3 GPUS with Gigabyte 970A UD3 possible?

[XETTAP]

Hi all,

today my 3rd GPU arrived so i connect the third one via usb Riser to the PCI ex 1x. Now the Gpus connect to PCI express 1x Pci express x16 an pci express x4.  After i jump the Mainboard the fans went on and i proceed to setup the system. I open the Nicehash Miner to see how many GPU are detected. I  see only 2 of 3 GPUs. Why it cant detect/show the third gpu unit? Any suggestions?

Thank you in advance!

System:                   Gigabyte 970A UD3 v1.1, AMD FX4100 / 8 GB RAM, 3 x Asus R9 280 DUC2

[Ambros]

which OS are u using ?
Does it recognise all cards correctly?

[suggsy89]

I have the 970A UD7, it should detect fine, make sure all the cables are secure and reinstall drivers.

[XETTAP]

which OS are u using ?
Does it recognise all cards correctly?

im using Win 7 64 Bit. I think it has detect it. When the destop show up it began to install the driver but i check the device manager after restart show nothing new.The 3rd GPU is working like the other two. Power and fan is on. May i have missed something?

[Ambros]

which OS are u using ?
Does it recognise all cards correctly?

im using Win 7 64 Bit. I think it has detect it. When the destop show up it began to install the driver but i check the device manager after restart show nothing new.The 3rd GPU is working like the other two. Power and fan is on. May i have missed something?

Is the video cable plugged into the new installed GPU?

[suggsy89]

Swap so the new one is the main video output?

[XETTAP]

which OS are u using ?
Does it recognise all cards correctly?

im using Win 7 64 Bit. I think it has detect it. When the destop show up it began to install the driver but i check the device manager after restart show nothing new.The 3rd GPU is working like the other two. Power and fan is on. May i have missed something?

Is the video cable plugged into the new installed GPU?

yes i delete AMD software to reinstall the drivers again with Radeon Software Crimson ReLive Edition Graphics Driver Installer for Windows 7 64-Bit. The output is on the new GPU wich i connect with a USB riser adapter to the PCI-e(nearest to the cpu)

Update: Treibers installed, Screen connect to new GPU but GPU cant be seen anywhere..