$ nvidia-smi
Thu Mar 30 11:15:19 2017
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 378.13 Driver Version: 378.13 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|====================+=============+======================|
| 0 GeForce GTX 1080 Off | 0000:01:00.0 Off | N/A |
| 35% 60C P2 149W / 180W | 635MiB / 8112MiB | 65% Default |
+-------------------------------+----------------------+----------------------+
| 1 GeForce GTX 1080 Off | 0000:02:00.0 Off | N/A |
| 49% 65C P2 187W / 180W | 635MiB / 8114MiB | 95% Default |
+-------------------------------+----------------------+----------------------+
| 2 GeForce GTX 1080 Off | 0000:05:00.0 Off | N/A |
| 54% 67C P2 184W / 180W | 635MiB / 8114MiB | 95% Default |
+-------------------------------+----------------------+----------------------+
| 3 GeForce GTX 1080 Off | 0000:06:00.0 Off | N/A |
| 43% 63C P2 177W / 180W | 635MiB / 8114MiB | 98% Default |
+-------------------------------+----------------------+----------------------+
| 4 Graphics Device Off | 0000:07:00.0 Off | N/A |
| 48% 81C P2 255W / 250W | 673MiB / 11172MiB | 99% Default |
+-------------------------------+----------------------+----------------------+
| 5 GeForce GTX 1080 Off | 0000:08:00.0 Off | N/A |
| 54% 66C P2 181W / 180W | 635MiB / 8114MiB | 99% Default |
+-------------------------------+----------------------+----------------------+
A couple of questions:
-one card is usually around 65%. This is a headless machine with no monitor. Is that the issue?
-the miner auto selects algorithm 0. I presume that's the best? Seems like there's a fair amount of memory left, but then the GPU is at 99%.
-are some 1080's that can't be OC'd on Linux? I tried to set some of the clocks with nvidia-smi - but they failed as not supported.
(and yes the fourth card is a 1080 Ti - I'm getting about 660 sol/s with stock.
Personally I too prefer linux for mining.
Currently I use nVidia's 375.39 driver - it is rock solid, but it lacks support for 1080 Ti in your case.
You can get more GPU usage by manually setting P0 instead of P2 by setting highest application clocks via nvidia-smi.
I use it on a rig with GeForce GTX 970 that also prefers P2 by default.
I've tried many ways to overclock nVidia card in linux, none of them successful (I use Ubuntu Server, headless, without GUI)