engineer, put cooler here.

1) How can you play L4D2 when you don't even run a PCIE 16x card? xD

2) Did you change the thermal paste when changing the the coolers?

3) How old is your CPU?

4) Did you try leaving the side of your case off, when playing?

I probably missed it, but what are your specs?

Well.. If you have new thermal paste, tried with your chassis off, and your CPU is "only" 2 years old.. Then it sounds more like the cooler is crap.

To be completely hones, I have no idea what could be wrong. It would seem like the CPU just run extremely hot for some reason.

I have almost the same CPU, x2 5000+. I have a stock cooler, I also have a crappy small case, and mine doesn't run hot.

Weird.

My computer has even worse specs but never runs hot. It's 4 years old too.

Well, taking the side of the case off following Karl's recommendation seemed to help a bunch. Thanks for your help anyway

Sounds to me like airflow is your problem. Maybe you should consider looking into your airflow and looking at where is it coming in, where it is going, and where it is being exhausted.

Engineer, put cooler here.

Engineer: Nope.

Well, taking the side of the case off following Karl's recommendation seemed to help a bunch. Thanks for your help anyway

Karl's? Wat? Wasn't it mine?
I HAVE LOW SELF-ESTEEM!