i want an evga gtx 560 Ti for my system, on the evga site, it says that the card requires a minumum of 30 amps on the +12v rail. i have an antec truepower 650, which (on the sticker) says that it has a maximum of 25 amps on the +12v rail. will my power supply wreck the card? will it run at lower speeds or with less cores? do i need to upgrade my power supply? appreciate any help