Quote Originally Posted by millertime359 View Post
Most of the full cover blocks only ran water over the ram and GPU. The VRMs were passively cooled.

Alot of people use them here on GTX260s, 280s, 4870s, 4870sx2 and haven't had any issues.
There aren't issues unless you overvolt. At least with mine -- overvolting would result in 130-140*C VRM temperatures. Verified good mounting on both cards. Stock volts will load around 100*C. I'm very interested to find out if the new full cover blocks will have a water path to actively cool the VRMs.