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all lessonsS.1●●○○○

Why GPUs beat CPUs

Each output cell of a layer is its own independent sum, so all of them can be computed at once.

1Same 36 cells, two machines. Tap the one you'd back, then Fire.your turn
Tap a board to back it.
continue backR replay

But one chip can't hold a frontier model…

S.2 Why training needs datacenters
Physical Substrate·

Common questions

What is "Why GPUs beat CPUs" about?
Each output cell of a layer is its own independent sum, so all of them can be computed at once.
What problem does it solve?
A giant matrix multiply on a few fast CPU cores takes forever.
What will I be able to do after this lesson?
You can explain why AI runs on GPUs: the matmul is parallel, so wide hardware wins.
What comes next?
But one chip can't hold a frontier model…