Some users have been reporting an issue when playing Starcraft 2. These users have had their graphics cards fried due to uncapped frame rates on certain menu screens. Blizzard has issued a fix for the problem, but has not revealed any plans to replace the damaged hardware. It seems to me that the real issue is with the cooling of the graphics card and system as a whole. I have had my graphics card running overclocked under full load for days at a time, and not once did I have any issues with overheating. For those of you that are worried about this, Blizzard advised the following fix.
Screens that are light on detail may make your system overheat if cooling is overall insufficient. This is because the game has nothing to do so it is primarily just working on drawing the screen very quickly. A temporary workaround is to go to your Documents\StarCraft II Beta\variables.txt file and add these lines:
You may replace these numbers if you want to.