Tesla K80 with standard mother board for dual GPUs with Titan X

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Hi, I’m working for the title’s issue, and set up Titan X for the GPU ID 0, and it works. (it is in nvidia-smi command output)
But the K80 that is installed at second PCI express in the mother board does not work properly.

lspci -vvv | grep -i nvidia

shows below output

04:00.0 3D controller: NVIDIA Corporation GK210GL [Tesla K80] (rev ff) (prog-if ff)
	!!! Unknown header type 7f

05:00.0 3D controller: NVIDIA Corporation GK210GL [Tesla K80] (rev ff) (prog-if ff)
	!!! Unknown header type 7f

Anyone who knows about this?
Is that impossible to use tesla K80 with arbitrary mother board?