Not seeing any limitation on ECC with ASRock.
Dual Channel DDR4 Memory Technology
- 4 x DDR4 DIMM Slots
- Supports DDR4 2667/2400/2133 ECC & non-ECC, un-buffered memory*
- Max. capacity of system memory: 64GB**
- 15μ Gold Contact in DIMM Slots
*Please refer to below table for DDR4 UDIMM maximum frequency support.
Ryzen Series CPUs:
UDIMM Memory Slot Frequency(MHZ)
A1 A2 B1 B2
- SR - - 2667
- DR - - 2667
- SR - SR 2667
- DR - DR 2400-2667
SR SR SR SR 2133-2400
SR/DR DR SR/DR DR 1866-2133
SR: Single rank DIMM, 1Rx4 or 1Rx8 on DIMM module label
DR: Dual rank DIMM, 2Rx4 or 2Rx8 on DIMM module label
**Due to the operating system limitation, the actual memory size may be less than 4GB for the reservation for system usage under Windows® 32-bit OS. For Windows® 64-bit OS with 64-bit CPU, there is no such limitation.