The Twin 2X2048-6400C5DHX is a 2048 M Byte matched pair of DDR2 SDRAM DIMMs built using Corsair’s latest high performance heat sink with Dual-Path Heat Xchange (DHX) technology. 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. 2048 Megabytes of DDR2 memory Two matched CM2X1024-6400C5DHX modules Unique DHX technology providing maximum cooling 100% tested at 800 M Hz in high performance DDR2 motherboards Lifetime warranty