Interesting... was/is Claymore reporting any rejected shares to the console? Ie - "Total Shares: 287, Rejected: 3" or the like?

I have Gateless Gate (the previous iteration of GGS) by only used it for Neoscrypt coins (TZC and FTC), where it performed very well (and devfee is optional). If GGS improves on GG enough to offset the devfee and has generates less invalid shares then I'm all for it.

The only halfway plausible way of evaluating miner speed - that I know of, anyway - is to see how many coins you earned over a 24 hour period and compare it to what you should have gotten based on the average difficulty for the last 24 hours on the minethecoin.com calculators. Otherwise you are trying to calculate a continuously moving target.

Your always going to get some incorrect/invalid/rejected shares if for no other reason than latency (aka "ping time") between you and the pool. In fact, this is the main reason why you should try to use pools with low ping times, which are generally, but not always, the ones closest to you.

I also just started mining, but am proceeding at a much more moderate pace than you (18 cards already? Ambitious!) but I already went through the same puzzlement with Claymore and finally decided that the program sucks. Ethminer might *appear* to give a lower hashrate, but what it reports and what I actually get mining UBQ or MUSIC (on Pool Sexy) are very close, and there is no devfee for Ethminer.

I don't mind paying a devfee for demonstrably better hashrate, but lying to me about the hashrate and/or submitting stale shares to artificially boost it isn't cool. I'm not saying Claymore is doing either of those things, just that I earn more coin per hour with the same rig and settings running Ethminer 0.12.0 than Claymore 10.2.

Hi everyone,

I have finally succeed in making my SAPPHIRE NITRO+ Radeon™ RX 580 8GD5 Special Edition with SAMSUNG memory to work as they should, making 30.700 – 30.900Mh/s
As I said earlier, this is all new to me, only 10 days in business. I believe that somebody who is pro would make even more Mh/s, but this is for now enough Mh/s for me :-)
I would like to share with you everything I had to do to manage this hash rate and hopefully help somebody who is newbie like me.
I will start from scratch!
IMPORTANT: everything is done on one card, then pull out that one and put the other one in the PCIe slot.

1.   First I had put bios switch on the graphic card in position for flashing, how that is done you can find here https://www.youtube.com/watch?v=FT9K8DqaeDs
2.   Then, I have checked which kind of memory do I have on my RX580 with this tool : https://www.techpowerup.com/download/techpowerup-gpu-z/  (GPU-Z)
3.   I have downloaded latest Crimson driver from here: http://support.amd.com/en-us/kb-articles/Pages/Radeon-Software-Crimson-ReLive-Edition-Beta-for-[Suspicious link removed]pute-Release-Notes.aspx    You should only unpack driver, without starting setup. In Device Manager on your display adapter right click on your graphic card and select Update driver/Browse my computer for driver software – and navigate to folder where you unpacked your driver.  When you put the other card after the first one – windows would install the same driver – you don’t need to go thru this process again.
4.   Run atikmdag-patcher  https://www.monitortests.com/forum/Thread-AMD-ATI-Pixel-Clock-Patcher  Here is where you can download and see the manual.
5.   Run ATI Winflash https://www.techpowerup.com/download/ati-winflash/   THIS IS THE MOST IMPORTANT STEP. Click SAVE to save your original rom!!!
6.   Run Polaris Bios Editor https://github.com/jaschaknack/PolarisBiosEditor  Open yours saved original rom. In the straps section copy 1:1750 strap on to 1:2000 strap. Also copy 2:1750 strap on to 2:2000 and 2:2250. I am not sure if you need to copy all these like this – but it worked for me. Save as modified rom file!!!
7.   Run ATI Winflash again click load and navigate to your modified rom and click Program. It took less than minute to program. When pops up to restart computer – restart it.
8.   Run MSI Afterburner – I have only changed Memory Clock to 2250MHz ( crashes when is more then that ) and set it up to start with Windows
9.   Run your miner. I am using Claymore https://github.com/nanopool/Claymore-Dual-Miner/releases

You can see here how my rig works and settings for Afterburner https://1drv.ms/f/s!ArSvoXaDMgNgbRF91Bsilby9zVg

OK, after setting every card individually you should set up now all to work together. First put two, then put the third card, fourth... and so on. After putting every card I have waited a while for Windows to run drivers ( you can see in processes when he is finished), and started my Claymore miner. Maybe you can set up whole six at once but, as I said, this is the way it worked for me. And that would be all for setting up your cards.

Recommendation would be to set up Windows not to update your drivers and not to update Windows at all. I have Windows 10 Pro, and I modified update behavior:

How to prevent windows to update drivers: http://www.itprotoday.com/windows-server/stop-automatic-driver-updates-windows-10

How to prevent windows system updates: https://www.windowscentral.com/how-stop-updates-installing-automatically-windows-10


If somebody thought everything went smoothly – hate to tell you – it was a real hell :-)
What went wrong:

1.   I had 2 bad extenders for graphic cards – one of them melted and made a lot off smoke. Never panic, always be near power plug so you can react fast on these occasions.
2.   Making two PSUs to work together also was a challenge. It was smoking again – not sure why, but it did burned one power extension for sata. I was using adapter like this one but with 5 connectors : http://www.thermaltake.com/Power_Supply/Accessories_/PSU_Cable/C_00002406/Dual_PSU_24Pin_Adapter_Cable/design.htm   
I have two EVGA PSU’s: EVGA SuperNOVA 1000 G3, 80 Plus Gold 1000W     and     EVGA 750 GQ, 80+ GOLD 750W  . I had problems to boot with them until I have changed order of attaching them on power cable extender. My extender has 5 connections, so it didn’t work until I have put EVGA 1000W on first – primary connection and EVGA 750W on the second one.
3.   Also, I had problem after setting up the fifth card - I couldn’t set up the sixth one. Windows recognized the whole six cards but miner was crashing. I have only 4GB of memory and that was the problem – you should set up page file on 16GB. Control Panel/System/Advanced System Settings , Tab Advanced, under Performance click on Settings, Advanced tab and under Virtual memory click on Change. Untick Automatically manage... and select Custom size. Also I have changed in BIOS settings for PCIe to use Gen2, and Multi core enhancement as in  video : https://www.youtube.com/watch?v=X9HMKsZJEyk    But I think setting up page file is enough
4.   Also what I needed to use was DDU http://www.guru3d.com/files-get/display-driver-uninstaller-download,1.html  to uninstall display drivers when installed the wrong one.


That is pretty everything. Except suggestion to change behavior for PSUs on power loss : https://www.youtube.com/watch?v=2Y442wSnEoY – restore on ac/power loss  = power on

and to put in Windows startup your miner: to copy miner in the startup in the run box type shell:startup and startup folder will pop up, just copy shortcut of your miner there.


Hope this will help someone :-) Thank you all for trying to help me and sorry for my English...