2011 iMac performance/graphic problem!

[Jae Hokes]

So i just got my iMac only in May and it was working beautifully, i kerp it extreme clean, nothing on my desktop, only one application running at a time, etc etc - i play Starcraft 2 and lately after a few game my computer starts to hiccup and really slow down graphics wise and processing wise in general, itll freeze for 5 seconds then move then hiccup etc - everythingbelse on the comp wirks fine like safari blah blah but thisbis starting to worry me ehy could this be happening?

 

[tears2040]

The good this is..... You have warranty..... Use it