Hello, I have a standard X51 with a 330wPSU. I would like to know if I could upgrade to a EVGA GTX 670 FTW 2GB. If it is possible to not change anything else that would be great. Also, I have been watching http://www.youtube.com/user/Ray2kay6?feature=watch video's. He has done some amazing things. Also, I want to know if a GTX Titan fits into an X51 because i'd like to have that. If I do get the Titan would I need anymore cooling or anything like that? Thanks