I recently put together a new setup with the following hardware: A64 3800+, GA-K8NF-9, e-VGA 7900GT, 1GB PC3200, 1 SATA HDD, 2 optical drives, a 450W power supply from AMS, and 3 case fans. After some intial difficulty, I was able to install Windows XP. But the computer seems unstable and...