You might want to consider adding a larger Heatsink to the PPC chip, when I had a CSPPC card it used to overheat and lock-up under heavy PowerPC use, and that little stock heatsink is really inadequate, even during British winter time
I fitted something like this to mine, it clipped straight on (carefully) with 2 clips, then glued a 40mm fan onto the top.
http://www.zalman.co.kr/eng/product/view.asp?idx=71&code=014Robert
