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[D] Biggest batch size that should be used: Biggest even number that the GPU memory can handle, or biggest power of 2 that the GPU memory can handle? Also why do GPUs love power of 2s?

I have heard that GPUs love power of 2s, and that’s why embeddings and batch sizes are often seen as some power of 2, (64, 128, 256, 512, 1024, etc).

But I never have seen a concrete explanation for why this is.

Also, should a max batch size to be considered the biggest even number that the GPU memory can handle, or the biggest power of 2 that the GPU memory can handle?

submitted by /u/BatmantoshReturns
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Toronto AI is a social and collaborative hub to unite AI innovators of Toronto and surrounding areas. We explore AI technologies in digital art and music, healthcare, marketing, fintech, vr, robotics and more. Toronto AI was founded by Dave MacDonald and Patrick O'Mara.