Hello everyone,

I'm fairly new into mining and I just want to share with you my experience with a Radeon RX 580 GPU paired with Hynix memory.

My card is a Sapphire RX 580 8GB Nitro+ Special Edition (blue card; dual bios, factory OC: GPU @ 1430MHz / Mem @ 2100MHz) with 1x 8-pin and 1x 6-pin power ports.

I'm currently mining ETH and Decred on Windows 10, AMD blockchain driver and using Claymore 10.0 dual miner.

Going with the stock bios this card got me around 15-16 Mh/s, while the OC version went up to 18 Mh/s.....a little disappointed as everybody else (from what I've read online) gets 24-25 Mh/s stock (correct me if I'm wrong here ). I overclocked the memories a little bit more and gained a max 20 MH/s, but temps went even higher ~74 degrees Celsius, fans louder and eventually memory errors started to show up in HWInfo.

Then I started do modify the stock non-OC bios with SRBPolaris V3 and changed the 1750, 2000 and 2250 straps from the Hynix section with this (found on anorak.tech):
    
    777000000000000022AA1C00B56A6D46C0551017BE8E060C006AE6000C081420EA8900AB0300000 01B162C31C0313F17

Now, running claymore with the GPU @ 1150Mhz / 950mV and mem @ 2250MHz / 950mV (values sent as parameters to claymore), the card gets me ~30.8 MH/s (ETH) + ~919.300 Mh/s (Decred), while drawing ~120 Watts (reported by GPU-Z). My system has been mining for 2 days straight with no GPU memory errors reported and temperatures are staying at ~55 degrees Celsius, fans 49%.

With all these mods done to the card I am quite satisfied with it and I'm planning on getting more

Sorry for the long post and I do hope that the above info will be of some help to people who have RX 580 GPUs with Hynix memory.

Cheers!