yay you! Always wanting to help out on the info trail...I dug some and came up with a review that states this on the case "The good: Power supply included; fits standard micro-ATX motherboards and full-size video cards. " Now that's good and bad, cuz you never know what full size means...if the gpu folks have settled on a max size we're ok.
I have an x1800...that things a huge brick
But the review does make mention of it being tested in SLI so it fits 2 of those cards
haven't found any info on psu sizing but I'm thinking standard atx form factor size...I don't think this uses anything smaller than norm. Pics don't seem to show a resting bottom cage for the psu, so even if what ou buy is larger it may hang a little lower making for underlying components a possible concern BUT I believe you're ok there. I would have bought these types of cases...if not for the fact I didn't want to work too much at figuring out what could fit what