Problem: Shutdown-Overheat=LED D1601. Shutdown @ startup mostly. Otherwise intermittent. Fan kicked into warp. The rest of system would continue to run.
New build: Asus P5Q turbo pro. Ati Radeon/Saphire/HD-4870. Vista Business 64 bit. 4 gigs corsair Ram. PSU Corsair 550watt. All components NEW. Solution: Borrowed card for another unit. Uninstalled everything associated with the ATI software. Found newer package on ATI site. Download & install. Replaced the 4870. Restart and PRESTO! Hope this helps some others.
New build: Asus P5Q turbo pro. Ati Radeon/Saphire/HD-4870. Vista Business 64 bit. 4 gigs corsair Ram. PSU Corsair 550watt. All components NEW. Solution: Borrowed card for another unit. Uninstalled everything associated with the ATI software. Found newer package on ATI site. Download & install. Replaced the 4870. Restart and PRESTO! Hope this helps some others.