Compatible with - Compaq/HP EVO: D310 / D31M, D510 (D51/D51S), D530 CMT (P4 HT with 800 MHz FSB), D530 CMT (P4/Celeron with 533 MHz FSB), D530 SFF (P4 HT with 800 MHz FSB), D530 SFF (P4/Celeron with 533 MHz FSB), D530 Ultra-Slim Desktop - Compaq/HP ProLiant: ML330 G3 - Dell OptiPlex: GX260 (Rainier) - IBM/Lenovo ThinkCentre: A50 8177, 8178, 8179-xxx