my test is doing on BF3 I played 20.15: 01h morning has nothing to say to my wife LOL So 4h + on my G75 with my GTX670oc was 750/1670 (as I flashed my bios GPU I can not come to CA, so I did the OC results)
with temperature-shelf GPU 62 degrees constant and so constant, only downside fans background noise
-temperatures without the tablet GPU constant 67 degrees and yes constant
I am very happy for these temperatures for info I have a TRI-SLI 580 Watercooler max on the card is 55 dg, my my turn heats + + and am buzzing of (14 fans all radiators)
excuse me for my english I'm french