could this also be why i see some stuttering on simple tasks as well? (simple tasks being web browsing, opening folders, etc.) I recently replaced the PSU and GPU with ones i had laying around and it seems like it got better
(I had read that the PSU may not be adequate for the video card and needed to be replaces?)
How many watts is the PSU? No, the cmos battery has nothing to do with the system stuttering and such. If you got the computer from work, it could be that the the OS is a bit clogged up, which is why you are seeing some minor performance issues. You can remedy it by re-installing windows, i.e. a fresh install, which means you would wipe everything on the hard drive out. Or you can run a few programs like CCleaner and Malwarebytes to clear out temp files and see if there is any malware on it.
Other do not like them, but I would also recommend running Glary Utilities, a registry cleaner. I've had great success with it in regard to restoring performance to older computers. All the programs are free, so give it a shot if you would like.
I would also recommend updating the drivers and such via Dell's support site. It wouldn't hurt to update the graphics card drivers as well.