Ok, so I know theres a lot of power supply freaks out there that think they need 1000w power supply for everything but I am looking for someone with practical experience. Right now I have an antec (made by seasonic) 430W power supply and it can run my 8800gtx/core2duo e6600 fine for years now. I dont have a lot of stuff. Just 2GB ram and 2 hardrive and dvd-rw. Nothing fancy so I don't think i am using a lot of power. Do you guys think I can switch my 8800GTX to a 5870 without having to buy a new power supply?