I've just finished watercooling my prescott, and it seems to run too hot, considering what I have. I have 3.4E overclocked to 4 GHz. I'm running 1.55v actual (1.5 under load). This is on an Abit AS8. According to the AbitEQ, it runs around 45-50c at idle, and 60-65c under 100% load (dual prime95). I know the IS7 and IC7 mobos temp sensor was about 10 degrees off, but I don't know if that's true with the 775 socket boards. Even if it is 10 degrees high, doesn't 55c under load seem high? I'm running 1/2 ID tubing and Dangen Den 12v pump (Laing D4). The water block is a TDX, and I have a Maze 4 for my radeon. The heatercore is the 77 b-ville with two 120 mm fans. I've reseated the block, without much luck. What kinds of temps are others getting with these prescotts?