Engineering10 min read
One Config Is Always the Weakest Card's Config
A mixed GPU fleet has one setting per model, and it has to be safe on the slowest machine in it. We measured what that costs: an RTX 5090 running at 8% of its memory bandwidth because a 24GB card three racks away needed a flag. Two arguments, applied only to the cards that could take them, made it fifteen times faster. Here is what the engine measures per node, what it changes, and the two things that surprised us.
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