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ATI RADEON HD 2900 XT 1024MB
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Written by Gizmo   
Friday, 12 October 2007 22:32

Digit-Life show us the real deal: 

We understand why AMD doesn't allow to sell cards like HD 2900 XT 1GB. Even after our first article of this series it was clear that the problem was not in memory capacity - 512 MB of memory was quite sufficient even for top graphics cards. There is nothing wrong with memory bus width either. The problem is in the core.

Read the full review at Digit-Life:

Our tests proved that the first driver bundled with the first card sample significantly raised performance at the expense of other card features. By "other" we mean antialiasing. Alas, there is evidently a bug in the GPU, since it does not allow the core to process AA as it would normally do. But the idea was brilliant! Expand the memory bus to 512 bit, so that AA is processed almost for free! Pity, but we can already state the fact that the card does not need 512 bits of bandwidth, because it's not utilized at 100%. The company got around this bug rather smartly - drivers are used to force ALUs process AA. That is, AA is actually emulated, which takes up much shader resources and affects overall speed - all our tests prove it.

Now, imagine this product with 1024 MB of memory instead of 512 MB. What does it give us? Not much. OK, memory performance is increased, because memory frequency is raised from 830 MHz to 1000 MHz. Memory bandwidth is increased. But will it help the gimpy AA mode? I think if you pay US$550 for this product, you have the right to demand normal AA operation. All AMD programmers are currently optimizing the drivers to minimize these losses.

 
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