I'm having problems with the fan of my ATI 5870 card (sometimes the fan doesn't start rotating when starting up, causing the Mac to panic due to overheating). After searching a bit, I found out that to fix the fan, I will have to open the whole card, which means using thermal pasta... (I'm a bit afraid of that) I was now looking for another graphics card, and the Sapphire HD 7950 seems popular for Mac Pro's (and actually seems really cheap). The only problem is that I want to keep the bootscreen. So I will need to flash the 7950 card. Is it common that people brick their card while doing so or isn't it too hard? Or shouldn't I flash the card, but use a cheap "real" Mac card for the bootscreen?