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Finally the 8800m GTX? - Page 7

post #121 of 126
11/15/07 at 6:37pm
by the time dx 10.1 is "useful" there will be dx 10.5b or something that will be the real upgrade to have
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post #122 of 126
11/15/07 at 9:28pm
Quote:
Originally Posted by lgrimal View Post
3DMark06 is an excellent predictor of our a system will perform AGAINST other systems. It doesn't tell you what absolute performance on specific games will be and mainly the drivers are the culprits here...not the chip.

I often read that the Dell 8700M SLI only uses 512KB RAM (2x256MB). This is wrong. Dell configured the SLI module so it fully uses the additional 768MB of shared memory from Vista. So from 2GB RAM onwards the GPU's can use well over 1GB of RAM.

The low added value of 2x512MB in actual performance was the reason that Dell opted for the 2x256MB option (also because of increased price, energy consumption and thermal development of the 2x512MB option).

Above 2GB or main DDRAM, the 2x512MB is just not worth it as it would bring the total to over 1,7GB and games are not optimzed to use that much.

My system has 4GB DDRAM, so my GPUs is never short of RAM.


#1. SLi RAM is mirrored, so 2x256 still=256MB.

#2. I was unaware that THose cards utilized a "turbocache" feature. If they do that is a serious performance impact that you don't want.
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post #123 of 126
11/16/07 at 9:02pm
Turbocache sucks, but does it kick in when you run out of video RAM? Because if it does, I'd rather textures go to and from system RAM than run out of VRAM altogether.

Or then you could run out of system RAM as well and the textures end up in the pagefile.
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post #124 of 126
11/16/07 at 9:15pm
Quote:
Originally Posted by dgcaste View Post
Turbocache sucks, but does it kick in when you run out of video RAM? Because if it does, I'd rather textures go to and from system RAM than run out of VRAM altogether.

Or then you could run out of system RAM as well and the textures end up in the pagefile.
Yeah im pretty sure thats the way it works, but running out of vram and reverting to system ram is hardly better than running out of vram.
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post #125 of 126
11/16/07 at 10:53pm
I think I agree... games must have a fallback when they detect there's nowhere to push the textures and maps.
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post #126 of 126
11/17/07 at 6:10am
Quote:
Originally Posted by dgcaste View Post
I think I agree... games must have a fallback when they detect there's nowhere to push the textures and maps.
Yeah, normally the FPS dive, and the GPU is starved. But Turbo Cache alleviates this somewhat, and would be very usefull if you have over 2 GB of ram.
Its no substitute for real vram though.
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