Yeah, i have thought about overheating and have also considered how much memory any applications use. I'll try that Speedfan and report on it ASAP.
EDIT: GPU and Core temps are usually over 90s, have reached 100 too. HD0 is around 40s while Temp1, Core0 and Core1 go around between the 70s. Btw, i always use my laptop in a table, lol.