need help finding apsu and video card

ok i got my system a few months ago and i need to get a new video card and psu. i planned on doing it for awhile anyway here are my pc specs:
amd 3800+ (i think it says runs at 1.8ghz but i thought it runs at 2.0-2.2ghz i may be tghinking of something else)
1gb ram
is really all you need to know.
anyway i have 300 bucks to spend on a psu and video card i was looking at
a 7600gt,7800gtx or maybe a 7900gt or even a x1900gt
but for psu i have no clue what would fit iinto a acer pc. i know the case is an aspire so that really dosent tell if tis atx or btx. anyhelp advice ot links to newegg stuff will help me oput. i'm just mad because there all this great stuff coming with vista but i really dont have all the money in the world so this pc for under 500 i thought was a greata deal.

Yes the x1900gt is a good deal, $204 shipped from newegg and the Antec TP-II 480 for $62 shipped from provantage is a good combo for under $300

have to double check...

Right on the money

edit: I just read "acer" ohh boy... what model??

I've had really good luck with this powersupply. Its got better 12v rails than that antec one and its only 44 dollars shipped.

Hipro 500w

http://www.newegg.com/Product/Prod [...] 6814102022


hear is one gpu for 200$

and you have 100$ for a psu

bump

yeah but the one thing that worries mee is by christm,as time the card im looking at will either come down in price or be unuseable t o play new games. so i would really like to get this card to aply better games other then CS and WOW right now but im jsut like loking at the con of new tech. but on the other hand for christmas i get new pc to make this thing do better and look cooler then i will be happy for the time being. as long as i acn play the newer ebtter games i'll be happy (like riddick etc).

Good luck upgrading an Acer PSU.

bump