unfortunately i cant run the the 3rd GPU on my old Motherboard so i get the MSI Z97 Gaming 5 to solve that problem but WTH? Same Problem as before? I connect the 2 GPUs directly on the Mobo (that works) and then the third one on the first PCIE1x via USB Riser Cable:
USB Riser Cable:https://www.amazon.de/ELEGIANT-Express-Extender-Adapter-Mining/dp/B01HHLQRBK/ref=sr_1_1?ie=UTF8&qid=1482518245&sr=8-1&keywords=usb+riser
Connecting the 3rd GPU to PCIEx1 will not run the GPU (GPU LED ON, FAN OFF).
Actual Rig: http://imgur.com/a/Vv69p
MSI Z97 GAMING 5 Intel Celeron 2x 2,8GHZ
3x ASUS r9 280 3GB
1x Be quiet 700W (power 2 GPU which are directly on Mobo)
1x Be quiet 550 W ( power 1 GPU which is connected via
Anyone had this issue too? How can i fix that? What should i check next. I appreciate every help!