I know there is a difference in cpu temps between A and B in almost all Mac Pros I had on my hand.
But I have an 4,1->5,1 that I'm playing with different CPU pairs, lidded/delidded etc...
The difference on A/B is about 5-6c degree at idle and more than 10c at full load stressing.
Also I touched both heatsinks and B is not very hot, almost lukewarm but Heatsink of CPU A can't be touched more than few seconds without getting burned.
Checked fans, and boostA and boostB are on the same RPM level (about 1300-1400rpm) when stress testing but the difference seem so much more.
Also I exchanged the CPUs between A-B slot and even tested another pair of the same X5675 and it all times A is much more hotter than B to the point of lukewarm B and burned finger after few seconds A.
Any thoughts? Is there a way to lower the Temp of slot A ?
In the picture you can see the sensors when stress testing, and in that iteration I use delidded CPUs in both slots, Slot A has arctic MX-2 paste Slot B has a generic white thermal paste that I use for general electronics requirements (power transistors, mosfets, etc...)
I have even tried delidded CPU A and lidded CPU B with the same results, and I've found out that lidded vs dellided has almost no effect on the temps
But I have an 4,1->5,1 that I'm playing with different CPU pairs, lidded/delidded etc...
The difference on A/B is about 5-6c degree at idle and more than 10c at full load stressing.
Also I touched both heatsinks and B is not very hot, almost lukewarm but Heatsink of CPU A can't be touched more than few seconds without getting burned.
Checked fans, and boostA and boostB are on the same RPM level (about 1300-1400rpm) when stress testing but the difference seem so much more.
Also I exchanged the CPUs between A-B slot and even tested another pair of the same X5675 and it all times A is much more hotter than B to the point of lukewarm B and burned finger after few seconds A.
Any thoughts? Is there a way to lower the Temp of slot A ?
In the picture you can see the sensors when stress testing, and in that iteration I use delidded CPUs in both slots, Slot A has arctic MX-2 paste Slot B has a generic white thermal paste that I use for general electronics requirements (power transistors, mosfets, etc...)
I have even tried delidded CPU A and lidded CPU B with the same results, and I've found out that lidded vs dellided has almost no effect on the temps
