2GB KIT 2 x 1GB Dell XPS Desktop Series 200 DXC051 210 DXC061 400 DXP051 410 DXP061 420 630 630i 700 DXG061 710 720 H2C 9150 One One 20 DIMM DDR2 NON-ECC PC2-5300 667MHz RAM Memory 2GB KIT (2 x 1GB) 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 XPS Desktop Series. (See Compatibility List Below)