Question for you GPU gurus...

[Dann Corbit]

Do the new AMD Epyc and the new AMD Vega GPUs have transparent access to the same memory since both use "infinity fabric"?

If so it would seem to be a really interesting combination for chess.

There have been a few GPU/CPU combos that could do that lately, but they were under-powered development boards.

[DustyMonkey]

No.

..and its still crossfire if you want to run multiple Vega GPU's together.

[smatovic]

Maybe the new Franken-Chip from Intel with integrated AMD Vega GPU offers what you are looking for......it looks like the integrated HMB2 is accessible by GPU and CPU:

https://www.pcworld.com/article/3245169 ... -leak.html

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Srdja

[jhellis3]

I am not sure about AMD GPUs, but here is a pretty good talk from the Nvidia side: https://www.youtube.com/watch?v=86seb-iZCnI

[Daniel Shawul]

The power 8 processor with pascal GPUs replaces the PCI express with nvlink which is very good for memory-bound applications.
I think for chess, which is a compute-bound application, even a slow PCI connection to the CPU is Ok since we don't plan to do computation on the CPU anyway.
I believe finding the right parallel search algorithm is the main reason why chess has not performed well on the GPU.

Daniel

[smatovic]

Here some more info about the Intel CPU AMD GPU combo:

http://www.fudzilla.com/news/processors ... m-graphics

The GPU is connected via PCIe 8x, has 4 GB of HBM memory and 20 to 24 compute units.

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Srdja