4GB kit (2GBx2) DDR2 PC2-5300 DESKTOP Memory Modules (240-pin DIMM, 667MHz) Genuine A-Tech Brand 4GB kit (2GBx2) DDR2 PC2-5300 DESKTOP Memory Modules (240-pin DIMM 667MHz) Genuine A-Tech Brand Lifetime Warranty! 240-pin DIMM 667MHz Toll Free Technical Support