Program Monitor Lags with Scaling & Position Changes - Scrubbing is FAST, Playback is Delayed/Laggy

[nicholas1234567]

I don't usually post on forums for help.. but this situation requires it. I can find nothing to help me with this issue, I've been searching for a week. I've tried all kids of stuff, it gets pretty weird. 

My system:

12900k

RTX 3090

64GB 4000mhz DDR4

4x 1TB m.2 SSDs (no HDDs)

Windows 11

The issue: 

When I change the scale/position of a video or image it freezes during playback, and when using the mouse to reposition something inside the monitor it's super super laggy. Primarily when increasing the scale or zooming in on something. What's weird though is that scrubbing over the footage is zippy fast. I can scrub and see each frame perfectly, even faster than playback speed. They're mp4 files, but I have tried creating a low res proxy and it does the exact same thing. 

Here's where it gets a little weird though... so after a few days of melting my brain on this I discovered that immediately after tabbing back into premiere, everything works perfect for 2-3 seconds! I can reposition something with the mouse and its smooth as butter!---

My GPU has a lot of coil whine (normal for Strix OC 3090) and I'm using an open air case. If I click and drag premiere or a detached panel around for a few seconds, I can hear the coil whine like it's working the GPU, then I quickly click back in and the coil whine continues for 2-3 seconds during which time it seemingly works perfectly! What the heck.... right? Like premiere decides not to use the GPU or something.

When I google it, all I get no matter the search is various ways to fix lag "10 Ways to Make Premiere Run Faster!!!!" and it's a little annoying to be honest. I have done every single optimization step known to premiere. 

Here's what I've tried to fix it:

- all Premiere optimizations in settings (clearing cache, selecting openGL/cuda, scale to frame, disabling transmit, reinstalling, clearing preferences, trying premiere beta, etc.)

- reinstall and fresh install game ready drivers

- reinstall and fresh install studio drivers

- re-seating the GPU 

- flashing latest GPU bios

- flashing latest motherboard bios

- enabling/disabling game mode

- enabling disabling HGPU Scheduling in Windows

- Manually selecting high performance mode/cuda in Windows and Nvidia Control Panel 

- disconnecting second monitor

- disabling gsync

- uninstalling various other programs

- disabling iGPU in bios

- creating a fresh "new user" in Windows and installing ONLY Premiere

- probably like 10 other things I'm forgetting lol 

 It seems to me like Premiere is refusing to use the GPU for scaling or something. Short of reinstalling Windows, I'm out of ideas. 

Please obi wan you're my only hope 

Vid showing the dragging panel fixes issue for 2-3 seconds - https://youtu.be/VEx__0vSXvk

[nicholas1234567]

Additional things I have tried:

- setting mic hardware input to no input

- reinstalling my motherboard's chipset drivers

[BURGANOV24177268to1w]

Have you fixed this error?

[nicholas1234567]

No. I think something happens within Premiere Pro's programming that makes it not fully utilize the 3D capabilities of the GPU when the program is full screen. I have tried a bunch of different settings within nvidia control panel and nothing fixed the issue. 

I will note that I temporarily switched to a 6900xt, and the effect was slightly less (the motion in premiere was less choppy), but it was still there. 

Hopefully a new driver or a premiere update makes things smoother.