But since most people will never use those video cards, I don't think building a machine to handle them would be a good use of their money.
They won't buy them when they're $400 new, but when they are $150-200 (and still consume the same amount of power), they very well may. In this situation, the PSU would then have to be upgraded as well.
And at least the option to upgrade is there, which is something HP, Compaq, Dell, etc. don't do. I love HP:
"We gave you a 185W PS that can't handle the components that came standard and we have no upgrade, so you can just replace the PS every year or so."
This is very true.
I think a PS should be able to handle the components in the case, with room to upgrade within reason. If someone is obviously a hardcore gamer, I'd move the PS up for him or her, but it's not reasonable to add $50-$80 to a machine that will never do more than surf the net with onboard video.
The difference between an Antec True330 (which is the absolute bare minimum I would ever put in any computer, period) and an Antec True430 is $10. To go to 480 watts is just another $10. That doesn't seem like too much to ask--plus the supply will be less stressed and run cooler during operation.
Greg
