Corsair 2GB DDR2 800 M Hz/PC2-6400 XMS2 Xtreme Performance Memory The CM2X2048-6400C5 G is a 2048 M Byte DDR2 SDRAM DIMM. This part delivers outstanding performance in the latest generation of dual-channel DDR2-based motherboards. It has been tested extensively in multiple DDR2 motherboards to ensure compatibility & performance at its rated speed. This memory has been verified to operate at 800 M Hz at the low latencies of 5-5-5-18.