Cooling system improvement

Yesterday, I played Oblivion as usually, when I played about half an hour, I hear beeping. Yes it was the temperature alarm... How can by the processor overheated, I have there the biggest heatpipe cooler I can buy (Noctua NH U-12) and 12cm fan on it. So I though something is wrong with the case. And I was right, the case was pretty closed and the cable management inside was horrible. It looked ugly:



I decided to do something with it, I wanted to improve the airflow in case. So I grab the tongs, bent the metal on the back of case. Now can the hot air go out of the case without any barriers.
Then I made a hole for system fan. But I'm not a professional metal worker, so the result isn't so nice as it could be, but it's efficient. So the back of case is modified. Now the cable management. It's important, that nothing is in the flow of air. I moved the cables to the side of case, so there is some "tunnel" for the air, now. The "new" case is at the pictures below.



And what's the result? The temperature goes down by 10°C. So it's not very nice (the metal work), but it's efficient :DDD Now I have a big hole, in front of my case, so I need to modify the panels, that will be under the DVD.