Apologies if my previous reply was interpreted as 'snide'. It was not intended yet honestly I really do not see anything 'snide' about it. With that said, let me explain a couple of things...
Thirty-five years ago I started working on computers and have spent twenty plus years in the industry. I am not your average user.
Prior to running the trainer and making the previous post, my main gaming rig - which I built myself and have built custom systems for several hundred people - was running perfectly. Ten plus hour runs with Far Cry 3 and many other games without nary a hitch. It is rock solid. And, yes, it is overclocked, liquid cooled and, soon, will be in a custom modded Thermaltake Mozart Tx of which I am currently making the CAD drawings for.
After about the fifth time the game crash occurred while running the trainer I researched the possible causes, of which video card voltage was one of several results. I tried many various, possible solutions. Video card driver versions, slight voltage bump on both the video card and processor, running factory stock speeds with and without voltage bumps, RAM timings, trainer troubleshooting suggestions, nothing made a difference. Every time I would run Far Cry 3 with the CH trainer and the ad window popped-up the game would freeze as well as the trainer.
I am not going to go as far to say that I've tried every * possible * solution. I'd be lying if I did. I will say that I have tried every * reasonable * solution considering the fact that my main gaming rig ran the games I play at the quality and performance settings I prefer perfectly prior to using the CH trainer.
If you have any other helpful suggestions other than what I've already tried, I'm all ears.
The trainer is working just fine for me. I picked up this game when it was on sale for 40% off on Steam (why not, right?) and was experiencing crashes after about an hour of gameplay.
I could clearly see the nVidia display driver failing to respond in my Windows Event Viewer, so I knew that the anomalous trainer behavior was simply that - anomalous.
Thanks to Caliber (and the other posters here) making the suggestion to bump up the core voltage - I gave that a spin (bumped up to 1100 mV with MSI Afterburner), and just enjoyed a nice, long, crash-free game session.
Thanks to everybody here for the tips - and thanks to the CH crew for the trainer.