A recent change broke multi-threading for my PC

I am not sure what has occurred behind the scenes, but a recent change has made multi-threading with my PC into a stutter step frenzy.

When I disable multi-threading I get a stable 20-23ms CPU usage at all max.

When I enable multi-threading my CPU usage spikes from between 18-200 rapidly and stutters the hell out of my game. This does not improve even when I turn everything to the worst settings.

This was previously not an issue and my PC could run everything at max with zero issues despite being an old server.

A temporary, MIND BAFFLING fix, is to play a youtube video on my second monitor. The cpu usage then goes between 7 ms and 20sh ms and is a stable 60fps.

I would very much like to keep my smooth as butter experience WITHOUT being required to have youtube randomly running for no apparent reason on my second monitor, so support for this would be greatly appreciated.

I found the bizarre help for this from an old thread.
https://www.pathofexile.com/forum/view-thread/3233636/page/2#p25281069

Since the solution for whatever reason involves running MORE programs, the issue clearly isn't with our PC's. My blind dartboard guess is that when too much CPU power is available for multi-threading it's freaking out for some reason.

As far as I can tell none of these other users got their issue resolved.

Please address & help.

So after looking around, the solution that has worked consistently was this one.

Video Link Explaining
https://www.youtube.com/watch?v=9_L0VdQFQbc
Direct Reddit Thread
https://www.reddit.com/r/pathofexile/comments/t1d01u/performance_guide_secrets_of_stuttering_how_i/

Literally creating power settings to force the CPU's to not sleep because apparently them turning on and off is the problem because the game isn't optimized for multi-threading.

FPS is intolerable without it but downright unplayable with it unless I either run enough extra programs to keep cores awake or prevent them from sleeping outright.

This issue has been present since 2017 at a minimum based on the above referenced forum post.

There has to be a fix, some players have apparently outright quit the game because of these issues. Surely some of the new PoE2 backend has solutions for this?

The issue seems to happen to a few more people after major patches like this specifically. I really hope this issue is fully murdered when we migrate to PoE2 backend.

For anyone else that has this stuttering issue. You can either follow the above instructions or:
- Run a youtube video on your second monitor
- Run a second poe client parked at start screen, adjusting fps for idle game from settings
- Run a second / third game that is semi demanding

For the meme's
- Run multiple windows of hourly length rick astley videos boxed side by side, adding boxes until frames stabilize. Upon stabilizing, send screenshots to GGG showing how many rick astley's are required to run PoE.