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[TPU] Sapphire Radeon HD 7790 Dual-X Pictured, Tested - Page 9

post #81 of 84
Used to be an AFR mode that would share the workload according to the cards abilities.

I think hybrid crossfire is only limited to the type of rendering the cards do, IE shader types etc. If they are the same and the cards are similar hardware wise it should work. Not sure about the load sharing between different cards or clocks anymore though.
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post #82 of 84
Quote:
Originally Posted by sherlock View Post


No I don't think you couldn't because the GPU silicons are different.

You can CF 7770 & 7750 because they are both Cape Verde Silicon, You can CF 7870 & 7850 because they are both Pitcarin Silicon, but you won't be able to CF 7770 & 7790 because one is Cape Verde(1.5Billion Transistor) the other is Bonaire(2 Billion Transistor). Likewise You also couldn't CF 7870 Tahiti LE & 7870 because one is Tahiti(4.3B Transistor) the other is Pitcairn(2.8Billion Transistor).

Has this been tested?
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post #83 of 84
Quote:
Originally Posted by bencher View Post

Has this been tested?

No, but judging by How AMD's Crossfire chart works.



It shows you can't CF GPUs with a different Silicon code name, Note that you can't CF 6790 with 6770, 6790 uses Barts LE silicon, 6770 uses Jupiter XT. You can Crossfire anything from 5830 to 5870 because they are all Cypress Silicon.
Edited by sherlock - 3/24/13 at 8:19am
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post #84 of 84
Quote:
Originally Posted by svenge View Post

There will certainly be 2GB variants of the 650 Ti Boost. Even with the same memory back-end (in terms of size and speed), it would still have only 70-80% of the raw processing power of the 660.

Either way, AMD might be more clever than we give them credit for by discontinuing the 1GB version of the 7850 at about the same time as the 7790's introduction. There won't be nearly as much cannibalization since there won't be much overlap with AMD's surviving low-mid card lineup.

Ah but you see, the memory bandwidth is the main hold-back for the GTX 650 Ti in apps where there is barely any difference between the GTX 680 and GTX 650.


http://www.pugetsystems.com/labs/articles/AutoDesk-AutoCAD-2013-GPU-Acceleration-164/


http://www.pugetsystems.com/labs/articles/Adobe-Premiere-Pro-CS6-GPU-Acceleration-162/


Why not grab a GTX 570? Sometimes computing environments require low power/heat/noise and compute isn't an issue (& 3 monitor setups without SLI).

edit: also

The memory bandwidth bottleneck is there http://www.anandtech.com/show/6359/the-nvidia-geforce-gtx-650-ti-review/17
Edited by AlphaC - 3/24/13 at 8:06pm
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