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View Full Version : Latest NV exts. only on 8xxx and 9xxx ??



speedy
05-05-2008, 11:50 AM
I think V-Man's comment deserves it's own thread:

http://www.opengl.org/discussion_boards/ubbthreads.php?ubb=showflat&Number=237803#Post237803

Anybody know is it a real hw. or a driver limitation?

Seth Hoffert
05-05-2008, 12:36 PM
It's not a driver limitation... the new extensions are only available on NVIDIA's newest GPUs (G80+) (hardware instancing, texture arrays, transform feedback, geometry shaders, etc.)

speedy
05-05-2008, 01:08 PM
@Hex: check the URL I quoted - for example EXT_bindable_uniform should be IMHO hardware agnostic.

Seth Hoffert
05-05-2008, 01:31 PM
Not necessarily... I can see it being a hardware limitation such that the uniforms are stored in some other area in memory.

I think from this image (http://www.pcper.com/images/reviews/319/dx10_06.jpg) it's evident that uniforms on SM3 cards are stored in some kind of constant memory and cannot be mapped to VBOs (256 max on SM3 to 4096 max on SM4), but I'm no GPU hardware expert and could very well be wrong. :)