Premiere Pro 2023 Playback Lag and Slow Export

[Strategywizard]

My video playback is laggy without dropping to 1/2 playback resolution, even with very basic edits (adding text with a fade in and out opacity effect).  Anything more than that, and it's just horrible.  I can't see the effect in action because it lags so badly.

I've been on chat support with Adobe, and they tried lots of things.  I updated my Nvidia Studio Driver, then dropped it to a lower version.  Neither worked.  Settings were changed, Premiere Pro was re-installed with the Creative Cloud Repair Tool, and nothing has made a significant change.  This issue feels like it happened within the past few months.

Here are my system specs:

Windows 11 Home Edition

Version 10.0.22621 Build 22621

Alienware Aurora Ryzen Edition R14

AMD Ryzen 9 5900 12-Core Processor, 3001 Mhz

128 GB RAM

Over 1 TB of C Drive Storage Available

NVIDIA GeForce RTX 3080

Studio Driver Version 531.41

If any other information would help, please let me know.  I'm a relative noob at Premiere Pro troubleshooting and operation.

[Strategywizard]

In fact, the export I just tried failed.  This was a 20 minute video, but it took over an hour to export.  Then the audio was the only aspect that exported.  In case this makes a difference, I am editing video and photos from my Samsung A Series phone.