If you don´t know, how to push your cards to 30mh without claymore, then go fishing or plant some flowers. Sorry thats one of the basics to understand what is happen if i change vram timings, or mem speed or something else.
If say a fisherman or a gardener wanted to set some timings on a RX580 8GB, would he/she have to read through the entire thread on AMD Mem Tweak XL to learn what each parameter does, or is there a way to find timings that would probably work OK for a given card?
Yeah sure...there is a thread here (actually several) with how to mod a bios..... you listed one....maybe go read it. If not some people offer the service to provide the moddified bios. Threads are here as well.
There are mining OSes that also provide this. So lots of choices. Good luck.