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ASUS Prime B840M-R

B840 · AM5 · Micro-ATX
ASUS Prime B840M-R product image

General

ChipsetB840
SocketAM5
Form FactorMicro-ATX
Supported CPU FamiliesRyzen 7000, Ryzen 8000G, Ryzen 9000

Highlights

Memory2× DDR5 · max 128 GB · 7600 MT/s
M.2 Slots2×
GPU Slots1× x16 · PCIe 4.0
Fastest USBUSB 5 Gbps
NetworkLAN 1 Gbps
Power Stages6+2+1 phases

Manufacturer Links

BIOS downloads ↗CPU support list ↗Driver downloads ↗Memory QVL ↗
Is this part compatible with your build?Analyze part compatibility together with PC Analysis.
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Memory

Memory TypeDDR5
Max RAM Speed7600 MT/s
Max RAM128 GB
DIMM Slots2
RAM Form FactorDIMM
ECC SupportYes

Expansion and Storage

PCIe Version4.0
PCIe x16 Slots1
PCIe x1 Slots1
PCIe Slot Modes
1× PCIe 4.0 x16
1× PCIe 3.0 x1
M.2 Slots
M.2_1: PCIe 4.0 x4
M.2_2: PCIe 3.0 x4 · SATA supported
SATA Ports4
Highest USBUSB 5 Gbps
RAID0/1/10

Power Delivery (VRM)

Phase Layout6+2+1
CPU Phases6
SoC Phases2
Misc Phases1
MOSFET6x

Connectivity and Audio

Audio CodecRealtek
LAN ChipRealtek (1Gb/s)
Rear I/O
2× USB 2.0 Type-A
4× USB 5Gbps Type-A
1× HDMI
1× DisplayPort
1× 1 Gbps LAN
3× Audio jacks (3.5 mm)
1× PS/2
Front Panel Headers
4× USB 2.0
2× USB-A 5Gbps
1× USB-C 5Gbps
HD Audio (front audio)
Case Fan Headers3× 4-pin PWM fan
RGB Header3× ARGB (5V 3-pin)
TPM HeaderYes
BIOS Chip32 MB
Dual BIOSNo
Special Features
Audio+solid capacitors
White Build-compatible (PCB primarily black)
1x M.2 passive heatsink