How to enable Crossfire in GUIMiner?

[favelle75]

I have two 7770's in CrossFire, but for the life of me I can't get GUIMiner to use both of them.  In the "device" drop down menu, it shows both of them, but how do I get them to run at the same time?

[favelle75]

I think I solved it.  I just opened multiple instances of GUIMiner and chose one 7770 in one and the other 7770 in the other one.  Seems to be working because when I change the OC on either card, it affects the hash rate independently. I'll see how my shares add up though to make sure its working.

[nwoolls]

I have two 7770's in CrossFire, but for the life of me I can't get GUIMiner to use both of them.  In the "device" drop down menu, it shows both of them, but how do I get them to run at the same time?

You can create a new "miner" from the File menu, or duplicate your existing miner in GUIMiner by right-clicking the tab and clicking Duplicate. Setup one miner for one card, and another for the other. Then click View>Show summary and you can start/stop the miners from there.

Here's a picture of the final setup in case it helps. I'm also using the OS X version of GUIMiner so hopefully the steps are the same for you.

[favelle75]

Looks good.  What GUI interface do you have because mine looks nothing like that.

Mining at 2x 185Mhash/s....everything seems to be going good!  Thanks. 

[os2sam]

I have two 7770's in CrossFire, but for the life of me I can't get GUIMiner to use both of them.  In the "device" drop down menu, it shows both of them, but how do I get them to run at the same time?

I have heard that you don't want to enable crossfire for mining because it will limit the performance of one GPU, or something like that.

[favelle75]

Yeah, I do have CrossFire enabled in CCC though and it still works....but in GUIMiner, I treat the cards as separate. I am getting the fulkl 185-188Mhash/s from each card though, so I am happy.