Re: [GUIDE][TUTORIAL][XMR,ETH,ETN]How To Mod Bios RX470/570/480/580 VEGA Mining

Some new straps for polaris 20 cads ?
old straps can't exceeds 30 for new batches or maybe it is drivers issues ?
I returns 12 x Gigabyte RX 580 Gaming 8G because I can't exceeds good Hashrate

You returned perfectly good polaris cards because you were not able to exceed 30mh on them?
What were you expecting exactly? 40mh per card? What made u have such absurd expectations? Do you have any mining experience?
Do you understand that a better memory strap can help you push the last drop of mining performance out of a card, but it wouldn't change the card itself?
Do you understand how graphics chips, or memory chips, or any kind of chips work? Do you know the term silicon lottery?

Man, I have more than 20 RIGS ( by 12 cards, so this is more 240 cards) with RX570, RX580 all of them mining with 30,5+ (some with samsung 32)...

This doesn't mean you know what you are doing. Each GPU should be considered different. I know where your problem is and I've written about it, latest gigabyte 580 gaming g1 8GB with hynix/samsung don't come with standard IR compat VRM which leads to huge amount of heat produced by GPU and of course less stability. Considering this and the lack of 1500+ timings in bios users assume that flashing older vbios will fix their issue, well it won't. Got this fixed month ago for me and an US fellow who happen to have won the lottery getting only samsung G1 gaming's(hashing with 31+MH ether and 1100 cryptonote at very low power)

But he got those Samsung Cheesy

Not the H5GC8H24MJ