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Motherboard
B840 PRO M-P WIFI6E
MSI
$23388
PRIME B650M-A II-CSM
ASUS
$26733
Chipset
AMD B840AMD B650
Socket
AM5AM5
Form Factor
Micro ATXMicro ATX
Max Memory
256 GB192 GB
Memory Type
DDR5DDR5
Memory Slots
44
ECC Memory Support
No No
PCIe x16 Slots
13
PCIe x16 4.0 Slots
13
PCIe x1 Slots
10
M.2 Slots
42
M.2 Slot Specifics
  1. 2260-2280M (PCIe4.0x4)
  2. 2280M (PCIe4.0x4)
  3. 2260-2280M (PCIe4.0x4)
  4. 2280M (PCIe4.0x4)
  1. 2242-2260M (PCIe4.0x4)
  2. 2280M (PCIe4.0x4)
  3. 2242-2260M (PCIe4.0x4)
  4. 2280M (PCIe4.0x4)
SATA Ports
04
USB 2.0 Headers
22
USB 3.2 Headers
11
USB 3.2 (Gen 2) Headers
11
WiFi
802.11 ax802.11 ax
Ethernet Speed
2.5 Gbps2.5 Gbps
Audio Chipset
RealtekRealtek
Audio Channels
7.17.1
Optical S/PDIF Out
No No
BIOS Flashback
No Yes
Color
DarkDark
Supported CPUs
AMD Ryzen 7000, 8000, 9000AMD Ryzen 7000, 8000, 9000
M.2 Heatsink/Shields
- Yes
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Comparison Analysis

Comparing the B840 PRO M-P WIFI6E vs PRIME B650M-A II-CSM reveals distinct differences in their targeted use cases.

The B840 PRO M-P WIFI6E is the more budget-friendly option, costing approximately $33 (14%) less than the PRIME B650M-A II-CSM.