ok right, i recently bought the new Ati Raedon x1900xtx croosfire ready graphics card and it is running like ****! i had an old x850 and its running about the same on that, i have a pretty powerful computer and my power input is only 500watts do you think the reason that its being slow, under preforming could be because my power supply is too low? what do u guys think? any help will be greatly appreciated thanks.