PSU Rails

If a graphics card requires >20 amps on the 12 volt rail, and my PSU has 2 12 volt rails that produce a combined current of more than 20 amps, will the card work?

The power is delivered directly through the PCI-E slot-no cables.

http://forums.techpowerup.com/archive/index.php/t-25489.html

noticed that

It should be fine though