8GB KIT (4 x 2GB) For Dell Precision Workstation Series 380n (Non-ECC) 390 (Non-ECC) T3400 (Non-ECC). DIMM DDR2 NON-ECC PC2-5300 667MHz RAM Memory. Genuine A-Tech Brand. 8GB KIT (4 x 2GB) DIMM DDR2 NON-ECC PC2-5300 667MHz 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)