Finally with lots of trail and more error, got my Z640 & P100 Running

From a hacked together foam bracket and adapters on adapters , we have life. Now I need to refine this so I dont burn my house down and the fan does not run 100% 24/7.

For anyone else who needs this.

• Yes you can use the G1 and G2 power cables, adapted together to power the P100. You need this: Dual 8pin to 8pin PCIE Power Cable For NVIDIA Tesla K80 M40 M60 P40 P100 GPU
• You need to retain a display out GPU or it wont boot- Use slots 2 and 5.
• You can fit a rear fan (I think) and just unplug front fan (bottom right of MOBO) to power it. Need to disconnect blue cable to ensure fan runs 100% 24/7