8GB KIT 2 x 4GB For Dell Precision Workstation Series T1600 T1650 T1700 T3500 T3600 T3610 T5500 DIMM DDR3 ECC Unbuffered PC3-12800 1600MHz RAM Memory 8GB KIT (2 x 4GB) DIMM DDR3 ECC Unbuffered PC3-12800 1600MHz 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)