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What is the actual speed difference one would expect between RDNA4 and Blackwell?

This story is from 2026-09-17. It is preserved in the archive; the latest stories are on the live feed.

I'm having a lot of success with Qwen 3.8 27B with an R9700, and I am considering an upgrade to Blackwell to get more speed, if it would be enough of a speedup to justify the cost. What would be the relative difference in speed I could expect with a Blackwell card, with 32GB or more of VRAM? submit…

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  1. 2026-09-17 19:01 · r/LocalLLM
    What is the actual speed difference one would expect between RDNA4 and Blackwell?

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