Only 5 of 6 GPU's - 1070 FE's

[Upstager]

http://zempafy.com/build-ethereum-mining-rig-also-dual-mining-capable/
That is everything my rig is built with, except I added 3 new GPU's today, identical to the first 3.

5 of my GPU's are running fine, but the 6th isn't found anywhere. I've swapped cables ets but nothing.
It doesn't show in Device Manager or Nvidia Control Panel.

Just doesn't seem to exist.

I'm so close to having this whole thing dialed in to 32 MH/s per card and I just need my last card working!!!!!! Argh!

Any advice from the pros?

[Upstager]

Hmmm,
 Ill keep digging...

[Elder III]

My advise is to buy a motherboard that is made specifically for mining. The vast majority of motherboards will never work with 6 GPUs, and the ones that do are usually a finnicky pain in the ass. Since I haven't ever used that specific motherboard I don't know if there are any specific bios tweaks that will allow all 6 GPUs to be detected.

If that guide was written by you about the PC that you're asking for help here... then you should remove it. Don't put a guide on the internet if your build isn't working to begin with.

[joshuaj]

So, do you mean that you swapped 6th card to other slot, and this 6th card works? Or do you mean that you swapped card away from this 6th slot, and this 6th slot works?

Scope down the issue and you will know the problem.

[papampi]

Whats your Mobo ?
Have you updated the bios ?
Do you set peg0 and peg1 to ver 1?
Do you set above 4g/mining compatible in bios ?
Have you disabled fast boot in bios ?
Also check if Windows in installed in UEFI mode, not Legacy!!!