CORSAIR TWIN2X4096-6400C5 XMS2 series 4GB ( 2GB x 2 ) 240-pin DDR2 800mhz non-ECC desktop memory module 1-Year Mfg Warranty Corsair TWIN2X4096-6400C5 CORSAIR TWIN2X4096-6400C5 XMS2 series 4GB ( 2GB x 2 ) 240-pin DDR2 800mhz non-ECC desktop memory module