Asus Motherboard Prime B850M-A-CSM

Specifications:

• Product Number: 90MB1J10-M0EAYC
• Model: PRIME B840M-A-CSM

Processor

• Socket: AM5
• Compatible: AMD Ryzen 9000 & 8000 & 7000 Series Desktop Processors
• Chipset: AMD B850

Memory

• 4 x DIMM slots
• max. 256GB
• DDR5 Supports up to 8000+MT/s (OC
• Ryzen™ 9000 & 8000 & 7000 Series Processors
• ECC and Non-ECC Un-buffered DIMM
• Dual channel memory architecture
  
• Supports AMD Extended Profiles for Overclocking (EXPO)
  
• ASUS Enhanced Memory Profile (AEMP)
  

Graphics

• 2 x DisplayPort
  
• 1 x HDMI port
  
• Supports max. 8K@30Hz as specified in DisplayPort 1.4
• Supports 4K@60Hz as specified in HDMI 2.1

Expansion Slots

• AMD Ryzen 9000 & 7000 Series Desktop Processors
  
  • 1 x PCIe 5.0 x16 slot (supports x16 mode)
    
• AMD Ryzen8000 Series Desktop Processors
  
  • 1 x PCIe 4.0 x16 slot (supports x8/x4 mode)
    
• AMD B850 Chipset
  
  • 1 x PCIe 4.0 x16 slot (supports x4 mode)
    

Storage

• Supports 3 x M.2 slots and 4 x SATA 6Gb/s ports
  
• 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 (supports PCIe 4.0 x4 mode)
    
• 4 x SATA 6Gb/s ports
  

Ethernet

• 1 x Realtek 2.5Gb Ethernet
  
• ASUS LANGuard

USB

• Rear
• 2 x USB 10Gbps ports (2 x Type-A )
  
• 2 x USB 5Gbps ports (2 x Type-A)
  
• 4 x USB 2.0 ports (4 x Type-A)
  
• Front 
  
• 1 x USB 5Gbps connector (supports USB Type-C)
  
• 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports
  
• 2 x USB 2.0 headers support 4 additional USB 2.0 ports
  
• USB Type-C power delivery output: max. 5V/3A

Audio

• 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
    

I/O Ports

• Back
  
  • 2 x USB 10Gbps ports (2 x Type-A)
    
  • 2 x USB 5Gbps ports (2 x Type-A)
    
  • 4 x USB 2.0 ports (4 x Type-A)
    
  • 2 x DisplayPort
    
  • 1 x HDMI port
    
  • 1 x Realtek 2.5Gb Ethernet port
    
  • 3 x Audio jacks
    
  • 1 x BIOS FlashBack button
• Internal:
  • 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
    
  • 3 x 4-pin Chassis Fan headers
    
• Power Related
  
  • 1 x 24-pin Main Power connector
    
  • 1 x 8-pin +12V CPU Power connectors
    
  • 1 x 4-pin +12V CPU Power connectors
    
• Storage Related
  
  • 3 x M.2 slots (Key M)
    
  • 4 x SATA 6Gb/s ports
    
• USB
  
  • 1 x USB 5Gbps connector (supports USB Type-C)
    
  • 1 x USB 5Gbps header supports 2 additional USB 5Gbps ports
    
  • 2 x USB 2.0 headers support 4 additional USB 2.0 ports
    
• 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

Special Features

• ASUS 5X PROTECTION III
  
  • DIGI+ VRM
    
  • LANGuard
    
  • Overvoltage protection
    
  • SafeSlot
    
  • Stainless-steel back I/O
    
• ASUS Q-Design
  
  • Q-Dashboard
    
  • Q-DIMM
    
  • Q-LED Core
    
  • Q-Slot
    
• ASUS Thermal Solution
  
  • 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

BIOS

• 256 Mb Flash ROM, UEFI AMI BIOS

Dimensions

• 9.6 inch x 9.6 inch (24.4 cm x 24.4 cm)
• Form Factor: micro ATX