Is it time to upgrade my Ryzen 9 3900X and 3080 rig or fix it?

Your rig should still hold up pretty well! Check your motherboard's BIOS for updates and make sure you have the latest AMD chipset drivers. Also, if you're primarily gaming, consider disabling SMT to boost performance on fewer threads. Run some benchmarking tests to compare your scores against similar setups.

Your slowness might be due to OS bloat and background apps. A fresh install of Windows from a bootable USB could be more effective than a hard reset. There might also be issues with storage drives, so using CrystalDiskInfo to monitor your drives could help track down any potential problems.

Have you tried just restarting it lately? Sometimes that simple step can bring back performance!

Definitely check for dust buildup and do a deep cleaning of your PC. Sometimes just cleaning can prevent thermal throttling which slows things down. Also, consider a fresh Windows install for better performance.

A clean Windows install instead of just a reset could really help speed things up. Trust me, I've been there!

Without seeing your exact specs, I'd say your rig probably just needs some TLC. Be sure to check if XMP is enabled, give your PC a good dusting, and consider reapplying thermal paste to your CPU. Sometimes a fresh Windows install can do wonders too, since corrupted files can slow things down. Cleaning up your startup apps and uninstalling any unnecessary software could also help. If you're itching to upgrade, keep an eye out for secondhand options or sales on better CPUs!

Your setup should still be pretty snappy overall. I would start with some basic checks. Make sure your RAM is running in dual channel and DOCP is enabled, plus check if your CPU is overheating. Also, it might be useful to monitor your SSD's temperature and lifespan.