Bitcoin Forum

Hi i recently mined with a 5870 on 420 m hash and it worked fine.

Now i put on 2 more 5850 and installed a dummy plugin http://www.overclock.net/folding-home-guides-tutorials/384733-30-second-dummy-plug.html.
But the gui miner only sees the 5870 wich is connect to the main monitor what am i making wrong?

http://imageshack.us/photo/my-images/849/vgabuchse.jpg/ This is how i put the resistors in.

that just looks like pieces of wire to me? edit just looked at it again is that done in paint over a pic? can you take a pic of the one you made? did you use the right resistors?
can you see the cards under device manager?

you only need 1 resistor between 1 and 6.  Make sure it's around 60 - 100 ohm (doesn't have to be exact).

Have you tried connecting the monitor to one of the the new cards and checking it works that way - that would allow you to determine if the problem was with the null plug or something else.

Will

If i switch the monitors its works fine i use 75 ohm transistors

Your link to cyberdruid's post on OCN will work fine for dummy plugs, its what I used, works fine.

As for your problem, I had the same issue... If you're in XP, right click the desktop, properties, settings, then enable extended monitors on the other cards. Once you do this it'll let the miner be available for a guiminer or whatever.

If you're in vista or 7, right click the desktop and hit personalize, then go into display settings, and enable extended monitors. 1 per card if I remember right.

If you right click on my computer, hit manage, and go to device manager, does it show all of the cards under display adapters?

Alright, I'm running windows 7, this does not work for me and yes device manager shows all my video cards.  I'm running 4 cards on one system.

I can get a card to show up if I physically plug a monitor into it, but the dummy plugs are not working they doe not see a monitor so I can use my video cards for mining.

Do you have any other suggestions?

Are you absolutely sure you have used the right type of resistors?
What are the color bands on them? Even better take a picture of the resistors when plugged in so we can rule that out.

I think is a dummy plug problem... picture of resistors would be cool.

I tried two different resistors, first small 68 ohm with low W rating, was hard to get them to work.

then I tried again and bought a couple of these babys

http://www.conrad.de/ce/de/product/419435/WIDERSTAND-METALL-1-W-1-82R-BF-0414/0241230&ref=list (http://www.conrad.de/ce/de/product/419435/WIDERSTAND-METALL-1-W-1-82R-BF-0414/0241230&ref=list)

yeah it's german, but you get it. 82 ohm, 1 W. and you have a picture.
has pretty thick wires and i was able to push one with little force directly into the dvi port of my 6870's (like this: http://blog.zorinaq.com/?e=11 (http://blog.zorinaq.com/?e=11) ) - try what orientation works best for you, make sure the resistor wires actually meet the metal parts of the port (use a flashlight to see them if in doubt).

it worked like a charm - virtual screens poped up in the windows desktop manager even while the computer was running ;)

anyway I switched to Ubuntu a day later.. don't need the resistors anymore right now ^^