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RTX 3090 at PCIe 4.0 x4 for AI - would you bother moving it to x8?

This story is from 2026-09-08. It is preserved in the archive; the latest stories are on the live feed.

I'm rebuilding my local AI PC and ran into a spacing issue with the GPUs. Specs: Ryzen 9 7950X ASUS ProArt B850-Creator WiFi Neo Phanteks Enthoo Pro 2 Server Edition full tower 64GB DDR5 2x RTX 3090 24GB RTX 2000 Ada 16GB Gigabyte 1600W PSU Ubuntu Right now I have: 3090 #1 -> x8 RTX 2000 Ada -> x8…

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  1. 2026-09-08 19:57 · r/LocalLLM
    RTX 3090 at PCIe 4.0 x4 for AI - would you bother moving it to x8?

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