I flashed a reference nVidia GeForce GTX680 (no brand) with eVGA Bios inside my Mac Pro 4,1@5,1. It all works perfectly, but Mac Pro fans are noisy when system is cold even on Windows 7. The same happened when card wasn't flashed on Windows. If I run a game then exit it - it's all getting whisper quiet. I've heared that maybe flashing back to 4,1 will help this issue. Some of user recommended moving the card to slot 2 will help fix this problem. I've got my Areca RAID controller out there now and battery inside slot 3 and sound card inside slot 4. What would you recommend ?