Dell XPS 17 L702x :: Extremely Hot Case During Game Play

My problem is that the laptop is getting extremely hot on the left side of keyboard during any games i play, even older games. I literally cannot rest my left hand to use keyboard as it is frying it.

When i initially bought the laptop 4 months ago I could play those games and the case (keyboard area including) would stay perfectly cool. I had even played need for speed hot pursuit new with full graphics and laptop was cool.

There is a definite massive difference in case temperature between initial month or so and recently.

HW monitor program recorded temperatures of 85 degrees max for i5 processor, and around 72-78 degrees on graphics card during game play on a variety of games old and new.

Worth to mention that during other lightweight activities, such as surfing etc the laptop is cool.