4090 vs 5090 performance difference is largely GDDR6 vs GDDR7, I think | Hacker News

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		Figs 9 days ago \| parent \| context \| favorite \| on: Shapelearn Qwen 3.8 27B (13.1 GB VRAM) 4090 vs 5090 performance difference is largely GDDR6 vs GDDR7, I think
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wtallis 9 days ago [–]

It's equal parts memory clock and bus width: RTX 4090 is 384-bit wide at 21 Gb/s and RTX 5090 is 512-bit wide at 28 Gb/s.

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