Question regarding amps on a power supply

Jdogdemapples

Honorable
Mar 13, 2013
9
0
10,510
So i bought a prebuild computer last year with a gtx 550 ti graphics card. Recently, i've had the oppertunity to buy a gtx 670 really cheap from a friend. My system meets the requirements to have the card except the amps on the power supply. I currently have a 550 watt psu with 28 amps on a single 12v rail. The card says it requires 38 amps. Will the card work? Does the amount of amps even matter? Ive asked around a bit and other people have said that i could run the card. Yet i dont understand. If someone could please give me an answer and an explanation that would be great:) thanks!