Hi Robo ... sorry I've been away for a while
The best thing to do is get yourself a good heatsink... this is the thing that takes the heat out of your CPU ... I'd recommend the Thermalright SLK800 ... although this is a heavyweight (both in terms of weight and cost) but it works ... and also the Thermaltake Smartfan2 as my setup. These do make the difference.
You can go for a lesser sink tho, but with the effort you seem to be putting your CPU through, I'd err on the side of caution and get a good one.
Also ... have you enough case cooling? I'd recommend an intake and exhaust fan, and also tidy the wires within the box ... airflow can be severely restricted by all the tangle of wires. I think I've put some links to guides on the site. I'll try to make some time and find them for you.
Hope this is sufficient for you to start counting your pennies