Corsair XMS2 TWIN2X4096-8500C5C 4 GB PC2-8500 1066mhz 240-pin DDR2 Dual Channel Desktop Memory The XMS brand family is Corsairs mainstream line of performance memory Two matched 2GB modules for use with AMD and Intel DDR2 systems Latency of 5-6-6-18 for maximum reliability and performance Industry Leading Lifetime Warranty 2 X 2GB PC8500 1066MHz 240-pin DDR2 Timing: 5-6-6-18 2.1v