the most recent version on the website, I can't look right now at work, but I believe it was 301.42 if I remember right.
and yeah a better example of what happens is this:
In guild wars 2 there are major cities and 99% of the cities is fine, but lets just say there is alot of light or water affects in an area, and I turn my view towards it, I will see my GPU usage go from like 70% and climb suddenly to 90+ and obviously hit 99% within a matter of a few seconds, at that time my screen will flash black and come back with monitor stops responding if it recovers.
if it doesn't recover I have gotten a system crash that goes to a bright red screen, or even just a simple system shut down to a black screen that requires a forced power off.
it's odd.. it has happened both in the normal game world and in cities, alot of times around water and bright lights.