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post #2681 of 3492
Quote:
Originally Posted by yrettete View Post

Could have been an r9 280x



Another 45% gets you from 72fps to about 100.
They said up to so I think it is a r9 290x they are more likely to use a top of the line card or on 4K 2 top of the line cards.
post #2682 of 3492
Somewhat off-topic, but does hybrid crossfire work with multiple GPUs? Like if I got a pair of 7750s to go with my 6800k, would I get 1368 shaders to play with?
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post #2683 of 3492
Quote:
Originally Posted by CynicalUnicorn View Post

Somewhat off-topic, but does hybrid crossfire work with multiple GPUs? Like if I got a pair of 7750s to go with my 6800k, would I get 1368 shaders to play with?
It only works with XDMA engines.

Kaveri+Hawaii XT
512+2816

Kaveri+Hawaii Pro
512+2560

Kaveri+Bonaire XTX(R7 260X, the 7790 which is Bonaire XT has it disabled)
512+896

Kaveri+Oland XT
512+384

So, if you find a board with 3 * pcie 3.0 x16 slots via a switch.

512+2816+2816+2816 => 8960 ALUs and Mantle and HSA can use all of them without Legacy Crossfire being enabled.
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post #2684 of 3492
I was referring to current APUs but holy crap is 290X compatibility confirmed? And the 250 is in fact GCN 1.1? Oh if I had the money I would do a Kaveri build... frown.gif
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post #2685 of 3492
Quote:
Originally Posted by Seronx View Post

It only works with XDMA engines.

Kaveri+Hawaii XT
512+2816

Kaveri+Hawaii Pro
512+2560

Kaveri+Bonaire XTX(R7 260X, the 7790 which is Bonaire XT has it disabled)
512+896

Kaveri+Oland XT
512+384

So, if you find a board with 3 * pcie 3.0 x16 slots via a switch.

512+2816+2816+2816 => 8960 ALUs and Mantle and HSA can use all of them without Legacy Crossfire being enabled.

is this info correct? wowowow if true
post #2686 of 3492
Quote:
Originally Posted by CynicalUnicorn View Post

I was referring to current APUs but holy crap is 290X compatibility confirmed?
Llano, Trinity, and Richland's iGPUs do not have XDMA units.
Quote:
Originally Posted by CynicalUnicorn View Post

And the 250 is in fact GCN 1.1?
Hawaii, Bonaire, and Oland are GCN 1.1.
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post #2687 of 3492
That's just stupidly awesome. R9 290X + R9 290X + A10 7850k. Oh, the lulz that would ensue. Does it only work through PCIe 3.0?
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post #2688 of 3492
Quote:
Originally Posted by CynicalUnicorn View Post

That's just stupidly awesome. R9 290X + R9 290X + A10 7850k. Oh, the lulz that would ensue. Does it only work through PCIe 3.0?
It works with PCIe 2.0 and PCIe 3.0, it is recommend for slots with an aggregate of 16 GB/s at least.

FX + R9 290X + R9 290X or FX + R7 260X + R7 260X will work the same way with A10-7850K + R9 290X + R9 290X or A10-7850K + R7 260X + R7 260X.

The FX solution will be slower do to system memory and GPU memory not being fused.

If you want to maximize system and GPU memory, you'll want to put the HDMI/Displayport into the Motherboard not the Discrete GPU. The reason for this is that XDMA will send all the render data to the APU. The APU will handle presentation while the GPUs will handle all the data and processing.
Edited by Seronx - 1/7/14 at 2:47pm
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post #2689 of 3492
Technically no PCIe slot has that since one lane of 3.0 is 985MB/s, so 15.76GB/s is the fastest. tongue.gif Close enough though. However, a couple 3.0 @ x8 slots and a 2.0 @ x16 slot would do everything it needs to. Final question for now: does Oland and new Bonaire allow crossfire via the PCIe bus?
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post #2690 of 3492
Quote:
Originally Posted by CynicalUnicorn View Post

Final question for now: does Oland and new Bonaire allow crossfire via the PCIe bus?
Yes, Oland just doesn't have an Audio Coprocessor.
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