Black screen after installing a new NVIDIA Titan Xp with an old GTX 1080

Junnnn

Commendable
Mar 18, 2016
18
0
1,510
Hi, my computer has an old GTX 1080 which I bought 2 years ago. I recently get a new Titan Xp. Can I install two different GPUs on the same machine and use them for deep learning algorithms? I don't play games and I don't need SLI. I just use GPUs for calculations.

If I installed either one of them, it worked normally and the linux command "nvidia-smi" can detect either one of them. That indicates both of the GPUs are good, and the rest parts of the machine are also good. But when I installed both of them I got a black screen and I cannot do anything. Can anyone help me to solve the black screen problem?

I just updated the NVIDIA driver to 387.34 which supports both Titan Xp and GTX 1080 in the NVIDIA website.

Here are some configurations.
OS: Ubuntu 14.04
CPU: i7 5820k
Mobo: MSI X99A Raider http://www.newegg.com/Product/Product.aspx?Item=N82E168...
RAM: 32GB (G.SKILL (4 x 8GB) 288-Pin SRAM DDR4 2400) http://www.newegg.com/Product/Product.aspx?Item=N82E168...
Hard disk: 1T Western Digital HDD & 500GB Samsung SSD