Corsair 2GB (2x1GB) DDR2 667 MHz (PC2 5300) Desktop Memory (VS2GBKIT667D2) Each memory module is individually tested to give you Peace of Mind that it Will Not Fail, Guaranteed! Online 24/7 Customer Support available at www.asktheramguy.com for your convenience and questions Corsair Memory is optimized for the Microsoft Windows Vista client operating system Lifetime Warranty! 2 X 1GB PC5300 667Mhz 240-pin Timing: 5-5-5-15