4GB PC3-10600E 240 pin DDR3 1333MHz Dual Rank x8 CAS-9 ECC Unbuffered UB DIMM Server Memory for HP ProLiant ML150 G6 (PARTS-QUICK BRAND). Equivalent to HP Part Number: 500672-B21 Capacity: 4GB DDR3 1333MHz 10600 ECC Unbuffered CAS 9 Form Factor: 240 pin DIMM Warranty: Lifetime ONLY FOR THE SERVER LISTED DO NOT BUY FOR STANDARD DESKTOPS WHICH USE NON-ECC MEMORY