5770 and 5870 in Mac Pro 2009 - noisy PCIe expansion bay fan
I have sent the 5770 back to Apple. I am considering to try the 5870, but I am afraid I will be in trouble again.
With the GT 120, the fan speed is only 800 RPM and the Mac is silent. The ATI Radeon cards require one or two power cables connecting to the logic board.
Could that be the cause of the problems or was the 5770 a bad card? Or is it the logic board. I ran the Apple Hardware Test. everything was OK.
I checked it with Techtool Pro and there were no problems found.
Any help would be much appreciated. I have zapped the PRAM and reset the SMC without result.
Kind regards and thanks of reading.
Mac Pro Quad 2.66 Nehalem 2009., Mac OS X (10.6.5), OWC SSD + 12 GB RAM