Corsair 2GB (1x2GB) DDR2 667 MHz (PC2 5300) Desktop Memory 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! 2GB PC5300 667Mhz 240-pin Timing: 5-5-5-15