I've been researching this myself since I'm experiencing rare freezes since 1.0.8. I've made thread about it. http://us.battle.net/d3/en/forum/topic/9309261246
Below is a collection of more threads I found on freezes since 1.0.8.http://us.battle.net/d3/en/forum/topic/8796271684http://us.battle.net/d3/en/forum/topic/9245745680http://us.battle.net/d3/en/forum/topic/9309381243http://us.battle.net/d3/en/forum/topic/8796090128http://us.battle.net/d3/en/forum/topic/9309531791
I own a GT70 ONE with a GTX 680M. I didn't have this issue before 1.0.8. At first I could not find anything wrong with my gaming notebook. However intensive testing did find memory errors and GPU throttling due to too high temps. Like I said at first everything seemed ok. Windows Memory Diagnostic tool didn't show any problems. Logging GPU temp with GPU-Z didn't show any real problems. The temp was high @ 93 degrees. However GPU-Z didn't detect any GPU throttling. I was experiencing FPS drops and stuttering at that time. This was already present before patch 1.0.8.
I started doing more testing with Memtest86+. It found 8 consecutive memory addresses to be faulty. I tried it with a different version of Memtest86 to be sure. Same address came up as faulty. I have had not one single windows crash other then game freezes in Diablo 3 since 1.0.8. Therefore I'm pretty surprised Windows Memory Diagnostics did not catch this. I'm reluctant to believe Memtest86 is at fault here since I used different versions and the latest one detects my hardware properly.
I started using Nvidia Inspector and ran the sensor monitoring. It did show GPU throttling because of the GPU reaching throttle temps. This resulted in jerkiness and FPS drops. I did another test and actived the cooler boost on the laptop. Now the max temp reached was 84 degrees and no GPU throttling. Pretty much no more jerkiness and FPS drops.
I'm going to be testing again with the cooler boost on all the time during D3 play and continue to moniter temps and GPU clock. Since the memory "might" be at fault here I can't be sure and therefore I issued an RMA request for the laptop. Although 93 degrees is not a temperature that will fry the GPU, it's still a temperature to be concerned about. It will cause continuous GPU throttling. I'm going to continue playing with cooler boost enabled and see if I experience any more freezes just to be sure.
You might be experiencing a similar issue and I strongly recommend performing the same tests. Below are the links where you can find the required tools.
Let me know your findings.