I bought the wrong CPU for my system... and it runs a little hotter than I'd like. The Fans run a little fast and louder than I would like.

I'm considering Undervolting my CPU and would like to test the system without the risk of an unclean shutdown messing with my array.

I have found the Atomic Burn test in CoreFreq, but is there any other protocol I should follow. My intent is to set the Voltage offset up and raise it until I start to have trouble and then back off a bit.

My system isn't running all that hot and so far it seems to be running fairly well. but I do dislike the extra noise and am incapable of leaving well enough alone.

Thanks

they make usb boots for things like runnign prime 95 that will force max the cpu ...

hiren boot cd runnign windows pe and runnign prime 95
I'm a fan of this PE distro of free software for widnows support:
https://www.hirensbootcd.org/

other prime 95 info:
https://www.infopackets.com/news/10113/how-fix-bootable-prime95-stress-test-hardware
https://forums.unraid.net/topic/29571-using-prime95-effectively/

Edited October 26, 2025Oct 26 by bmartino1

while in a pe you can run and use cpuz as well to get voltage data so prime 95 to stress test and cpuz to monitor voltages...

May also check the scaling on your mb fans. I've found some vrm and chipset fans to be pretty loud and throttling them down just a little can make a big difference.

I ended up running the linux prime95 directly in unraid... turning array autostart off... So far I've offset the power by 0.05 volts and it looks like it dropped the temps by 5 degrees.

0.075 results in a crash on a couple of the e-cores as soon as I started. I'm going to fine tune a bit to see if I can get the offset a little higher.

My fans are being controlled by the FanCtrlPlus plugin and I'm pretty happy with that... I wish I could shorten the response time to spool them up faster but during the Prime 95 runs my case internal temperature is only going up by about a degree and a half. The fans are almost inaudible at idle and ROARING at full speed. As they should be.

I tried bringing the offset up slowly and get a pretty reliable crash on worker 19, so I'll play with that a little later. I guess I could play with finding the right number for the Efficiency cores and then playing with just the Performance core offsets.

In the end it didn't really change the idle temperature at tall... It sits at 44 degrees which is only 5 degrees above my mainboard temps... Does that make sense?