Before you decide on a GT, what processor do you have?
max_cool said:
As far as DX9 games go (Halflife 2, Far Cry), the 6800 GT and the X800 Pro are effectivly even. The 6800GT cleary has an advantage over the X800 Pro for games programmed using OpenGL (Doom 3). As much as I appreciate the fact that the X800 has a more efficient design, I have to go with the 6800 GT due to it's clear advantage with OpenGL (and Linux, if you're into that) and it's nearly identical performance with DX9.
If you have anything at or below an Athlon 2500 (even a 2800) or equivalent, then the X800 will be much better. The 6800 GT seems to be much more dependant on the CPU then the X800.
For example. this X800 PRO on an Ahtlon 2100 is faster the GT and even the Ultra at some points in Half Life2..
LINK
I want to add that some older games/tech demos may (most likely will) have issues with the way the 6800 handles IQ.
For example, Far-Brausch's Zeitmachine. On the ATI, and previous Geforce hardware IQ is flawless however on the 6800 when you turn on the IQ you get this huge blurry mess. Don't count on the Video processor either (first post on Nvidia's first forum which went online two days ago was a post wanting to know what the hell is up with the broken 6800 Video procs).
But, just like Max_cool said, if you can find an X800 cheaper then 399.99, the X800 is the better deal. When I mean cheaper I mean 349 or less. Unfortunately, you should of asked or read my earlier post. New Egg had brand new X800 Pros for 349 and the OEM/refurb ones at 329.99. Gateway also had them for 349 for a bit. People caught on and now the demand went back up and New Egg has them for 399 - 429 as well as gateway.
For 399.99 the 6800 GT (read the nvnews forums before deciding on brand, lots of bad cards from certain AIB makers). If you are feeling bold,
X800 PRO Refurb for 353.
You could wait till January and see if the X800 PRO ( and maybe the 6800 GT) prices go down a bit. You might want to look around for black friday deals as well.