Hello fellow T|I members, I'm a new member here and have a question regarding GPU upgrade for Alienware m15x. My current m15x has the 6990M but so far I've been having heat issue which leads to complete laptop shutdown . I'm planning to change my GPU to nvidia GTX 675MX. However I can't stop wondering that some people have told me that the 675MX is actually similar to the 770M. Do you guys think that the 770M will perform better than the 675MX? If it does, will it work in the m15x? Does it have to be Dell card or Clevo card is also fine (i need the DisplayPort to connect my laptop to external monitor)? Last question, will both of these cards work stably in the m15x since I'm tired of having unstable GPU (my current 6990M) which makes me impossible to play games at all :| (Diablo 3 temp 90++, dota2 temp 85++, bioshock temp 90++).
P.S. I'm using i7-920XM as my cpu and 150W psu
P.P.S. If you guys can recommend me any other GPU than those two mentioned above that better suits me please feel free to mention it