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ATX motherboard, black PCB with silver heatsinks and I/O shield

ASUS

ASUS PRIME B850-PLUS WIFI AMD motherboard

SKU CH-DY8Z-5AV2N MPN PRIME B850-PLUS WIFI

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

  • CPU Socket TypeAM5
  • CPU TypeRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
  • ChipsetAMD B850
  • Number of Memory Slots4x288pin (DDR5)
  • Memory StandardSupports up to 8000+MT/s (OC)
  • Maximum Memory Supported192GB

Option PRIME B850-PLUS WIFI

Struck-through versions exist but are not stocked here.

  • Supports Ryzen 7000, 8000 and 9000 series processors on AM5 socket
  • DDR5 memory up to 8000 MT/s with EXPO and AEMP profiles
  • PCIe 5.0 x16 slot and PCIe 5.0 M.2 for fastest GPU and storage
  • Wi-Fi 6E and 2.5 Gb LAN plus USB 10 Gbps Type-A and Type-C
  • 8+2+1 phase power with VRM, M.2 and PCH heatsinks for stable cooling

AM5 socket for Ryzen 7000, 8000 and 9000 series

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.

PCIe 5.0 x16 slot and PCIe 5.0 M.2 slot

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.

Builders who need PCIe 5.0 graphics

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.

Highlights

  • Supports Ryzen 7000, 8000 and 9000 series processors on AM5 socket
  • DDR5 memory up to 8000 MT/s with EXPO and AEMP profiles
  • PCIe 5.0 x16 slot and PCIe 5.0 M.2 for fastest GPU and storage
  • Wi-Fi 6E and 2.5 Gb LAN plus USB 10 Gbps Type-A and Type-C
  • 8+2+1 phase power with VRM, M.2 and PCH heatsinks for stable cooling

Specifications

BrandASUS
ModelPRIME B850-PLUS WIFI
Part Number90MB1L80-MVAAY0
CPU Socket TypeAM5
CPU TypeRyzen 7000 Series / Ryzen 8000 Series / Ryzen 9000 Series
ChipsetAMD B850
Number of Memory Slots4x288pin (DDR5)
Memory StandardSupports up to 8000+MT/s (OC)
Maximum Memory Supported192GB
Channel SupportedDual Channel
Memory Performance ProfileAMD EXPO
ECC SupportedYes
Buffer SupportedUn-buffered
Memory FeatureASUS Enhanced Memory Profile (AEMP)
PCI Express 5.0 x16AMD 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 x161 x PCIe 4.0 x16 slot (support x4 mode)
PCI Express 3.0 x162 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.2AMD 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 RAIDAMD 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 ChannelsRealtek 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 Speed2.5Gbps
Wireless LANWi-Fi 802.11 ax
BluetoothBluetooth 5.3
Back I/O Ports1 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 USB1 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 ConnectorsFan 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 FactorATX
Dimensions (W x L)12.0" x 9.6"
Power Pin1 x 24-pin Main Power connector
1 x 8-pin +12V CPU Power connectors
1 x 4-pin +12V CPU Power connectors
BIOS Feature256 Mb Flash ROM, UEFI AMI BIOS
SoftwareASUS 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
FeaturesASUS 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 ContentsCables
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
Shipping weight1.66 kg
Package size356 × 273 × 70 mm

Other versions of this model

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Questions about this item

What does the 8000+ MT/s DDR5 rating mean when I install memory?

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.

How does the PCIe 5.0 x16 slot behave with different Ryzen series?

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).

What clearance and mounting does the M.2_1 slot need?

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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