Which graphics card is better?

I am looking at two graphics cards to purchase:

http://www.newegg.com/Product/Product.asp?Item=N82E16814130220
and
http://www.newegg.com/Product/Product.asp?Item=N82E16814140067

I am wondering which is better, and why it is better than the other one.
Thank you in advance.

 

The big question is, what do you plan on using it for (movie editing, or game play)?

 

the 6800 is better by a bit. The GPU is more advanced, simple as that.

from those few reviews, the 6800 looks to be a bad overclocker, but likely you dont intend to overclock it anyway.

 

I want it for gaming, no movie editing at all. I am just worried, because the core clock for the 6600 is 500 mhz, while the 6800 is 325 mhz. I am unsure which is better, because i am unsure whether the core clock matters so much. Thanks.

 

you cant really compare the clock speeds of 2 different GPUs, they each run differently and are built to function best at certain speeds. although the speeds are lower, the 6800 is a vast improvement over a 6600gt, mainly because of the extra 4 pixel pipelines and 256 bit interface.

 

Thanks so much.
Also, you mentioned Pixel pipelines, and 256 bit interface.
I was wondering what exactly those effect, and what they are.
Thank you again.

 

I looked up pixel pipeline, and it is a video card part that transfers pixel information. The more pixel pipelines, the faster the video card can process pixels.
But i could not find the Bit interface part. Please elaborate on that.
Thanks.

 

I would go 6600gt or move up to a 6800 ultra, you wont see much difference between those 2 cards. My 6600gt performs well in most new intense games at med settings 1280x1024. studders a little bit ijn Quake 4 but it is easily playable, I get around 35fps on low settings.

 

basically, the higher number the faster information can get transferred between the card and the rest of the computer. Think of it as a highway, the more lanes, the faster and more cars can go, same with information.

 

ATI x1600pro might be a very good alternative in same price range http://www.newegg.com/Product/Product.asp?Item=N82E16814102666 Hard to find reviews and such but look it up at www.rage3d.com for example.

 

Id go with the 6800, though I have to say that I had the ATI Extasy 9600 XT and was very happy with it.http://www.mwave.com/mwave/skusearch.hmx?SCriteria=3536213&CartID=done&nextloc=
It worked great with gmaes and movies