Hey guys I have a MSI K8N Platinum. Currenly running a Sapphire x1950 Pro video card, via PCIe. I am looking to upgrade and my brother stopped by and hooked up with up a BFG 8800 GTS OC. So I installed it and my computer keeps locking up. My power supply is a Corsair TX750, so i know thats not the problem. I put the old card back in and it works fine.. Is there something im doing wrong???