Lack of PCIe bandwidth can nerf RTX 5090 by up to 25% in content creation workloads — Puget data confirms performance hit when using older generations and fewer lanes (www.tomshardware.com)

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[-] [email protected] 1 points 1 week ago

This seems to be an issue with most new cards.

AMD because it isn't full-width PCIe connection (x8 or even x4) so you have less bandwidth on PCIe 3.0.

Intel Arc has a reliance on ResizableBAR but also some issues caused by less-new CPUs (which I assume is some graphics pipeline thing).

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this post was submitted on 04 Jul 2025

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