Huge number of Premiere Errors/crashes without any fix...

One other thing you can try before a clean reinstall of Windows. A clean install of Premiere Pro. Use the Adobe Creative Cloud Cleaner tool, and then reinstall. Here's a link:

https://helpx.adobe.com/creative-cloud/kb/cc-cleaner-tool-installation-problems.html

My 2011 machine (desktop) had 16Gb, but I doubt that is the problem. You might want to test the memory. I did have a bad chip on my current build I found via MemTest:  https://www.memtest86.com/

Did you upgrade your video card directly from the nvidia site?

Don't forget this guy: (This is just a picture, use the one under your original post)

I'm not sure. Maybe someone else might have an answer. Your computer will run alot better with less processes running. Especially as you are on the lower end of memory. You're original list of all the things you've tried is fairly extensive, so what else is the answer? I don't know much about Quadro's other than they seemed to be the standard at one time, but I think the regular GeForce's have caught up and there is a lot more data available for them, as there are so many users out there. So, rather than concluding your hardware is incompatible, I was thiking about your OS.

That is a lot! That SSD sounds new, so you might not mind trying another Windows CLEAN install, that's what I would suggest. Of course you need backups of all your data, etc.

I would try with MS image. Here's the page: https://www.microsoft.com/en-us/software-download/windows10

You can create a bootable USB drive. Install the bare minimum to get things working, and use the Microsoft drivers where you can.

Don't install any dell software. People have reported generic / strange issues and it turns out to be the audio driver, or some audio program the manufacture installs. Dell, Asus, etc... Start as light and generic as you can get, then install PP and see what you have. If it works you can start installing other things you may want, constantly going back to PP and make sure it still works. That's all I can think of at the moment.

I often monitor the task manager tab to see how my PC is doing. The only thing that usually gets up quite high is RAM and CPU when rendering. But yeah there are a lot of processes

Just curious, what does your Task Manager screen / Performance Tab look like. Dell typically adds tons of processes to their OS. Here's what mine looks like shortly after booting. (Each process steals a little bit (or more) processor time reducing overall performance)

The continuing audio could be a performance issue. What media is involved? Are you using proxies? I was asking about the Windows media you 'reinstalled' from because Dell used to load up a bunch of undesireable software and applications on their delievered operating systems. It's been a long time since I purchased a Dell, but a clean install, and loading as few as possible Dell drivers and software would be a good thing.

These issues have been occuring in every project including new ones. Anytime the project gets even a bit demanding for my computer i get one. My prgram monitor often freezes or is grey/black

Did you try a new project? Is it an ongoing project you need to work on? If so, try importing that into a new project and testing it out.

How about some of the other problem. It looks like your Program Monitor was displaying grey in one of the pictures?

You may need to remove and reapply that Lumetri effect at the noted timecode.

Further issue where i have paused the sequence, the program screen is frozen and the audio is continuing to playy