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Motherboard
B650 UD AX (rev. 1.0)
Gigabyte
$16999
B850 Pro-A
ASRock
$13999
Chipset
AMD B650AMD B850
Socket
AM5AM5
Form Factor
ATXATX
Max Memory
192 GB256 GB
Memory Type
DDR5DDR5
Memory Slots
44
ECC Memory Support
No No
PCIe x16 Slots
32
PCIe x16 4.0 Slots
42
M.2 Slots
36
M.2 Slot Specifics
  1. 2580-25110M (PCIe4.0x4)
  2. 2280M (PCIe4.0x4)
  3. 2280-22110M (PCIe4.0x4)
  4. 2280M (PCIe4.0x4)
  5. 2280-22110M (PCIe4.0x4)
  6. 2280M (PCIe4.0x4)
  1. 2280M (PCIe4.0x4)
  2. 2280M (PCIe4.0x4)
  3. 2230-2242M (PCIe4.0x4)
  4. 2280M (PCIe4.0x4)
  5. 2280M (PCIe4.0x4)
  6. 2280E (PCIe4.0x4)
SATA Ports
40
USB 2.0 Headers
31
USB 3.2 Headers
11
USB 3.2 (Gen 2) Headers
10
WiFi
802.11 ax802.11 ax
Ethernet Speed
1 Gbps2.5 Gbps
Audio Chipset
RealtekRealtek
Audio Channels
7.17.1
Optical S/PDIF Out
Yes No
BIOS Flashback
Yes No
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 B650 UD AX (rev. 1.0) vs B850 Pro-A reveals distinct differences in their targeted use cases.

The B850 Pro-A is the more budget-friendly option, costing approximately $30 (21%) less than the B650 UD AX (rev. 1.0).