4GB KIT (2 x 2GB) For Dell Precision Workstation Series T7500. DIMM DDR3 ECC Registered PC3-8500 1066MHz Quad Rank RAM Memory. Genuine A-Tech Brand. 4GB KIT (2 x 2GB) DIMM DDR3 ECC Registered PC3-8500 1066MHz Quad Rank RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Dell Precision Workstation Series. (See Compatibility List Below)