Can't get 3rd R9 290 working

[dealwithitdoge]

windows 7 home prem. 64bit

yes the fan spins on all 3 cards.
system information appears to recognize 3 cards are attached to pci-e slots.
device manager however disagrees, and only shows 2.
cgminer agrees with device manager, and only hashes w/ 2.


repeating an old question although it hasn't been brought up in a while: how do i disable crossfire? i was told it's software crossfire, no jumper required... and that it's on by default.

[Starscream]

Not sure about how to disable Crossfire, but! I do remember I needed to disable ULPS (Ultra-Low Power State), what it basically does is disable cards that are not in use, so by disabling ULPS you make sure that all cards work at all times.

To disable ULPS:
1. Go to the registry ("regedit" in windows search - make sure you open it as admin).
2. Make sure "Computer" is highlighted and than go to Edit -> Find -> EnableULPS
3. Double click on EnableULPS on the right side and change its value to 0 (Hexadecimal base).

Restart PC and check to see that the registry was saved (again, make sure you access regedit as administrator).

[orpington]

I had the same issue temporarily. 1 card didn't seem to like the 1x to 16x riser in the 16x slot. Plugged it directly into the mobo and then no probs.

[orpington]

If all 3 cards fit (they do on my mobo) did you try putting all 3 directly onto the mobo? (temporarily of course)

[dealwithitdoge]

Not sure about how to disable Crossfire, but! I do remember I needed to disable ULPS (Ultra-Low Power State), what it basically does is disable cards that are not in use, so by disabling ULPS you make sure that all cards work at all times.

To disable ULPS:
1. Go to the registry ("regedit" in windows search - make sure you open it as admin).
2. Make sure "Computer" is highlighted and than go to Edit -> Find -> EnableULPS
3. Double click on EnableULPS on the right side and change its value to 1 (Hexadecimal base).

Restart PC and check to see that the registry was saved (again, make sure you access regedit as administrator).

value of 1 would be on. i set it to 0 and i'll try it out in a bit. hopefully this works

If all 3 cards fit (they do on my mobo) did you try putting all 3 directly onto the mobo? (temporarily of course)

i dont think all 3 cards fit. haven't tried since it would be unrealistic to use 3 290's all unpowered (or at least that is my assumption)

[Starscream]

value of 1 would be on. i set it to 0 and i'll try it out in a bit. hopefully this works

Yes yes, my mistake, I meant to type 0 there.