[Beowulf] Theoretical peak performance of DGX A100

[Carlos Bederián]

A100 does 19.5 FP64 TFLOPS using tensor cores.

On Thu, Jun 3, 2021 at 9:08 AM harsh_google lastname <
harshscience777 at gmail.com> wrote:

> I am calculating the theoretical peak (FP64) performance of the Nvidia DGX
> A100 system.
>
> Now, A100 datasheet lists FP64 performance to be 9.7 TFLOPS.
> Two AMD 7742 CPUs will give 128 cores x 2.25 GHz base clock x 16 FP64 ops
> / cycle = 4.6 TFLOPS.
> This gives a total of 82.2 TFLOPS per DGX-A100.
>
> Here is my problem. For any system with DGX A100 on top500.org, numbers
> just don't add up. For eg: Selene has 560 DGX boxes, but its theoretical
> peak is listed as 79.2 PFLOPS, whereas I expect it should be 46 PFLOPS (ie
> 82.2 TFLOPS x560). The same is true for any other DGX based system listed
> on top500. What am I missing here?
>
> Thanks!
>
> Harsh Hemani
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