Aorus 740 sol/s
Zotac 730 sol/s
Sometimes they are getting the same hashrate, most of the time the aorus is +10 sol/s more than the zotac.

I've tried 384.111, 387.34 and 390.30
390.30 gets the best hashrate so far.

Not sure which cuda version the miner is really using. I tried to remove 7.5 and install 9.1
When I run the following commands I get different versions.

$ cat /usr/local/cuda/version.txt
CUDA Version 9.1.85

$ nvcc --version
nvcc: NVIDIA (R) Cuda compiler driver
Copyright (c) 2005-2015 NVIDIA Corporation
Built on Tue_Aug_11_14:27:32_CDT_2015
Cuda compilation tools, release 7.5, V7.5.17