Ok, well I just got this new fan thanks to everyone's help here. Installing it was a breeze (did it with the RAM upgrade) and the computer is incredibly quiet now. As I use that computer I hear the nearby computer over it actually (few feet away only though).

Anyways, I know it is slightly slower - about 27 CFM vs 44 CFM. I am unsure if this is going to matter but I do want to do something to make sure my computer is running at a good temperature.

As for the computer, it only has 1 92mm case fan (on the rear) but it has a "scoop" and vent on the side (above the CPU). The cpu has a fan of course, and so does the GPU (a small fan).

With that said, what should I look at and what's the best way to monitor this for free?

Thanks in advance, VirtualDr and the memebers are always A1 when it comes to helping me and my friends.