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Hello all,

I am a newbie for mining ETH. I have 2 AMD cards and use lolMiner 1.18a. One is RX470, another one is RX570.
When I began mining ETH. I found my two cards Hashing rate were 22H/s, 24H/s respectively.

1) What I can do on my cards modding up to 30H/s like other people?
Moreover, I found the temperature around 74C degree even they were at lower hashing rate.

2) Would I need to lower the core voltage in order to get cooler temperature?

Thank you for your helps!

1) 4GB -- normal hashrate 19 - 20 MH/s
8GB -- 29 - 31 MH/s

2) start with 900 mV and then try to go lower (some of my rigs can handle 868 mV, some are at 881 mV)

Complete true... that 4Gb values are with the actual Epoch... it will continue going down each 4-5days...

Well that's weird because I'm running lolminer 1.19, and RX5708GB cards and they are all around the 22MH. I can't get it back up to 30+ like I used to in Claymore

RX470/580 8Gb can run 32Mhs if you have the correct BIOS Mod on it... you should check your Bios Card

Ok.... it freaks me out a little to do this to a video card as I havne't done it before. Is there some step-by-step and reliable source I can get what I need from? I'm going to do it.
Here's what I'm running:
Windows 10 x64
(12) AMD RX570 8G cards (current AMD driver 20.12.1)
lolminer 1.19

Adding in a snapshot of my AMD via GPUz
https://josh.lindemanns.ca/wp-content/uploads/2020/12/RX570.jpg