1GB KIT (2 x 512MB) For Dell Dell Dimension 4700 4700C 5000 5100 5100C 5150 (DM051) 5150C (DXC051) 8100 8200 8250 (400Mhz Bus) 8400 9100 9150 (DXP051) DM051 DV051 DXP01 E310 (DV051) E310n E510 (DM051) E510n E520 (DM061) E521 (DME521) 200 210 400 600. DIMM DDR2 NON-ECC PC2-4200 533MHz RAM Memory. Genuine A-Tech Brand. 1GB KIT (2 x 512MB) DIMM DDR2 NON-ECC PC2-4200 533MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Dell Dell Dimension. (See Compatibility List Below)