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Problems after CPU Upgrade
- Thread starter tennisgot
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I know that the 3.2GHz models actually used a different logic board than the 2.8/3.0GHz models. I don't know if that actually matters, though.
Secondly, per Apple, the 3.2GHz CPUs use a different thermal compound (silver-based instead of normal paste) due to their higher TDP.
Secondly, per Apple, the 3.2GHz CPUs use a different thermal compound (silver-based instead of normal paste) due to their higher TDP.
No. It doesn't matter. Hexus.net did upgrade from 2.8 to 3.2 and it worked. I personally upgraded to 3.0 SLANT's, because of lower power consumption 80W instead of 120W.
Check diagnostic LED's - grab Apple Service Manual for Mac Pro 2008 and you will see what's wrong.
It's possible if you tightened those chips to tight, pressing the pins to much. Had this happen on a server I built. Otherwise, swap them or try one. Another thing to check is insure the contacts are clean and no burn marks.
suggest you put the other chips back in to insure there is nothing wrong. Those processors should work. Starting to wonder if you bought a bad set of chips. Do you know anyone with a harpertown rig to make sure the chips are good?
Upon further investigation, I found that this is a fairly common problem in the Hackintosh community. Their fix has been to move or rename the file /System/Library/Extensions/AppleIntelCPUPowerManagement.kext
Apparently this solution has worked on Macs with the same problem.
Obviously I don't take responsibility for what happens but I'd suggest you try boot your HD on another Mac and do the above change and try again.
Another thing to try in eliminating the problem is in fact removing the HD and trying to boot from an installation CD. If you get the same problem with the HD disconnected the solution above will make no difference.
If you can't even get to a boot disk the problem is in hardware or firmware settings.
Then I would try resetting all the acronyms you can think of, SMC/PRAM/PMU
Hope that helps.
Apparently this solution has worked on Macs with the same problem.
Obviously I don't take responsibility for what happens but I'd suggest you try boot your HD on another Mac and do the above change and try again.
Another thing to try in eliminating the problem is in fact removing the HD and trying to boot from an installation CD. If you get the same problem with the HD disconnected the solution above will make no difference.
If you can't even get to a boot disk the problem is in hardware or firmware settings.
Then I would try resetting all the acronyms you can think of, SMC/PRAM/PMU
Hope that helps.
Hello,
Today was another one started tentatively.
1. PM reset done without success
2. PRAM reset = no success
3. SMC reset = no success
4. Hardware Test CD will not start
5. I have not found diagnostic LED
6. HD expanded to boot from DVD. without success
It always appears the same error message. So I have again the 2.8 GHZ CPU's installed.
Thorsten
Today was another one started tentatively.
1. PM reset done without success
2. PRAM reset = no success
3. SMC reset = no success
4. Hardware Test CD will not start
5. I have not found diagnostic LED
6. HD expanded to boot from DVD. without success
It always appears the same error message. So I have again the 2.8 GHZ CPU's installed.
Thorsten
Returning the CPUs seems to be the only option, they may be faulty. Even if the seller says no returns, you should have a right to return them. Assuming you bought them from eBay, you can file a PayPal claim if the seller refuses to refund them.