I managed to get my hands on a new Sapphire Nitro+ RX570 4GB card today. I have read that people typically get 26-30 mh/s with these, mining ethereum.
So far, I read a bunch of guides online then mainly used
https://bitcointalk.org/index.php?topic=2163734 as a starting guide.
I installed the AMD beta blockchain driver (
http://support.amd.com/en-us/kb-articles/Pages/Radeon-Software-Crimson-ReLive-Edition-Beta-for-[Suspicious link removed]pute-Release-Notes.aspx) and picked "clean install" then restarted the computer.
(Please note, the workstation in question is Win7 Pro 64-bit.)
Then I used ati flash to back up my bios from the Sapphire RX570 card. Then I downloaded the four bios options in the top section from here:
https://anorak.tech/t/sapphire-rx-570-nitro/5332 (Please note, I checked with GPU-Z and my video card says Elpida for the memory.)
*As an aside, I notice there is a switch on the actual video card that says bios. I have not touched it / it is in the same position that it was in when I opened the box. What is this for / was I supposed to toggle it?)
I tried flashing with each of those 4 bios files, each time I would flash by opening the Ati Flash program, clicking load, selecting a BIOS, and then clicking program. Then I would restart when prompted. After the first one, my resolution came up insanely low so I researched and then installed the "patch" as many guides suggested, which is this:
https://www.monitortests.com/forum/Thread-AMD-ATI-Pixel-Clock-Patcher After I did that, no more crazy low resolution after flashing the bios on the GPU.
However, no matter which of the 4 BIOS I load, every time I try to start a miner - I tried both ethminer and xmr-stak - either way it simply runs for a few seconds, showing 0 mh/s for several lines, then the miner crashes. I am not getting any errors or artifacts or anything weird in windows, just the miner apps themselves crash after a few seconds.
Even stranger, I tried flashing back to the bios backup I took before I started flashing, and the same thing happens. (This is REAL weird because before I started flashing, I could mine albeit getting kind of crappy hash rate, 17MH mining ether. That was with I believe 15.12 ati driver.)
The only thing that has changed, aside from flashing the GPU bios, since that initial "test" is the driver... but everyone seems to say you need to use this blockchain beta driver to get the best hash rate.
Can anyone point me in the right direction here, what am I doing wrong?? Also, when I try to open AMD settings (because I read in a few places that you need to change a setting from "graphics" to "compute") the settings window will not open properly.
Any advice greatly appreciated. I do not believe the card is a dud because it seems to be working fine otherwise, no windows errors or weird visual glitches or anything as explained above - just won't mine.
At the moment I am in the process of using DDU in safe mode to remove my gfx drivers and trying to install the blockchain beta driver again fresh. I am not really sure what else I can do?
