# Are GPU's only a fraction of the cost of supercomputers?

According to wikipedia, the Frontier supercomputer is the largest supercomputer in the world, at 1 exaFLOPS, and cost 600 million USD.

I am quite surprised that the largest supercomputer only has 1 exaFLOPs, because of the following:

• The AMD Instinct MI250X has about 100 teraFLOPS, i.e. 0.1 petaFLOPS.

• Hence, if you stick about 10000 MI250X's together, you get 1 exaFLOPS.

• The price of an AMD Instinct MI250X is about 10k USD, so 10000 of them are about 100 million USD.

• This would suggest that the actual workhorse of the supercomputer is only 20% of its cost (since Frontier cost 600 million USD).

Maybe I did my calculation incorrectly, but if not then this surprises me. Why are the GPU's such a small fraction of the actual cost?

ps. Not sure which stackexchange to use for this if computer science is the wrong one.

• Can you replace "largest" by "fastest"? Largest is by physical volume/area while fastest is by computing speed. Here is the largest computer ever built. Jun 18, 2022 at 16:45