I am planning on building a water-cooled PC and using a 780ti to power the Graphics, I was going to get a gpu off evga, msi, asus and convert it myself and overclock it accordingly, however I was wondering whether I should buy the cheapest one I could find convert it and overclock it and install MSI drivers on it, however are the actual chips and PCBs different accross brands or is it just a different cooler and clock speed.