Topic: cgminer hangs (Read 1611 times)

Either your Windows and software install is having issues, your RAM is having issues or your GPU is having issues. Does the 6990 report the VRM temp? I know the 6950 and 6970 do, and it could be that your 6990's VRM is overheating.

It's also possible that the second GPU is dying; this was very common with the 5970s.

Thanks for the reply,


I will go play around with the settings.
I have been mining with the 6990 for 3 month now, and it used to go good, even with both cores mining.
But sins i have a fresh install of windows it only worked with one core.

But again thanks for the tips, i will go en play around with my settings.




Greets Boneee

The only other suggestion I would say is try dialing down your intensity and/or your thread concurrency.  Maybe the card is being pushed too far.  Just because one person is able to get those settings working with their 6990, doesnt mean you will be able to.  All about the luck of the draw with the quality of the chips.

Also, when mining ltc, you need to be using scrypt and you are most worried about thread concurrency, intensity, and gpu memclock.  For btc mining, no scrypt, and you are worried about gpu engine and intensity.  So ideally you will need two different lines depending on which you are mining.  For example:

Radeon 5870, assuming it is the second video card in my case.

For LTC: --scrypt -o -u username -p pass -d 1 --gpu-memclock 1200 -w 256 -I 15 --thread-concurrency 7164 --auto-gpu --auto-fan --temp-target 75 --temp-overheat 85

For BTC -o -u username -p pass --gpu-engine 800-950 --gpu-memclock 300 -I 12 --auto-fan --auto-gpu --temp-target 75 --temp-overheat 85

Thanks for the reply,


Forget to say i mining both scrypt and bitcoin, and both hangup.
I will look in to using memory settings in the shortcut.
But have a question about not using the 0 -d 0 part in my shortcut.
I have 2 gpus (well 3) one radeon 6990 and a radeon 5750.
But i only want to mine with the 6990, what commend do i use so that the 5750 wont be used for mining? Edit: Have it working with just the radeon 6990, now have to see if i keeps mining or hangs up.
Edit: It still hangsup when using just one shortcut for the 6990.

Edit: I do have the artic cooling on my radeon 6990, the do cover the mem chips.


Greets Boneee

You actually are overclocking in those settings, just not overclocking the GPU.  You are scrypt mining which uses more VRAM than it does GPU power.  Unlike your GPU, your VRAM on your cards do not have a active cooling system, so you have to make sure you have good case airflow to keep them cool.  A nice case that you can stick a couple of 120mm fans on the side to blow across the video cards would be ideal.

I also noticed you are not using any memory clock arguments. You might want to tweak those as well.  I dont know what the optimum settings for your cards, but you can easily look them up.  Then just add the argument to your command line, i.e. --gpu-memclock 1200

Lastly, you appear to be using two different command lines to connect to the same pool, using the same settings.  You can use just one command line for this.  Just take one of those lines, and remove the -d 0 or the -d 1 in one of the lines.  These arguments tell cgminer to only use one of the cards (either the one is slot 0 or slot 1), but if you are using them both at the same time, doing the same thing, then you can have it run both.  Since they are the same cards, the worksize settings, memclock settings, and everything else do not need to be changed and cgminer will apply those settings to all cards.

Thanks for the reply,

When m,ining the temps are normal in aftherburn and cgminer.
But when i hangs then aftherburn shows a temp in the minus, with cant be real.


I did make a shortcut for mining, but didn'd use a config file for cgminer. have to look in to that.
The sortcut a made is:

C:\cgminer-3.4.3-windows\cgminer.exe --scrypt -u User -p Pass -o  pool+port --gpu-platform 0 -d 0 -w 256 -v 1 -I 18 -g 1 -l 1 -T  --thread-concurrency 8000

C:\cgminer-3.4.3-windows\cgminer.exe --scrypt -u User -p Pass -o  pool+port --gpu-platform 0 -d 1 -w 256 -v 1 -I 18 -g 1 -l 1 -T  --thread-concurrency 8000


But have no idea how to do the overclocking with cgminer.


Greets Boneee

What temps are being reported in cgminer?  I would take my temp readings from there and not Afterburner.  In fact, uninstall Afterburner and dont even use it, cgminer will do all the tweaking you will need right from it.  Just learn a little command line or how to format a config file and you are good to go.

thanks for the reply.

Already whas thinking about the problem being the amd driver.
I have tryed 3 driver 12.8, 11.8, and 13.4.
But there is on more thing i saw, when cgminer hangs up and i look at msi aftherburn i see a temp that is in the minus -
What driver should i try ?




Greets Boneee

Hallo All,

i have a radeon 6990
i have a question i am mining with cgminer, and it works.
But when i use both the gpu's from the 6990 cgminer hangs-up after some time, this can be in 5 min or within the hour.
And one any idea what can cos this behaver in cgminer ?



Greets Boneee