G73J-BST7 Games Freezing and Locking Up.

A couple of months ago with WoW, I wasn't able to play the game for more than 10 minutes without the screen going blank and my laptop shutting off. The only thing that could fix this is by putting my graphic limiter low, because apparently it was set to max. Whatever, the thing is, I could play GW2 around that time fine. Fast forward to now, around two hours ago, the same problem happened with GW2! All my graphics in GW2 are already low. Doing some research (which brought me to these forums), I guess the G73 has some thermal heating problems? I'm assuming that the ATI 5870 doesn't have a graphics limiter or something, but how do I fix it if my graphics setting on both games are set to low?

I've updated the bios to 213, and my video drivers are 12.1a (I've just installed them gonna try GW2 to see if it locks up and freezes).

Is there anything I can do? I would do a Full System Restore but unfortunately I bought this laptop as a open box laptop, so I don't have ANY discs or anything, plus I have tons of music I wouldn't want to lose.

Help please? Thanks in advance. By the way, here are my temps from HWMonitor.

I don't have any games on at the moment, is the GPU too high?

 

Yes, that's crazy high for not running any games.
Most assuredly your GPU is throttling because it overheats.
Open your machine, clean the vents, clean the fan, clean the dies and heatsinks of TIM, reapply thermal paste (i recommend prolimatech PK1). When reapplying the paste make sure you have a very thin film of paste (as thin as possible) covering the ENTIRE surface of each die. After installing the heatsink, REMOVE the heatsink and observe how well the heatsink made contact with the core of the CPU/GPU. Ideally, the entirety of the heatsink positioned over the die should be stained with thermal paste. Use this to estimate how much thermal paste you need to apply. Ideally, the heatsink should make full core contact with the die and you should barely need any thermal paste at all (razor-thin film), but one is rarely so fortunate.

Also look into cooling mods for your machine (Asus has notoriously bad cooling).

And if you don't know how to do any of the above and don't feel comfortable finding out, get someone who knows what he's doing to do it for you. Such temps when not running games are very worrying.

 

Good advise, but I think this model had excellent cooling- I idle at 50 C or less on the GPU and in the 40 C range on CPU. Before you disassemble verify that the fans are working - I use Hwinfo64 and use the RPM read outs ( not the bogus 30% ) that is reported incorrectly. The RPM read outs should ramp up as temp increases.
If you have a lot of dust (or suspect that you do try this first ) How I fixed my G73 overheating problem! - YouTube