Frame Rate Hitching / Stuttering on PC 4090

I spent the entire day to get it running but nothing works for me. Beta and Server Slam was butter smooth but retail is stuck at ~5 FPS and occasional 60 fps for a few seconds.

Intel Core I5-13100F, AMD RX6600.
Windows 10 with latest updates
What devices are connected to your computer? Cable attached mouse, keyboard, 3.5 mm jack headphones
Overlay programs installed or running: None
Lower-level software that monitors running hardware/software: None
Streaming applications: None
Does the behavior change if Play in Background is enabled in Sound Options?: No
No overheating issues, running cool and CPU/GPU barely used

I tried all combinations of these:

  • Reinstalled game
  • Scan & repair game
  • Latest drivers 23.5.2
  • Downgrading to 23.5.1
  • Downgrading to 23.4.3
  • Power plan: High performance
  • Cleared shader cache
  • AMD Adrenalin factory reset
  • AMD Adrenalin full reinstall + cleaned drivers
  • Made sure network profile is set to Public (It was already, also tried Private and back again)
  • Disabled IPv6
  • Reinstalled network card
  • Removed firewall rules so they get recreated (tcp+udp)
  • Created firewall rules manually
  • Disabled firewall
  • Disabled antivirus (Defender)
  • SSDP Discovery and UPnP Device Host, already stopped
  • Killed the only program running in background (Google Drive)
  • Spatial sound disabled
  • Selecting the Sound device ingame instead of “Default”
  • Disabled onboard sound
  • Disabled the sound card completely: Monitor (AMD High Definition Audio)
  • Disabled the sound ingame
  • Unchecked browser hardware acceleration in battle.net
  • Killed battle.net from running in the background
  • Run on the lowest settings
  • Windowed/Windowed fullscreen
  • Delete/recreate \Documents\Diablo IV\LocalPrefs.txt
  • Disabled ingame voice
  • Removed all hidden devices from Device manager (dropped Polling audio devices complete. Found: from 40 to 14)

I can not get rid of the Polling audio devices that spams several times per second endlessly.

| 2023.06.02 15:36:16.964491|[Game] [wWisePlatform] OnAudioDevicesChanged from Process DeviceEvents|
|---|---|
|I 2023.06.02 15:36:16.964501|[Game] OnAudioDevicesChanged|
|I 2023.06.02 15:36:16.964504|[Game] RefreshAudioDevices|
|I 2023.06.02 15:36:16.964507|[Game] [wWisePlatform] Start polling audio devices.|
|I 2023.06.02 15:36:16.981185|[Game] [wWisePlatform] Polling audio devices complete. Found: 14  Default: 'Default'|
|I 2023.06.02 15:36:16.981194|[Game] [wWisePlatform RefreshAudioDevices] Raising OnAudioDevicesChanged notification|
|I 2023.06.02 15:36:16.981201|[Game] [wWisePlatform RefreshAudioDevices] OnAudioDevicesChanged Complete|
|I 2023.06.02 15:36:17.060147|[Game] [wWisePlatform] OnAudioDevicesChanged from Process DeviceEvents|
|I 2023.06.02 15:36:17.060156|[Game] OnAudioDevicesChanged|
|I 2023.06.02 15:36:17.060159|[Game] RefreshAudioDevices|
|I 2023.06.02 15:36:17.060161|[Game] [wWisePlatform] Start polling audio devices.|
|I 2023.06.02 15:36:17.082794|[Game] [wWisePlatform] Polling audio devices complete. Found: 14  Default: 'Default'|
|I 2023.06.02 15:36:17.082803|[Game] [wWisePlatform RefreshAudioDevices] Raising OnAudioDevicesChanged notification|
|I 2023.06.02 15:36:17.082809|[Game] [wWisePlatform RefreshAudioDevices] OnAudioDevicesChanged Complete|

Nothing works! Completely unplayable!! :cold_face: