So I recently sold a 4,1/2009 CPU Tray to someone and the fans are running full tilt.
I have verified the SMC version of the tray and the system and they match. Both are version 1.39f5. The Mac Pro is a 4,1 flashed to 5,1 and the tray is out of a 4,1 as well.
I know the usual suspect for fans running wild is a mismatch of tray and system, but that is not the case here. I had him install Mac Fans Control and he was able to manually slow the fans down, but that is no long term solution.
Here is some additional background on the tray. Pulled it from a working system, upgraded it to dual x5690s (delidded the CPUs myself) and then tested it for a couple of days, everything seemed good. Pulled it from the system until it sold and then put it back in to make sure it was working before I shipped it. I did notice that when I pulled it out to ship it, one heat sink was very warm and they other was cool. I remember reading that the downstream heat sink is going to be much hotter, but the upstream one was cooler than I thought it would be. Don't know if that is a red herring or not.
I'm attaching some photos of the Mac Fans Control before and after slowing the fans down. The fact that it is responding to manual adjustment of the fan speed seems to tell me that the fans are connected properly. The system recognizes both CPUs, so I would think that my heat sink torquing went okay.
Here are the things we have tried:
1. Reset PRAM
2. Unplugged the machine for a couple minutes to reset the SMC
3. Reseated the RAM (1333MHz), one stick in slot 1 and one stick in slot 5
4. Pulled the tray and reseated it.
5. Putting his old tray in results in everything working fine.
I don't know what else to try and might have to let him return it and give him a refund.
Thanks in advance for any help!
I have verified the SMC version of the tray and the system and they match. Both are version 1.39f5. The Mac Pro is a 4,1 flashed to 5,1 and the tray is out of a 4,1 as well.
I know the usual suspect for fans running wild is a mismatch of tray and system, but that is not the case here. I had him install Mac Fans Control and he was able to manually slow the fans down, but that is no long term solution.
Here is some additional background on the tray. Pulled it from a working system, upgraded it to dual x5690s (delidded the CPUs myself) and then tested it for a couple of days, everything seemed good. Pulled it from the system until it sold and then put it back in to make sure it was working before I shipped it. I did notice that when I pulled it out to ship it, one heat sink was very warm and they other was cool. I remember reading that the downstream heat sink is going to be much hotter, but the upstream one was cooler than I thought it would be. Don't know if that is a red herring or not.
I'm attaching some photos of the Mac Fans Control before and after slowing the fans down. The fact that it is responding to manual adjustment of the fan speed seems to tell me that the fans are connected properly. The system recognizes both CPUs, so I would think that my heat sink torquing went okay.
Here are the things we have tried:
1. Reset PRAM
2. Unplugged the machine for a couple minutes to reset the SMC
3. Reseated the RAM (1333MHz), one stick in slot 1 and one stick in slot 5
4. Pulled the tray and reseated it.
5. Putting his old tray in results in everything working fine.
I don't know what else to try and might have to let him return it and give him a refund.
Thanks in advance for any help!
