512GB Kit (8 x 64GB) DDR4-3200 PC4-25600 ECC Registered Memory for ASRock Rack ROMED8-2T AMD EPYC Board by NEMIX RAM System Specific Memory - Newegg.com
512GB (8x64GB) DDR4 PC4-19200T-L Server Memory RAM Kit for Supermicro X10DRFF-CG | eBay
Amazon.com: 512GB Kit (4 x 128GB) DDR4-2666 PC4-21300 ECC Load Reduced Memory for ASRock Rack ROMED8-2T AMD EPYC Board by NEMIX RAM : Electronics