How to apply thermal paste on Orion 3000 po3-630 Cpu and GPU

There are actually many different pastes you can use. On your model though I'd look seriously at the Noctua cooler replacement many people here have installed. It will do a much better job overall than just a repaste on that young of a machine. Also look at everything else in your system, your performance might be gated by something completely different than CPU temperatures. You have a decent SSD to boot from, so that's OK. 16GB is pretty close to the minimum I'd run on a gaming rig for system memory, have you looked at your memory load to see if you might be running low enough to swap out to the SSD? If you are under something like 70% usage when a game is loaded you are likely good. Which GPU do you have?

You seem to be trying to throw money at a problem without figuring out what is causing the problem. There are lots of fans you can change to that will be quieter, and fans you can change to that will move more air, but the process of moving more air will always also make more noise. What is your actual issue? If it's heat related, what temperatures are you seeing, under what conditions? Did you look at your memory usage as I suggested?