Unusually low hashrate on Sapphire 11265-07-20G Radeon NITRO+ RX 580 4GB

[njnear]

Let me go ahead and apologize up front.  I'm sure I'm about to ask a really dumb question, but here goes...

Before spending a tremendous amount of money building a mining rig, I thought I'd try to learn a little bit about mining.  So, I purchased a Sapphire 11265-07-20G Radeon NITRO+ RX 580 4GB (Elpida-Memory) for my Windows 10 machine.  (I intended to run it on my Linux server, but the power supply isn't large enough.)

When attempting to mine Ethereum using the "Claymore's Dual Ethereum + Decred/Siacoin/Lbry/Pascal AMD+NVIDIA GPU Miner", I get what I perceive to be very low hash rates. 

This is what the mining window looks like:


AMD Cards available: 1
GPU #0: Ellesmere, 4096 MB available, 36 compute units
GPU #0 recognized as Radeon RX 480/580
POOL/SOLO version
GPU #0: algorithm ASM
No NVIDIA CUDA GPUs detected.
Total cards: 1
ETH: Stratum - connecting to 'eth-eu1.nanopool.org' <213.32.74.157> port 9999
ETHEREUM-ONLY MINING MODE ENABLED (-mode 1)
ETH: eth-proxy stratum mode
Watchdog enabled
Remote management (READ-ONLY MODE) is enabled on port 3333

ETH: Stratum - Connected (eth-eu1.nanopool.org:9999)
ETH: Authorized
Setting DAG epoch #150...
ETH: 11/10/17-08:27:24 - New job from eth-eu1.nanopool.org:9999
ETH - Total Speed: 0.000 Mh/s, Total Shares: 0, Rejected: 0, Time: 00:00
ETH: GPU0 0.000 Mh/s
Setting DAG epoch #150 for GPU0
Create GPU buffer for GPU0
ETH: 11/10/17-08:27:28 - New job from eth-eu1.nanopool.org:9999
ETH - Total Speed: 0.000 Mh/s, Total Shares: 0, Rejected: 0, Time: 00:00
ETH: GPU0 0.000 Mh/s
ETH: 11/10/17-08:27:42 - New job from eth-eu1.nanopool.org:9999
ETH - Total Speed: 0.000 Mh/s, Total Shares: 0, Rejected: 0, Time: 00:00
ETH: GPU0 0.000 Mh/s
GPU0 DAG creation time - 17145 ms
Setting DAG epoch #150 for GPU0 done
ETH: 11/10/17-08:27:48 - New job from eth-eu1.nanopool.org:9999
ETH - Total Speed: 1.154 Mh/s, Total Shares: 0, Rejected: 0, Time: 00:00
ETH: GPU0 1.154 Mh/s
ETH: 11/10/17-08:28:03 - New job from eth-eu1.nanopool.org:9999
ETH - Total Speed: 4.128 Mh/s, Total Shares: 0, Rejected: 0, Time: 00:00
ETH: GPU0 4.128 Mh/s
ETH: 11/10/17-08:28:08 - New job from eth-eu1.nanopool.org:9999
ETH - Total Speed: 4.128 Mh/s, Total Shares: 0, Rejected: 0, Time: 00:00
ETH: GPU0 4.128 Mh/s
ETH: 11/10/17-08:28:16 - New job from eth-eu1.nanopool.org:9999
ETH - Total Speed: 4.128 Mh/s, Total Shares: 0, Rejected: 0, Time: 00:00
ETH: GPU0 4.128 Mh/s


From all accounts, I "think" I should be getting around 25 Mh/s, but of course I'm no where near that.

Also, for reference, this is what my startup batch file looks like:



setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_SINGLE_ALLOC_PERCENT 100

EthDcrMiner64.exe -epool eth-eu1.nanopool.org:9999 -ewal 0x7750c68f401341971f29de73f497f6c1872e80bc/njnear/xxxxxx@gmail.com -epsw x -mode 1 -ftime 10



I've gone through several cycles of GPU BIOS updates, though I don't think that is the problem.  The BIOS updates seem to be geared more toward "tweaking" performance on the high end and I was getting really poor hash rates even with the stock BIOS.  Could I ask ask someone point me in the right direction?  I feel like I'm missing a critical step here but I don't see what it is.

[Vann]

Do a clean install of the AMD blockchain drivers after running DDU in safe mode. Set the core clock to 1150 MHz  and memory to 2100 MHz in Afterburner. With that you should get between 19-25 MH/s with the stock Bios. You can Bios mod the card with the 'one click timing patch' performance timings in Polaris Bios Editor v1.62 if you want to get 29+ MH/s with the same settings.

https://support.amd.com/en-us/kb-articles/Pages/Radeon-Software-Crimson-ReLive-Edition-Beta-for-Blockchain-Compute-Release-Notes.aspx

https://github.com/jaschaknack/PolarisBiosEditor

[njnear]

I think you just hit my problem on the head.  I was using stock drivers and had not heard of the blockchain drivers.  Let me give that a shot.  Will report back on my progress.

[njnear]

That did the trick.  I'm now mining at 22.628 Mh/s. 

I somehow missed that there was a different driver for blockchain operation. 

Thank you for getting me over the hump.  Do you have a bitcoin address I could tip?

[Vann]

Glad to hear it helped You can also undervolt the core -100 mV and set the power limit to -15% in Afterburner to save on power. Also check and see if there are GPU memory errors using HWinfo. If there are any, you can lower the memory clock by 25 MHz until there are none.

[njnear]

Thank you so much!  You really helped me over the hump!  I'm having all kinds of crashes and reboots, but I'm having fun!  I'll figure it out, I think.  You've given me a great set of resources to look at!

I'd really like to send you a bitcoin tip of a few bucks.  Your time and knowledge was certainly helpful to me!

[Vann]

The settings above should be stable for most RX 580 cards. Glad to pay it forward, there are lots of developers like jaschaknack that are more deserving for the contributions they make.