so recently i got few promotion on graphic card. i will go on for gtx 550 ti. as i googled for its performance, i just know it is a power hungry card. question is dcan my psu support it? my psu hv 500w peak. i dont really understand how to calculate the amps for my 12v rail as it state like +12v1 +12v2 -12v something like tht. and plus my psu dont have the 6 pin. so i will use converter to convert 2 molex into 6 pin. can my psu support it? thanks in advance