Tell me pls, who managed to achieve some better results for rx570-580 using this tweak? Are there concrete examples of what needs to be changed and where, I personally did not understand, read all the help, but in order to specifically change something I did not dare

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It's already been said that you won't see any benefits with this tool for cards that have public optimized timings like all the RX 4xx/5xx (micron/elpida/hynix/samsung).
Of course if you want to further optimize timings this tool comes handy, but you need background knowledge.