256GB (4x64GB) DDR4 2933 (PC4 23400) 4Rx4 288-Pin 1.2V ECC Load Reduced Server Memory by NEMIX RAM

I wouldn’t recommend buying this ram for 2019 Mac Pro.. I’ve tried it but it definitely doesn’t run up to spec for what I would have like it to. Be careful went buying ram to save some cash it’s not all the same