Windows Multiple GPU

[Jarredm]

So I am having trouble getting two GPUs running in windows.  I am wondering if there is a secret! 

I have a 6870 that is installed and running with poclbm with guiminer.  I also have a 4870 card in the board's second x16 slot.  The device manager see the card and correctly identifies it. However, when I run poclbm in command line mode I only see [0-0] Barts as well as the CPU. I have also noticed that there is no mention of the 4870 card in CCC. I believe that I'm missing something basic since this is my first attempt at multiple GPUs on a mobo.

[1714128078]

1714128078

[1714128078]

1714128078

[1714128078]

1714128078

[saadtariq30]

connect a monitor or a dummy plug to your 4870..without that CCC wont load it up

[Jarredm]

connect a monitor or a dummy plug to your 4870..without that CCC wont load it up

Ah!  Now all those dongles on the GPUs in the pictures here make sense!  I have seen pictures of a jumper wire between two pins on a DB15 VGA connector/adapter.  I assume that this takes care of the presence detection for the card?  Can someone fill me in on what pins to jump?

[saadtariq30]

THOSE ARE NOT JUMPER WIRES!!! They are RESISTORS!

here you go: http://www.overclock.net/folding-home-guides-tutorials/384733-30-second-dummy-plug.html

[Jarredm]

THOSE ARE NOT JUMPER WIRES!!! They are RESISTORS!

here you go: http://www.overclock.net/folding-home-guides-tutorials/384733-30-second-dummy-plug.html

Thank you so much!  You have saved me ruining a card!  Send me your address and I'll drop you a bit of gratuity.  I'll check out that link and see if good'ol radioshack has the correct resistance size.

[saadtariq30]

No prob pm me whenever you need any help.

[stellan0r]

---> http://forum.bitcoin.org/index.php?topic=16816.0    :-)