Power supply and Video card compatibility? How to find the Amps?

I want know know if my power supply can power up my GTX 470, it was a gift from a friend and I really don't know much about what it requires. It says it needs minimum of a 550 Watt power supply. (Minimum recommended power supply with +12 Volt current rating of 38 Amps.) I don't know what that means to tell you the truth or how to even find it in the power supply, but my old set up had this power supply.



http://www.newegg.com/Product/Product.aspx?Item=N82E16817182070



It says it has this. +3.3V@24A, +5V@30A, +12V1@20A, +12V2@20A, +12V3@20A, +12V4@20A, -12V@0.5A, +5VSB@3A. It's a 850W.



I don't know how to find the amps or anything like that. I want know how to find it, know if it's enough, if I should even risk it, or wait and buy a new power supply that can power up my system.



This is the Video card by the way.

http://www.newegg.com/Product/Product.aspx?Item=N82E16814130550



So, please. Someone explain to me how to find it so I can get a better power supply if it is needed or just go ahead and install in my desktop.|||You'll notice, on the specifications label, right on the side of your power supply, there's a section that lists the combined power rating for the +12V rails. It say, "768W(64A)",



http://images17.newegg.com/is/image/newe…



That Rosewill power supply is made by ATNG (UL file number E186010), so it's not a very good one --don't buy Rosewill again --but so long as that particular example continues working correctly, it should have plenty of power to support a single GTX 470. You dont urgently need to replace it, unless it starts acting up.|||You need this;



http://www.newegg.com/Product/Product.as…