Perfomance Issue since newest Patch - possible multithreading error

Hey there GGG team and exiles,

I, like a lot of people it seems, am running into massive lag and performance issue. I haven't played since before Exile Con so i can't determine when this started but my guess is with the latest patch. It was "fine" before exile con.

I have tried a few different things and hope that this might help pinpoint the issue.

This is the system I started with:

CPU: Intel Core I7 3,4 Ghz
Ram: 16 Gb Kingstone ddr3 1600
Graphics Card: Nvidia 1050Ti 4Gb
Sandisk Ultra II ssd
Network Card: Killer K1
Soundcard: Creative X-Fi sounblaster
Mainboard: Gigabyte G1 Sniper 2
Operating system: Win 10 Pro

TLDR:
Swapping components, changing power management settings or graphics or sound settings didn't help.
Setting the Engine Multithreading to disabled removed the lag issue as far as I can tell. But it also drops the overall performance to 40fps while standing still in my hideout.

Description of the issue:
Massive lagspikes and performance issues especialy with mobs and dying mobs on screen. Error persists in hideout, Maps, MAIN MENU AND LOGIN SCREEN! Yes I can see the torches lagging and stuttering.

I tried/did the following with no perceived influence on the issue:
Made sure it is not my networking by swapping to wlan for a try and changing carrier of my connection.
Made sure all drivers are up to date.
Checked the system temps just for sanity.

Changing the graphics details
Changing the renderer
Changing display mode
Deactivating the sound
Swapping the GPU for a MSI1080 8GB
Reinstalling the graphics driver
Swapping the harddrive to a samsung 860 evo 1tb
(note i didn't re download POE rather copied the ggpk and ran the installer!)
Changing the OS from Win 10 pro to a fresh install of win 10 pro atlas, so no i don't think its a windows service or update thing.
Changing the Power behavior and energy settings for both system Configurations.
(Including setting the Cpu minimum processor state to 70%; 98% and 100%)


This helped, but brought my average FPS to a crawl, understandably:
Disabling the Engine Multithreading under Advanced settings.
this worked with both system specs and both operating systems
this also works with different graphics settings and renderers
This is the system config i will use going forward:
same as above but with the 1080 8GB card and the Samsung 860 evo drive.

HWinfo64 screenshot:

Multithreading disabled in hideout with minions running around:



Multithreading enabled in hideout with minions running around:



Multithreading enabled reentering a map that had spikes all over but with no mobs or minions in sight, I thought that is curios so i added it:



Things i didn't check:
Give POE just one or less than all CPU core via task manager or command instead of deactivating Multithreading.

Hope this helps, I will try to come back to this for questions as much as possible.

Stay sane Exiles!
TrueOGer

Probably C-states issue, i had that after perfomance patch aswell.
This will probably help you, tho managing power plans is quite annoying
https://www.reddit.com/r/pathofexile/comments/t1d01u/performance_guide_secrets_of_stuttering_how_i/

@Moonlight666X Sir! Thank you! This actually worked. I have no idea how you recognized this or how someone gets to this solution but praise be to you for suggesting this.

Update to the situation and possible solution for others:

Moonlight666X's solution worked, at least for me:
https://www.reddit.com/r/pathofexile/comments/t1d01u/performance_guide_secrets_of_stuttering_how_i/
Deactivating C states like described in the reddit post removed the Cpu lag/stuttering with Multithreading enabled.

With Multithreading enabled and C-states disabled in Hideout:
corresponding HWiNFO64 Core c0 residency below




With Multithreading enabled and C-states at default in Hideout:
corresponding HWiNFO64 Core c0 residency below

Yep ! I was having the same issue after the most recent patch, found this fix today and after turning off C states for my CPU the game is buttery smooth. Hope this gets fixed