Awesome mini article! I'm now coming back daily to see what you guys have come up with. You really do make interesting reviews/articles that are relevant to PC gamers.
I have a 8800GTX with a E63800 at 3ghz, this is running on an Antec 500 SmartPower PSU, its fine. However I'm thinking of retiring the 8800GTX in dec/jan and looking at the GTX280... but I'm not sure if my PSU would handle it...
So now I can see that the GTX280 takes about 70 to 80 more watts, should be ok
Obviously this is not an exact figure, but can be used to compare!
I noticed you guys ommited the 7800GTX in the test system results?
Also, possible to do this with SLI/CF configs too?