Under $2K for the GPU part: MCIO cables to retimers keep full x16 per card
TheZachMueller · x · 2026-09-25
Responding to criticism of his multi-GPU build, Zach Mueller clarifies the numbers: the GPU expansion portion of a $10k+ build costs under $2k, or about $6k with the backplane he's experimenting with. The key detail: the MCIO cables run to retimers, so signal integrity holds over the distance and each card gets full x16 bandwidth without motherboard throttling (currently x8 due to the other end; the backplane fixes that). He pushes back against gatekeeping that treats non-server-chassis multi-GPU builds as inherently wrong.
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