3.27 persistent microstutter and weird Procmon log

in 3.27 i'm having major microstutter (on both dx12 and vulkan), never had something like this before. seemed weird to me as i've actually upgraded my psu and gpu recently

ALSO - when game is focused, fps starts fluctuating. when game is in the background, it's ROCK SOLID

screenshot of procmon telling me poe process tries to open non-existent registry key for a device, and does it INSANELY frequently
https://ibb.co/pBkVDMgj

specs (all oc/uv stable, and i mean actually stable not "passes 5 min occt"):
cpu: 13900k 56pcore/42ecore
ram: ddr5 6600 with tuned secondaries/tertiaries
psu: corsair rm850x 2024
gpu: 5070ti
windows, drivers: latest updates applied
no led/peripheral software running
latencymon shows sub 800microsecond driver dpc execution time as highest spikes, isr sub 200 microseconds, interrupt-to-process sub 400microseconds

it's just poe having issues, everything else works like a dream

checked with minimum/all devices enabled (it does)
checked if this occurs with cfg disabled (it does)
checked with full/minimum services running (it does)
checked with/without regular 3rd party apps browser, discord, etc running (it does)

it might be just that weird registry call that stalls game process