Dell :: No Temperature Displayed

I'm in a bit of a jiffie, my 1330 had some problems with overheating so I formatted but it turned out it was a piece of dirt stuck in the fan, anyways problem solved.

I thought.

Now, I get the slowdowns again, albeit not that severe. Now, when I open hwmonitor it only shows my CPU, HDD and ACHP. The GPUs temp won't show up.

I installed ntune, nada, same thing. What could be the problem, is the temperature measuring thingy broken I'm kind of worried that my 8400m gs is dying on me since it was a pos to begin with but I really dont feel like sending in my laptop.