Why wont BFGMiner recognize my second card?

[maplema]

I have dipped my toe into the mining pool and started mining on my GTX 680 desktop when not gaming on it. Not surprisingly it is too slow so I purchased a second card (AMD HD 7770) to be a dedicated miner. BFGMiner isnt regognizing my card and I dont know why (since I am new). Below is a screen of the output of my miner.

Is there something I need to alter in the config file to get it to recognize a second card? At the moment all I am getting is the 680. please help me out.

http://i3.photobucket.com/albums/y87/maplema/bfg.png:original

[maplema]

bump

[Larynth]

this is an issue with your OS if you have incompatible Cards installed it will only recognize the first card. You will have the same issue with the AMD APU's if you add a card that cant go dual mode with the APU you loose it. The best option i can think of (not positive it will work) other than the obvious pull the NVidia card out is to load a second OS (Linux) to a partition or a thumb drive and only support the AMD card with drivers on that OS.

[maplema]

I have a second computer (my son's) with an AMD card already running. Would I be able to move the second card into it and get it to work as a dedicated miner?... or would they have to be identical cards (i,e, both 7770's)?

[Larynth]

You would have to research that with AMD, I'm not sure what the tolerances are for X-fire but if not the same GPU probably very close, For instance I know the APUs can be Dualed with more than one GPU type each, but Dual is different from X-Fire. A good place to get info would be the developer's forum for open GL at AMD's site not sure of the URL.

[Timzim103]

Is it possible your second card is just disabled?

As a test, try and plug both cards into monitors and see if that changes things...

If that's fixes it, make a dongle as described here:

http://www.techpowerup.com/forums/showthread.php?t=86507.

or here:

http://blog.zorinaq.com/?e=11

There's probably a solution better than dongles, but that's I have right now...

Hope that helps.

[Larynth]

Not sure about BFGMiner but with CGMiner and poclbm if the card is installed and recognized by the OS it will be seen by the software. Since the miner runs within the OS ...... if the OS doesn't see the second card do to a driver incompatability conflict i don't see how tricking the card into giving a false positive on the "monitor connected" boolean value would help since that value is read by the driver then interpreted by the OS which then allows the hardware to be seen by the miner.

[maplema]

Is it possible your second card is just disabled?

As a test, try and plug both cards into monitors and see if that changes things...

If that's fixes it, make a dongle as described here:

http://www.techpowerup.com/forums/showthread.php?t=86507.

or here:

http://blog.zorinaq.com/?e=11

There's probably a solution better than dongles, but that's I have right now...

Hope that helps.

Nope... I plugged this card into the second DVI input on my monitor (so the 680 is on DVI-1 and the 7770 is on DVI-2) and BFGMiner will still not recognize it even though my OS will. I can perform work on both cards but BFG will not see it or mine on it...

thanks for that link though... bookmarked!! Didnt know you could make something like that!

Not sure about BFGMiner but with CGMiner and poclbm if the card is installed and recognized by the OS it will be seen by the software. Since the miner runs within the OS ...... if the OS doesn't see the second card do to a driver incompatability conflict i don't see how tricking the card into giving a false positive on the "monitor connected" boolean value would help since that value is read by the driver then interpreted by the OS which then allows the hardware to be seen by the miner.

Just downloaded and set up CGIMiner and same thing... screenshot below

http://i3.photobucket.com/albums/y87/maplema/cgi.jpg:original

Edit: .... I have downloaded GUIMiner and it will run it just fine. Dont know why BFG and CGI wont detect it but at this point I dont care anymore. Im willing to have another window cluttering the screen at this point... so frustrated lol

http://i3.photobucket.com/albums/y87/maplema/gui.jpg:original

[Timzim103]

Not sure about BFGMiner but with CGMiner and poclbm if the card is installed and recognized by the OS it will be seen by the software. Since the miner runs within the OS ...... if the OS doesn't see the second card do to a driver incompatability conflict i don't see how tricking the card into giving a false positive on the "monitor connected" boolean value would help since that value is read by the driver then interpreted by the OS which then allows the hardware to be seen by the miner.

It was worth a try. https://bitcointalk.org/index.php?topic=28402.9300

I couldn't get my Linux box to detect my second card without having both cards connected to my KVM.

Whether its a driver issue or something else, the dongle solved it. It works fine now.