Not comparable to my previous setup... But my PII X3 720 stays rather cool. These guys already incorporated the windtunnel effect I want to make into my mini-itx build. Basically the air gets sucked in and pushed out through the sidepanels. Only thing is I'm waiting on a replacement for the left sidepanel since the screw threads were garbled, which means I couldn't mount a fan even if I wanted to. The GFX, which is on the left side, gets a little warmer than it used to, but I used to have a fan blowing directly on it. Now this case has a lot more room than I thought, and it could be even more roomy if they made a couple of tweaks to the layout. If I ever get brave enough I'll be sure to mod it. Biggest downside is, though the entire case is pretty sturdy, thick aluminum, the top lid is fricking flimsy.