Corsair 2GB 2x 240 DIMM non-ECC DDR2 RAM  (TWIN2X2048-9136C5D) DDR2 XMS2-9136 2x128Mx64non-ECC 240 DIMM, unbuffered 5-5-5-15, 64Mx8 DRAMS E.P.P Technology, matched with Dominator DHX technology