New graphics card help.

I'm sorta thinking about getting a new graphics card as some of the more powerful ones have hit some pretty low prices lately (sub $150).

It'll either be the 320MB 8800GTS or the 9600GT. I don't really know much about either... just that they'd be a good upgrade over my 850XT (which works just fine mind you- it can run Crysis on medium at 1280x720).

8800GTS: http://www.newegg.com/Product/Produ...AFC-SlickDeals-_-NA-_-NA-_-NA&Item=14-130-082
9600GT: http://www.newegg.com/Product/Produ...lickDeals-_-NA-_-NA-_-NA&Item=N82E16814133216

I only have PCI-e, but it's the original one... not the new one (whatever it's called). My power supply should be able to handle it (Corsair 620HX) but it only has the 6 pin power connector for graphics card- not sure what what the 8800 or 9600 cards use. Also, there's only 10-11 inches of room so I don't even know if they'll fit. And then there's the question of bottlenecks...

Specs:
AMD AM2 X2 3800+ (Windsor) 2.0GHz
1GB x2 Ballistix plus x2 Ballistix Tracer (all 4 @ DDR2 800, 4-4-4-15 2T); ~3.5GB usable
ASUS M2N-E (damn crap mobo that doesn't let me OC...)

Any advice for me dudes?

the 8800GTS with 320/640MB are the older GTS. you don't want those. they get beat by the 8800GT, so you want that one. they've been going for pretty cheap so you can wait on a deal for those.