GPU in 2nd PCI-E x16 Slot Not Showing Up

[the_joey_o]

I just put in 2 new ATI 5770s into my machine. 1 is in my second PCI-E x16 slot. The other is attached by an adapter to my PCI-E x1 slot. I previously installed an ATI 5770 card in my first PCI-E x16, which has been working fine. The card in the PCI-E x1 slot is working great, but the card in the second PCI-E x16 slot isn't. I'm running Windows 7. The second x16 card has shown up in my Display Adapters in the Device Manager, but I can't find it in GUI Miner. Both new cards have dummy plugs that I made myself. Anybody know what's going on here?

[1715014117]

1715014117

[the_joey_o]

Dumb mistake. Cost me a couple hours of my night, but I figured it out. I had the dummy plugs resistors on that card backwards. My dislexia strikes again...

[yigga]

hey there...i'm facing almost the same problem. *bump*

have a hd5770 running on my mainboard (asrock k10n78FullHD-hSLI) in the pci-e x16 slot. (first monitor connected to this gpu DVI)

now i wanted to put another hd 5770 in the pci-e x1 slot (with a raiser 1x to 16x) but my win7 64bit wont recognise the second gpu. I have a tft connected to the second card as well with a VGA to DVI adapter.

What am I doing wrong? couldnt find anything. Or is it simply impossible to cennect an other gpu?

EDIT: the second card doesnt show up in harwaremanager...and its not possible to enable second screen in diplay properties

[carbolic]

If it doesn't show up in Device Manager, then it's probably not related to a dummy plug. The card should show up in device manager as "working properly", but Windows will consider it "disabled" until it senses a monitor attached.

Try replacing your main video card with this one to see if the card is bad or something else. You could have a bad card, a bad driver (try reinstalling the drivers), or a bad motherboard (or the slot is somehow disabled).

[yigga]

reinstalled driver sveral times...no effect...

both cards work in the pci-e x16 slot...so the card is fine.

now i think the riser may be broken. i tried putting the riser to the gpu and pluget into the green pcie x16 slot. as a result i got a black screen.
it seems that the riser is broken or wouldnt it work in the x16 slot anyway?

can anyone confirm wheather or not a riser would work in the pcie x16 slot!?