Help... Ethminer mining with more than one GPU

[molitar]

Ok my RMA'd 3GB 280x card came back as a 4GB 380x card.

So I now have a 3GB R9 280x and a 4GB R9 380x card.   The cards by themselves are hashing average of 18-22 MH/s but I than tried both cards I am not seeing a hash difference at all.. I have tried to use it this way and I see both but my hash value is not going up.

ethminer.exe --farm-recheck 200 -G -F http://coinotron.com:3342/molitar.miner1:pass --cl-local-work 256 --cl-global-work 16384

So I have also tried ....

ethminer.exe --farm-recheck 200 -G -F http://coinotron.com:3342/molitar.miner1:pass --cl-local-work 256 --cl-global-work 16384 --opencl-devices 0,1

but than I only see gpu miner 0 and not gpu miner 1.

What is the proper way to mine with both cards?

[Charloz24]

If your are in windows:

1) Open control panel, device manager, are the 2 card there without an ! mark? If not, try to reinstall catalyst driver (15.12)

2) run ethminer --list-device, are your 2 card listed?

[philipma1957]

If your are in windows:

1) Open control panel, device manager, are the 2 card there without an ! mark? If not, try to reinstall catalyst driver (15.12) (un install it first)

2) run ethminer --list-device, are your 2 card listed?

yeah it is most likely a driver issue


I always like msi afterburner as it helps with multiple gpu settings

and if the gpu's look wrong you need to uninstall the amd driver package then reinstall it then check it with msi afterburner.

In fact I had this issue this morning with a rig holding a r7 370 and a r9 380

The r9 380 was really weird   and the r7 370 was fine.

so I went to msi afterburner looked at my 2 gpu's and the r9 380 was locked on every setting.

not right = corrupted amd drivers (common problem)

I went to program uninstall pull out the amd driver I went to amd 15.12 download link  re installed the drive.

I check msi afterburner  and I could now alter the fan speed the clock on the r9 380  so I knew it was fixed.

I am now mining with both cards.

[molitar]

Drivers show fine but will reinstall.. The list devices shows both of the cards.  So we'll see if reinstall of the 16.4.1 drivers help.

[Unacceptable]

Drivers show fine but will reinstall.. The list devices shows both of the cards.  So we'll see if reinstall of the 16.4.1 drivers help.

Those drivers= lower hashrate.Do like Philipma said 15.12 or the ones that work best for MY Sapphire 380 4gig were 15.15.1004  

http://support.amd.com/en-us/kb-articles/Pages/AMD-Radeon-300-Series.aspx#

Go to this section:
The AMD Catalyst™ Driver for AMD Radeon™ 300 Series products can be downloaded from the following link:

        AMD Catalyst™ Driver for AMD 300 Series for Windows 7 64Bit and Windows 8.1 64Bit

[molitar]

Thanks I have installed the 15.12 and doing better but my ethminer.exe starts crashing until I reboot.

Faulting application name: ethminer.exe, version: 0.0.0.0, time stamp: 0x55f6a1a3
Faulting module name: MSVCR120.dll, version: 12.0.21005.1, time stamp: 0x524f83ff
Exception code: 0x40000015
Fault offset: 0x0000000000074a46
Faulting process id: 0x180c
Faulting application start time: 0x01d196c245cc47aa
Faulting application path: C:\Ethereum 0.9.92\Release\ethminer.exe
Faulting module path: C:\Windows\system32\MSVCR120.dll
Report Id: 865d8bcd-02b5-11e6-806a-001986000e8f

[molitar]

Ok the problem was I still had ethminer 0.9.92 version. Just downloaded the latest cpp ethminer 1.2.3 and it's now hashing good. But now I think I need to create a new DAG file after all this headache as I am getting quite a few invalid's.