Use the following for a stable system.  I have 4 GTX-1080's and 4 RX-5xx running on one motherboard that can do 13 pice total.

[Power->Watts]
1380 -  1440

[Nvidia Windows, Device Manager]
23.21.13.9077

[Geforce Version, Nvidia]
390.77

[AMD Windows, Device Manager]
22.19.659.0

[AMD Setting->Software]
AMD Beta: 17.30.1029-170808a2-317304


[Hashrate]
220 - 350 Mh/s

PS: GTX's are far better per watt and there is where the improvements should be.

To:
drogasi and others

 We can help, but you have to provide some standard details that outline the systems os, mb, mem, hdd, cards, driver, and riser config in terms of power, where each riser has it own power not shared with any other device, ssd included.

Ensure you do these things.

1) Uninstall everything mining related whether DDU drivers, MSI Afterburner, etc.
    (A clean mining only slate. Don't be concerned with other apps)
 1a) Ensure that the motherboard has it's chipset drivers installed
2) Ensure you start with one card if your are having problems, otherwise
 when you re-install the "Mining" software reboot whenever requested.

I know that may seem like a lot, but I've been testing a few different mb, mem, pws and other hardware finding much of it fails if there not the right memory allocation and addressing in bios of both the mb and video card.  Sometimes the os will not assign a different address and the device is stuck to that address no matter which slot, other times the os will give a different address for some reason I haven't pin down yet.

I also mine on a lean Windows 10 os, much has been remove and it been take down to a working minimalist mining os.

I prefer to mine in Ubuntu but, there still is no linux mkxminer, Hmmm, hint, hint.



 

#######   Note  ########

You must you the Beta Blockchain Drivers, Radeon Software Crimson ReLive Edition Beta Version 17.30.1029 (Windows Driver Store Version 22.19.659.0), for a stable system.


I've tested all the drivers with Afterburner 4.4.2 and the above drivers produce a rock solid miner.


1) DDU
2) Install the above, all cards can be installed
3) Reboot & Restart
4) Run Miner


PS: Can't post the link to AMD's site!

First try not using --asm and set -I 20 (intensity).  if it works, you need to change your pagefile.sys file to 30000.
Restart.
Add back the --asm -I 21, then 22 and try 23.

The miner seems to be working great, better than any of the others I've tried so far.

3 x Rx580 = (1 x Sapphire + 2 x MSI) where one of the MSI is at 37Mh/s and the others lag behind.  I can't complained if I wanted to.  Hats off to the developer and I hope to get even better performance in the future.  It does appear the rate fluctuates a lot.   GPU Temp is about 8 to 5 degrees for selected point, which is fine.


No over clocking settings and using the following command:
mkxminer.exe --auto-fan --auto-gpu --temp-target 65 --asm -I 23 -o stratum+tcp://lyra2rev2.usa.nicehash.com:3347 -u %Wallet%.%Worker% -p x --exitsick --engine 1100 --memclock 2100 --vddc .975 --temp-target 55


[Current Hash Rate]
33.2MH/s 37.3MH/s 34.4MH/s | Temp(C): 55 53 52 | Fan: 85% 51% 80% | HW: 0 0 0 | Rej: 0.0%


[Nicehash Reported Rate] /w 2 gtx-750's running on desktops @ 5.4Mhs with CCminer
Lyra2REv2   107.52 MH/s   0.00 MH/s (0.00%)   0.0007   0.00034081

[Power]
592 Watts


PS: One request to be made, workout the proper fan speed to temp limit.  Seems a bit off for MSI 580's.
 Also please address the Dev fee, which we all want to know.