Compatible with AMD Ryzen W790 Workstation Motherboards. Product Specification- Memory Type: DDR5 OC R-DIMM (ECC Registered DIMM) Chip: Hynix IC Pin: 288 Pin Memory Capacity:256GB (32GBx8) Speed: 5600MHz (PC5-44800) Latency: CL46 IC Configuration: 4Gx4 Rank: 1Rx4 FOR WORKSTATION MOTHERBOARDS. NOT COMPATIBLE WITH DESKTOP PC AND LAPTOP. Equipped with high quality Hynix IC. Each IC is tested rigorously with auto sorting equipment designed by v-color. With Limited Lifetime Warranty it includes the service and product we could provide on the market.