I'm with craig588 concerning the heatpipe. Take it off and look at the blocks where the pipes are. They are squashed down and crammed in with some thermal past around it. Very poor design. Good idea, poor execution.

I'll post picks as soon as my coolers get here and I take the heatpipe back off so you can see what I mean. It's going in a Lian Li V2000 so I had no choice but to replace it. Unfortunately the spacing of the mounting holes and proximity of the video card limits your choice in a cooling solution.