i haven't done any major upgrade on my system since i bought it, i only added RAM to it. My current spec is: i7 2720qm gtx460m 256 ssd 12 GB Ram I wanna get the gtx 780m, i've already done all the research i could, as far as i know as of right now, it will fit and work. But ( there's always a but:distrust:), i read somewhere that there might be some issue with the TDP. something about the 780m uses 122w and the voltage is higher than my current graphic card. I'm buying it o