NEMIX RAM 1TB (4X256GB) DDR5 4800MHZ PC5-38400 4Rx4 1.1V CL40 288-PIN ECC RDIMM Registered Server Memory KIT Compatible with ASRock Pro WS TRX50-SAGE WiFi Workstation Motherboard

I've installed this memory in more machines than I can remember at this point, and it works great every time. Never had a bad stick and every single one goes through at least one pass of memtest. Works on ASRock, Asus, and Gigabyte TRX50 boards.

Used this with an AMD Threadripper Pro 7965WX + Asus WRX90E-SAGE motherboard, and it's great! I'm using 8x64GB and all are clocking @ 5600Mhz as advertised, with no issues as far as compatibility.

These modules were not compatible with ASRock TRX50 as the board failed to POST. Was able to get the build going with another brand of modules. Also seller charged 10% restocking fee for the return despite the fact that the item description is not accurate. Stay away.