Is it ok to use this video card with this power supply?

Hello, so I got an EVGA GeForce GTX 560 Ti Superclocked for Christmas, and I figured I would have had a good enough Power Supply to use it, but according to the manual I need 2 30A 12V rails.

Currently I have a 500 watt PSU with 2 18A 12V rails. So my question is, is it ok to use this card with my current PSU? If I need to buy a new one, would it be ok to use it now and buy a new PSU later? Like in a couple of days

Thanks

Edit: On the side of my PSU it has a chart, the 12v1 and 12v2 both have 18A, with a max of 432 Watts. If that makes any difference