Userbenchmark shows how users have upgraded the CPU and GPU in the G5 5000. It lists configs with an i9-10900KF CPU being used, but you certainly will need a better heat sink and fan(s) for this flame thrower.  NOTE: Don't pay extra for a non-"F" CPU because this PC doesn't support onboard Intel Graphics ports, which is what the "F" indicates.   The PSU may be an issue because it's a proprietary design and Dell only offered either a 360W or 500W PSU. You said "Stock" PSU but that doesn't tell us what size PSU you have.  Lots of threads discussing PSUs and other upgrades for this PC model so read them... EDIT: There's a list of CPUs that Dell validated in this model in the specs, here.
Hello everyone. I have a G5-5000 and I absolutely love it. It was affordable and does everything I want it to do.  I am currently interested in upgrading it and have a few questions I am hoping someone can help me with. My current system:Intel(R) Core(TM) i7-10700F CPU @ 2.90GHz128 GB (128 GB usable)NVIDIA GeForce GTX 1660 TIPower Supply - StockCPU Cooler - Stock Modifications I have made:1) I replaced the rear fan with a lager one and put two fans in the front of the case. 2) Added in an internal USB 3.0 expansion card. QUESTIONS:1) What CPUs can I upgrade to? Am I able to upgrade to a better i9 chip? Which ones?2) Will I need a better CPU cooler if I do? Which ones?3) What is the largest/best Graphics Card that will fit in the system?4) Will I need a better Power Supply with a better Graphics Card (I am guessing so). 5) Does DELL sell a better power supply that fits in this case? Thank you to anyone who can help me out here with some information.  
Help Upgrading my G5 5000