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Old 01-06-09, 10:38 PM   #1
muelo1000
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Question ok Whats better on a graphics card Texture fill rate or memory bandwith

Just was woundering what would be better texture rate or memory bandwith, you see all this cards in series that has some lower card has less bandwith but more texture fill than higher end cards and visversa so wich is more important on a graphics card ????
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Old 01-06-09, 11:47 PM   #2
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Default Re: ok Whats better on a graphics card Texture fill rate or memory bandwith

well if you have a large fill rate but not enough bandwidth your stuck. however, if you have more bandwidt then the prt uses you have uselss bndwidth.
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Old 01-07-09, 12:59 AM   #3
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Default Re: ok Whats better on a graphics card Texture fill rate or memory bandwith

bandwidth
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Old 01-07-09, 02:06 AM   #4
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Default Re: ok Whats better on a graphics card Texture fill rate or memory bandwith

Fill rate.
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Old 01-07-09, 05:39 AM   #5
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Talking Re: ok Whats better on a graphics card Texture fill rate or memory bandwith

Bandwidth !!!

Texture Fill Rate = #TMUs x Core Clock

All your TMUs could become useless if they are not feeded with the texels from memory that they need.

Why do you think that we use texture compression ? Because you save 1:4 or 1:8 of the needed bandwidth (& space of course), and your TMUs can reach their maximum theoretical load quicker.

Also, the TMUs have access to a very efficient L1 & L2 cache (fully associative), precisely to save bandwidth.

The problem with the modern games is the heavy use of shading power. But, in older titles, with more simple shading programs, the situation is inverse, and the bandwidth is what matters.

Sucks, because bandwidth isn't growing as fast as the shading power, and we still cannot use SSAA with the older titles.

Hope this helps
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