share bandwidth with SATA6G_1/2. The SATA6G_1/2 will be disabled when The PCIEX16(G3)_1 or PCIEX16(G3)_2 runs. |
| Serial ATA (SATA) | 4 x SATA 6Gb/s |
| M.2 | AMD Ryzen 9000 & 7000 Series Desktop Processors M.2_1 slot (Key M), type 2280 (supports PCIe 5.0 x4 mode) M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) AMD Ryzen 8000 Series Desktop Processors M.2_1 slot (Key M), type 2280 (supports PCIe 4.0 x4 mode) M.2_2 slot (Key M), type 2280 (supports PCIe 4.0 x4/x2 mode) AMD B850 Chipset M.2_3 slot (Key M), type 2242/2260/2280/22110 (supports PCIe 4.0 x2 mode) |
| SATA RAID | AMD RAIDXpert2 Technology Ryzen 9000 Series Processors: RAID 0/1/5/10 Ryzen 8000 Series Processors: RAID 0/1 Ryzen 7000 Series Processors: RAID 0/1/10 |
| Audio Channels | 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. |
| Max LAN Speed | 2.5Gbps |
| Wireless LAN | Wi-Fi 802.11 ax |
| Bluetooth | Bluetooth 5.3 |
| Back I/O Ports | 1 x USB 10Gbps port (1 x USB Type-C) 3 x USB 10Gbps ports (3 x Type-A) 2 x USB 5Gbps ports (2 x Type-A) 2 x USB 2.0 ports (2 x Type-A) 1 x DisplayPort 1 x HDMI port 1 x Wi-Fi module 1 x Realtek 2.5Gb Ethernet port 3 x Audio jacks 1 x BIOS FlashBack button |
| Onboard USB | 1 x USB 5Gbps connector (supports USB Type-C) 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports 3 x USB 2.0 headers support 6 additional USB 2.0 ports |
| Other Connectors | Fan and Cooling Related 1 x 4-pin CPU Fan header 1 x 4-pin CPU OPT Fan header 1 x 4-pin AIO Pump header 4 x 4-pin Chassis Fan headers Miscellaneous 3 x Addressable RGB Gen 2 headers 1 x Clear CMOS header 1 x Chassis Intrusion header 1 x COM Port header 1 x Front Panel Audio header (F_AUDIO) 1 x S/PDIF Out header 1 x SPI TPM header (14-1 pin) 1 x 10-1 pin System Panel header 1 x Thunderbolt (USB4) header |
| Form Factor | ATX |
| Dimensions (W x L) | 12.0" x 9.6" |
| Power Pin | 1 x 24-pin Main Power connector 1 x 8-pin +12V CPU Power connectors 1 x 4-pin +12V CPU Power connectors |
| BIOS Feature | 256 Mb Flash ROM, UEFI AMI BIOS |
| Software | ASUS Exclusive Software Armoury Crate - Aura Creator - Aura Sync - Fan Xpert 2+ - Power Saving ASUS AI Advisor ASUS Driver Hub ASUS GlideX TurboV Core ASUS CPU-Z Adobe Creative Cloud (Free Trial) Norton 360 Deluxe (60 Days Free Trial) WinRAR (40 Days Free Trial) UEFI BIOS ASUS EZ DIY - ASUS CrashFree BIOS 3 - ASUS EZ Flash 3 - ASUS UEFI BIOS EZ Mode - ASUS MyHotkey |
| Features | ASUS 5X PROTECTION III - DIGI+ VRM - LANGuard - Overvoltage protection - SafeSlot - Stainless-steel back I/O ASUS Q-Design - Q-Antenna - Q-Dashboard - Q-DIMM - Q-LED Core - Q-Slot ASUS Thermal Solution - Flexible M.2 heatsink - VRM heatsink design ASUS EZ DIY - BIOS FlashBack button - BIOS FlashBack LED - Pre-mounted I/O shield - SafeSlot Aura Sync - Addressable RGB Gen 2 headers |
| Package Contents | Cables 2 x SATA 6Gb/s cables Miscellaneous 1 x ASUS WiFi Q-Antenna 1 x M.2 rubber packages 3 x Screw packages for M.2 SSD Documentation 1 x Quick start guide |
| 배송 무게 | 1.66 kg |
| 포장 크기 | 356 × 273 × 70 mm |
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The board supports DDR5 speeds up to 8000+ MT/s when overclocked via AMD EXPO or ASUS AEMP profiles, running dual-channel across four 288-pin slots with a 192 GB maximum.
With Ryzen 9000 or 7000 CPUs the top slot runs at PCIe 5.0 x16; with Ryzen 8000 CPUs it runs at PCIe 4.0 x16 (x8/x4 mode).
M.2_1 accepts 2280 Key M drives and is covered by the onboard M.2 heatsink; it runs PCIe 5.0 x4 with Ryzen 9000 or 7000 and PCIe 4.0 x4 with Ryzen 8000.
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