I have tried it, tested it, so far it is working, it "feels" better at the very least. If mine craps up, I honestly think it's just my system. If there is still freezing, I will be taking down this post.
My game's been freezing my system while playing DIII numerous times, all random, which points to GPU heat issues, or just struggling to keep up with the pace of the game. I play other graphics-heavy games, and it does not freeze like DIII. Why random? Game's perfect. Great settings, max resolution for my system, smooth gaming then poof. Lowest settings, poof. Windowed not windowed, POOF. Idle in town, POOF. Minimize DIII, surf, do whatever, maximize DIII POOF. Ten minutes into playing POOF. Fifteen? POOF. One hour? POOF. Thirty minutes? POOF. Cool down system, stresstest your system without DIII, fine. Turn on DIII POOF. Yes, all related to DIII. Seems funny but it is frustrating.
This can also be a solution for driver crashes for those experiencing Chrome crashes due to Flash (minor solution: disable hardware acceleration for your flash)
This was the solution that worked for me, might work for you. The following will help out your old (or new) GPU's temps as well. My temps ranged from 60-70c prior to some tweaks, and after, never went beyond 60c. No OC.
- Roll back drivers to 296.10 (Stop here, do not go beyond. You can go lower, but I would not know how it will react). Search for it in the nvidia website. This will also work for those suffering issues from Flash conflicts with their browsers. This is the first WHQL set that also accomodates DIII if I am not mistaken. Prior to this set of drivers, you probably will get the "drivers are outdated" whatever. This will probably fix some issues.
- Check your Nvidia Control Panel. Turn off FXAA, do not use any "adaptive" v-sync and check your PhysX processing. Take note, the earlier two mentioned come along with the latest drivers, and I think they are the ones conflicting with everything. Leave it at "auto-selected", or make it CPU. This is the main cause for intense heat. At least for my card, it was a 10c loss when I auto-selected. DIII is a PhysX-heavy game, which makes it more fun AND frustrating with the freeze.
To summarize, the game's truly at fault here. If not the game, then on Nvidia. There is something broken there that does not maintain stability with the GPUs. I am no expert, but if you are like me, where your PC only craps up on DIII games, then you know something's up with the game. Don't be too hard on yourself or anything if you think it's your system. Before doing anything else about your system, please do be patient and diagnose it before underclocking or whatnot.
Windows 7 Ultimate 64-Bit
AMD Athlon 7750 Dual-Core
Hope this helps somewhat. Worth giving a shot before tinkering with the hardware.