FuzzySquirrel wrote:9800GT is a 8800GT with a 55nm dye as opposed to an 65nm on the 8800GT.
tbh Hit. If you could afford it a Cosair PSU would work nice

one of their 450's would be plenty for a build like that.
Actually the only thing i heard right about the 9800GT's and the 250GTS is the person saying the 250gts is a 9800gtx+
And no the 9800GT is a 65nm and the die size total is 330mm2.
If i'd remember how to add pics i'd show you GPU-z, because i actually own a 9800GT.
And no the 9800GT isn't a 8800 GT, they perform closely together and are generally the same card but the 9800GT runs cooler mostly faster, use alot less power and has power saving features.
Do not say it the opposite because i actually own the two cards.
To the Main poster.
DO NO SKIP ON THE PSU, You might as well buy a 600 watt PSU.
There are many guide to buying PSU on the internet and i strongly suggest you look it up.
With any of the i series with use logical core ( Threads ) and real cores you will want to have that extra power. As for the 250GTS, I'd suggest you get more power.
Nvidia is releasing it's new FAILURE brand cards ( Jokes the 4xx Series ) so you can look for something better than the 250GTS. Not saying don't buy one, their great cards and if you want to stay close to 600 of what ever you're currency, get a 250 GTS.
Thats my 2 sense for the day
-Nuke.