I am using the Swiftech on my Striker Extreme 2 for the Chip and my 2 watercooled XFX 8800Ultra's. Absolutely love it. Reduced the video cards from 70 to 42 degrees. System is stable. QX 6600 OC to 3.5Ghz, air cooled ram, Mobo chipset not watercooled. I did by a second rad, but never used it...