1 GPU Disabled on Titan Z after Titan Black Install

[SuperMike]

Folding@Home was running on my 6950X and Titan Z just fine, 3 folding slots at just at or under 1 million PPD.

Installed a Titan Black as primary card and moved the Titan Z down to the next 16x PCIe slot.

The idea was the extra clock and cooling on the black would result in a few more frames, while keeping the Z down in the cooler air.

They are connected with an SLI bridge, both GPU 1&2 show 8.0GT/s in HWInfo, GPU 3 shows 2.5GT/s.

 

Removed & Reinstalled F@H to configure it.

The F@H client now shows one GPU disabled on the Titan Z, confirmed by the GPU temps in HWInfo.

 

Any tips to get both GPUs on the Titan Z running again?

 

[Grabhanem]

Have you tried taking off the SLI bridge? I'd kinda suspect that the Titan Z thinks it's supposed to be SLIing as a single Titan Black.

 

Also, are you sure the slot you have it in offers a full x16 of bandwidth?

[SuperMike]

I haven't tried removing the SLI bridge, as F@H should just ignore it.

HWInfo64 shows 8.0 GT/s bandwidth on both GPU 0&2 and 2.5 GT/s on GPU 1 (wrote 12&3 the first post in error.)

I don't want to abandon the current jobs, I'll let them finish and try removing the bridge.

[SuperMike]

Removed SLI bridge, reinstalled F@H, no change.

Nvidia driver settings also show PCIe 3.0 X16 on both cards.

[SuperMike]

Reinstalled the Nvidia drivers, problem solved.

 

The Z is in SLI, but not the black. 

Need to figure out how to make that happen next, now that DifferentSLIAuto doesn't work anymore.