I might as well post what I posted in the other thread regarding power consumption and comparisons to the 360/PS3:
Note: the PS3 power supply is actually 380W, although the system only took around 200W under load.
Also, to the poster on the last page who posted <400W load in Metro 2033, it's important to realize that a lof of PC games don't fully tax the hardware. Metro 2033 actually barely taxes the CPU, so the fact that it's overclocked doesn't have that much bearing on the power consumption.
Looking at some old GPU articles...I think people really need to tone down their expectations.
The PS3's RSX is supposed to be slower than the 7900GT released that year. How much power did the 7900GT take under load? 50 watts.
Now, let's take a look at a high-end GPU from today: the GTX 580. How much power does it take under load? 300W.
The PS3 was a power hungry beast and it has a 225W PSU, which means its total draw is below that. Next generation consoles are likely going to take less power than that. Even mid-range GPUs like the 6850 or GTX 460 take 100-150W of power, so I wouldn't even expect that kind of GPU performance in a modern console anytime soon.
Source: http://www.xbitlabs.com/articles/graphics/display/power-noise_4.html#sect1
Source: http://www.hardcoreware.net/reviews/review-356-2.htm
That's the total consumption.
A high end GPU alone requires over 200W of consumption during gameplay, and can peak as high as 300W. Total system consumption is well over 400W.
Computers may have gotten faster, but they're also far more power hungry than they were in the past. Video cards now come with big 2 and even 3 slot coolers with 2 90mm fans, when they used to come with small single slot coolers with a single 50mm fan.
This is a 7900GT, a high-end card which is more powerful than the PS3's RSX, and released a few months prior to the PS3:
This is a GTX 570, a high-end card which released a year ago:
Note: the PS3 power supply is actually 380W, although the system only took around 200W under load.
Also, to the poster on the last page who posted <400W load in Metro 2033, it's important to realize that a lof of PC games don't fully tax the hardware. Metro 2033 actually barely taxes the CPU, so the fact that it's overclocked doesn't have that much bearing on the power consumption.