The Twin2X4096-6400C5 is a 4096MByte matched pair of DDR2 SDRAM DIMMs. 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 and performance at its rated speed. This memory has been verified to operate at 800MHz at the low latencies of 5-5-5-18. Corsair's line of 4GB memory kits is designed for PCs featuring 64-bit operating systems.