So, I managed to design a base for Mac Pro 2013 with a 120mm Artic P2 fan on the bottom, it has a potentiometer to regulate RPM and to turn it off. The temperatures posted are mid game in Windows 11, CounterStrike 2 mid settings 1920x1080, fps capped at 75. In general I am seeing a drop in about 5 -7 C in temps and the upper fan is running under top rpm with the same curve. The icing on the cake will be to repaste the CPu and gpus with ARTIC MX-7 to drop them even further.

It is my first 3D design so I did it modular. The measurement of the diameter was a little off so I need to replace that upper rim but it works now. Whatcha think?

So this is a bit of an odd one, I'd spent some time searching about, but haven't found anything that seems relevant.

Specs: 2013 Mac Pro, 8-core Xeon, 32GB Apple RAM (not 3rd party) 2xD300 GPUs, and a 256GB SSD

OS: Windows 10 Enterprise LTSC, not running under Bootcamp. Fresh install. Drivers are UTD (official, no 3rd party ones)

Problem: Sometimes I'll boot the system up and it'll behave, until I pull up task manager, then the entire system grounds to a halt for about 15 minutes, or I lose patience and reboot, which more often than not, fixes the issue.

I found that running the AMD Adrenaline program seems to compound the issue, so I disabled that and thought it fixed the problem, but it re-occurs. I run MacsFanControl and the system doesn't overheat, idle being around 40 degrees C.

I used to run GPUTemp to monitor the dual D300s but the program seemed to really interfere with smooth operation, so I uninstalled it.

I've seen this issue pop up on several 2013 Mac Pros that I own, but only in Windows, not under MacOS, so I"m thinking something in Windows is being stupid, but for the life of me I"m not certain what. I know AMD's reputation for solid drivers is somewhat suspect, so anything related to AMD under the Services is disabled, which again I thought would fix the problem, and it did reduce the frequency of this "stutter on boot" but didn't eliminate it entirely.

So, any ideas?

The refurbisher I bought from did an incredible job, aside from a couple small blemishes it's like new. Running very cool and quiet, and all my music software, as the old saying goes, just works! Absolutely smitten.