Video Card / PS ? - Any Electronics Gurus out there?

Ok I was just wondering how a Video Card could draw 35+ amps from a power supply, when household current is on a 15amp breaker. Meaning, that once you exceed 15amps, if your breaker doesn't trip, your house catches on fire.
Is this a capacitor thing that allows this?

Anyway. I have a Sonota II case with a 450 watt smartpower 2 ps...
I have a socket 939 mobo w/ 4200+ x2 amd chip
7600gt pcie card
2gigs of ram
2 hard drives
1 floppy
1 optical
1 sound card
and a few things like mouse/keyboard/printer connected USB.

I'm getting a new 24" monitor and need to upgrade to put this thing into native resolution.
So I am wondering what video card if any should I upgrade to that this power supply can handle.
I don't want to spend too much but would like to place Crysis in native. Right now I have to play it on medium settings at 1024x768 and get a bit of jittering...

Please enlighten me so I can direct my funds.

BTW...the new 8800 GTS or GT would work quite nicely for you, but it depends on the amount of cash you want to drop when the newer 9xxx series is coming in a couple months.

35 amps x 12 volts = 420 Watts

15 amps x 115 volts = 1,725 Watts

Thanks. I knew someone would translate this for me.
I'm not sure how they figure two 12v areas on a ps and how a video card could draw from both as aren't they all mobo powered?
Please look at my ps specs:
http://www.antec.com/specs/SP450_spe.html

Think they need to sell external power sources for video cards that are beefy so people don't have to upgrade their ps or worry about them.

From SPCr

in this case 32(25 is more of a safe bet with the way this psu works) is the max for the 12 volt rails.....This is providing you are not taking loads(Maxing) of 5 and 3.3....Since they are all off one...the more 12 you take the less 5 and 3.3 you have. its all a combined system

Either way you have WAY more then enough power for your system....

I have the same PSU on a e6600 + X1900XT(power hog) system...Keep an eye on it since some have had problems with that psu. For me, so far it just keeps going strong....

Referring to the power being drawn from the motherboard for the video card, the cards these days draw power from both the PCI-E bus and the PS through a molex cable (4 or 6 pin, depending on the power draw of the card). The above math is correct as far as the total wattage that can be drawn on a 15amp breaker. Think about it this way: a typical microwave oven draws 1000-1200 watts when it's at full power and these can be hooked up to any circuit in the house and not trip it by itself.
As far as the 12v rails go, you have to take into account the tap of the transformer inside the PS. Each 12V rail is independently tapped off of the coil to provide their own dedicated power draw.
If you want a more detailed explanation, here you go:
Power (W) = current (A) x voltage applied (V). Or, in electronics: P=IxE
Your PS is rated to a maximum power rating or wattage. There is a coil inside the PS where the voltage is applied. Physically, there are "taps" that span a physical space that is an exact ratio of the source voltage to the voltage that you want (1/10th of the coil for 12V from 120V source for instance). If you tap the same area for two different voltages, then both of those voltages will compound the amperage draw exponentially (this is calculus, so I won't get too far into the rabbit hole). The different amperage ratings for each tap (or rail) depend heavily upon total wattage rating of the PS and how many taps you have at what voltages. I won't go too deep into it to save space, but that's how you can draw two seperate 12V sources from the same coil and also explain your misperception of what sources the video card uses for power.
The confusion in the case of a computer power supply and the current draw comes from the multiple voltages used and the power drawn on each one. Remember: 30W at 12V consumes less amperage as 30W at 3V. It's kind of counter-intuitive as was pointed out in the previous posts. I'm sure someone on here can expound on this even more, but I really think that you already have the gist of it.