Yes, the frametime multithreading bug is in PoE2

For context: https://www.pathofexile.com/forum/view-thread/3408520

Frame-spiking tied to CPU usage -> Open Picture-in-picture Twitch/Youtube stream -> Smooth as butter

If you're having very low FPS try the above. If you don't want to PiP, having OBS doing a replay recording works somewhat.

Who knew that this would continue to be this engine's final boss?

Had to refund because of this.

Playing a video didn't help me much, only disabling engine multithreading or cstates helped out, but both are poor workarounds.

I am on steam and no matter what I do (make sure it doesn't use onboard gpu etc.) I am stuck at low fps, talking 30-45. I have a 3070 and an i5-11600k, 16gb ram. By no means the best PC out there, but it should be giving me at least 60 stable fps, no?

I may have to refund as well if this doesn't get resolved soon.

Possible solution for game FREEZES and system reboots:
1) Update latest chipset drivers and BIOS for your motherboard. (be very careful with BIOS update watch guides or use help of experienced tech guys)
2) In BIOS settings DISABLE for ASUS-"Multicore enhancement", for MSI "Enhanced Turbo", for GIGABYTE "Tweaker tab, Enhanced Multi-Core Performance".
3) Clear AMD/Nvidia shader cache. (just google it)
4) DISABLE dynamic culling in game options.
5) Turn off Nvidia Reflex in game options.
6) CLOSE all your browsers and their processes in your system before playing the game.
7) Steam - right click on PoE2 - properties - General tab - Steam Overlay switch OFF.

!!! OR !!!
"Zarasi#7652 wrote: use BES CPU Limiter to reduce what PoE can use by a few percent so it can't hit 100% CPU, and I've not had any further issues.
For BES steps if you want to try it out:

1. Download BES CPU Limiter.
2. Unzip it, and run the .exe.
3. Launch Path of Exile 2 and stay on the log-in screen.
4. Go back to BES, and press the "Target" button.
5. Find pathofexile.exe in the list, select it, and press the "Limit this" button.
6. Set the slider at the bottom of BES between -2% and -5% (I would recommend -5%).

The task bar icon for BES should turn into a red square, Path of Exile 2 should be coloured in orange in the list inside BES, and it should say "Foe". See here for an example. Try anything between -2% and -5% (as mentioned I'd recommend -5% as -2% may not be enough to stop the system freeze)."

"Possible solution for game STUTTERS:

1) Update latest chipset drivers and BIOS for your motherboard. (be very careful with BIOS update watch guides or use help of experienced tech guys)
2) Clear AMD/Nvidia shader cache. (just google it)
3) Do NOT change NVIDIA control panel settings for PoE2.
4) Do NOT disable Full screen optimization in EXE files of the game.
5) CLOSE all your browsers and their processes in your system [in my case opened Chrome cause stutters every 2-3 seconds]
6) Turn OFF NVIDIA Reflex in game options tab.
7) Steam - right click on PoE2 - properties - General tab - Steam Overlay switch OFF.

Info for devs - mostly problem located in working browsers IDK how this correlate with PoE2 performance but it is!"