how did u manage to get 490 watts in the calculator.
At most that system takes about 275 watts based on your specs.. My system is very much the same but using an ATI x1900xtx which consumes more than the nvidia and REAL power mesured at the electrical outlet stays below 300 watts under full load...
I just entered in what I have and it came up with that. You think I'll be fine with 520 eh? I know that calculator calculates the MAX for everything, but I don't want to be wondering if my system is running worse than it ought to be.
As for the cat idea, I was thinking of getting a standard household bike generator (which is good up to 800W), and powering a wheel about one metre in height, and wide enough to fit four cats. Alternatively, the human model could be used, possibly used by illegal immigrants.
You are WELL within limits on power requirements. Don't listen to all those people who tell you to waste your money on huge power supplies, people on here seem to way over estimate the amount of power systems will use. Running at stock, you would probably use around 300W-350W. Probably closer to 300W.
Now you've gone and made monkey, cat, and illigel immigrant lovers very unhappy with you. You might get banned from the forum!
On the serious side, I upgraded my system to an x2 4800, 250 hard drives - Raid 0, EVGA 7900 gt, audigy 2zs... The tech put in a 600 watt cooler master... it barely met my pc's needed power requirements. It was also NOISY. Put in a Coolmax 700 watt ...powered for a few years, quiet, and a good warranty. Check the amps on the rails and go for the power you need down the road.