4GB STICK For Dell Precision Workstation Series T1500 T1600 (Non-ECC) T1650 (Non-ECC) T3500 (Non-ECC) T3600 (Non-ECC). DIMM DDR3 NON-ECC PC3-10600 1333MHz RAM Memory. Genuine A-Tech Brand. 4GB STICK DIMM DDR3 NON-ECC PC3-10600 1333MHz 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)