My build is listed below and it is the first time I am doing a build with these components together. Previously, I have only put together AMD rigs which in comparison seem much easier due to more DIY documentation among other things. I have assembled the rig properly to the best of my knowledge but this build was far different mainly because of the dual power supplies. 3 of the GPU's do not seem to turn on and the 3 system fans also do not turn on. I plugged the 3 case fans into the 4 pin system fan slot next to the CPU fan slot on the motherboard and it is also connected by one of the Perif cables from the PSU. I at first thought that it was the mobo splitter cable that I used to connect the two power supplies to the motherboard but I'm still not sure. I believed that it was supposed to power up each of the PSU's at the exact time but maybe I was wrong. The odd thing is that the CPU fan turns on but that could be powered by the PSU that does seem to be functioning. I have 3 of the 1080 TI's on one PSU and 3 PSU's, fans, CPU, and SSD power on the other PSU. The one that isn't functioning is the one that has more things connected but my calculations say it should be fine. Anyways, this seems long but any help on this would be greatly appreciated.
Case-Graymatter 3.0
Motherboard-Biostar TB250 BTC
CPU-I3-6100 Skylake
RAM- G-SKILL-Ripjaws-V-Series-16GB-2x-8GB-288-Pin-DDR4-2400-PC4-19200-Intel-Z170-X
PSU- 2x EVGA 1000W G2
SSD-Sandisk 120 GB
GPU's-6x Asus NVIDIA ROG Strix GeForce GTX 1080 TI OC Gaming 11GB GDDR5X
This is the PSU splitter cable I used.
http://www.ebay.com/itm/24Pin-20-4pin-Dual-PSU-ATX-Power-Supply-Adaptor-Cable-Connector-For-Mining-30cBR/122567226625?ssPageName=STRK%3AMEBIDX%3AIT&var=422991878669&_trksid=p2057872.m2749.l2649http://imgur.com/OAFv3gL*edit* Should I just use add2PSU? Does anyone have any experience with that product?