16GB KIT (4 x 4GB) For Dell Precision Workstation Series 470 470n 670 670n. DIMM DDR2 ECC Registered PC2-6400 800MHz RAM Memory. Genuine A-Tech Brand. 16GB KIT (4 x 4GB) DIMM DDR2 ECC Registered PC2-6400 800MHz 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)