Originally posted by: yliu
Hi,
I know that at stock speeds, many consider X800XL to be slightly better performing than 6800GT over all. However, from what I read the overclockability of the 6800GT is alot better since many can go to ultra speeds and more (that's over 14% of gain) while the X800XL is often limited to about 10-12% of gain. So has any compared the performance of a 6800GT at 400/1100 and an X800XL at 450/550? I am only asking about performance so cost is not a factor
The bottom line answer to your question
overall, ATI and NV are about equal in DirectX performance
But in OpenGL, NV wins by a landslide, see Doom3
so who do you go with? Well I'll leave that up to you.
Now on the X800XL, its too late to be buying one of these, ATIs new cards are right around the corner with DX9C support and beyond.
If you buy today, you want DX9C (the current DX standard) and ONLY NV cards have that
The X800XL does not overclock well. Not nearly as well as the Geforces.
The X800XL has more pipelines (than x800pro), and the X800Pro has lowK dialectric insulation which is why it overclocks well.
So the X800XL is kind of stunted in its ability. If it were built like the X800Pro, you'd have a VERY fast and overclockable card.. too much for ATI's taste, it'd cannibalize their X850 sales.
The short answer?
You dont want to go with either of those, if the X800XL was more overclockable.. it'd be AWESOME.
But its not.
So get the faster stock card 6800GT, with DX9C hardware, better drivers, much faster OGL and MUCH MUCH better overclocking.
You can listen to the ATI fanboys who know nothing other than "X800XL is $300 ROCKSORZ!", or you can listen to me. Take your pick, but you'll notice they offer short quips as to why you should get a X800XL.. and I give you the WHOLE story.
From top to bottom, the Geforce6 lineup hands down sprays feces all over the ATI lineup. Sorry its the truth. The best ATI card is the X800xl, and as stated, even it isnt so great all things considered.
Good luck.