Well I came across this thread right now, and thought I'd add my 2cents to this. After running a freezone on my quad cpu for roughly 4 months here are the results!. I had originally been running it on a x6800 with no problems, then upgraded to a qx6700, that's when the freezone told me.. uh no!, And decided to wash my system with coolant.
I've been in contact with coolit's tech support and after many back and forth call's and emails "most calls not returned I might add!', they have sent me one of there newer units fitted with norprene tubing. Now will I use it? I dunno.. it's still sitting here in the box. In fact once I recieved the new unit I called tech support to ask a question. Left my number and once again.. no call back. Tempted to but unsure after that mess it left me with. So well see..
Some damage shots for your viewing enjoyment!.