Hello,
I am hoping someone can help as this problem has me scratching my head.
I have a dual processor Mac Pro 4,1 that originally had dual e5520 CPU’s.
I have updated the firmware (and rom) to make it a 5,1. I have installed two de-lidded x5680 CPU’s. System booted up fine with original dual CPU’s.
i have been very careful with the sockets to ensure there are no bent pins, none! Checked meticulously with a magnifying glass.
Both new x5680 CPU’s work in Socket A, with one 16GB sodimm, but, when I install the second CPU in Socket B the system comes on without boot chime and fans running full speed, like warp speed! From reading, I know that is a symptom of CPU-B not being installed properly.
I have adjusted the screw pressure for CPU-B and even had the system come on but just show that it only has one CPU in the system.
I have modified CPU-B’s heat sink fan connector to properly seat itself, and now the system turns on, still without a chime or boot screen, BUT, then fans do not come on at warp speed. It sounds normal now... I feel I am close, just unsure if CPU-B need a little less tightening.
Since the CPU’s are de-lidded all that I used was the original CPU’s plastic spacers and tightening to just hand tight, no over tightening.
I have switched back to the original e5520 CPU’s and the system boots up without a problem.
I switched back to the new x5680 CPU’s and same issue I have described as above persists. I have tested both x5680 CPU’s in socket-A one at a time and they boot up without a hitch. I have run some cpu benchmarks for an hour with each single x5680... no issues. When I put a second x5680 cpu in socket B, same issue as described above happens.
For now I have re-installed the original CPU’s and the only thing I can think of is that the processor board does not like the higher wattage x5680’s.
I may purchase x5675 CPU’s since they are nearly identical in power consumption to the original CPU’s. That is the only thing I can think of.
Any tips or guidance would be appreciated for those that have updated their dual MP de-lidded CPU’s. I have used the search function, read posts with some depressing results where people gave up, and also read a tonne of posts on here, Facebook forums, Netkas, Etc.
This one is driving me batty!
Thanks!
I am hoping someone can help as this problem has me scratching my head.
I have a dual processor Mac Pro 4,1 that originally had dual e5520 CPU’s.
I have updated the firmware (and rom) to make it a 5,1. I have installed two de-lidded x5680 CPU’s. System booted up fine with original dual CPU’s.
i have been very careful with the sockets to ensure there are no bent pins, none! Checked meticulously with a magnifying glass.
Both new x5680 CPU’s work in Socket A, with one 16GB sodimm, but, when I install the second CPU in Socket B the system comes on without boot chime and fans running full speed, like warp speed! From reading, I know that is a symptom of CPU-B not being installed properly.
I have adjusted the screw pressure for CPU-B and even had the system come on but just show that it only has one CPU in the system.
I have modified CPU-B’s heat sink fan connector to properly seat itself, and now the system turns on, still without a chime or boot screen, BUT, then fans do not come on at warp speed. It sounds normal now... I feel I am close, just unsure if CPU-B need a little less tightening.
Since the CPU’s are de-lidded all that I used was the original CPU’s plastic spacers and tightening to just hand tight, no over tightening.
I have switched back to the original e5520 CPU’s and the system boots up without a problem.
I switched back to the new x5680 CPU’s and same issue I have described as above persists. I have tested both x5680 CPU’s in socket-A one at a time and they boot up without a hitch. I have run some cpu benchmarks for an hour with each single x5680... no issues. When I put a second x5680 cpu in socket B, same issue as described above happens.
For now I have re-installed the original CPU’s and the only thing I can think of is that the processor board does not like the higher wattage x5680’s.
I may purchase x5675 CPU’s since they are nearly identical in power consumption to the original CPU’s. That is the only thing I can think of.
Any tips or guidance would be appreciated for those that have updated their dual MP de-lidded CPU’s. I have used the search function, read posts with some depressing results where people gave up, and also read a tonne of posts on here, Facebook forums, Netkas, Etc.
This one is driving me batty!
Thanks!