Power supply questions

[z1pp]

I have a 500 watt (max) power supply that has 2 +12v rails. One is rated at 17 amps the other is 16 amps. If I wanted a video card that needs 18 amps from +12v, does the combined +12v of this psu suffice, or is this a situation where only one of the rails will be used leaving me an amp or 2 short if I were to use that video card?

 

[pkme2]

Here's some links that are great info.
http://www.bleedinedge.com/guides/psu_select/psu_select_01.html
http://www.directron.com/psu.html
http://forums.extremeoverclocking.com/s...57cbd9c9000927ae2dfa2c7ec462d&t=136602

 

[z1pp]

Thanks for the links. They helped a lot.