I haven’t battery right now (using power supply). All possible profiles are set to “maximum performance”.
I’m unable to check this right now, but there is only small improvement when changed scalability settings to Low. It looks like there is a big problem even with simple scenes for NVIDIA GT(X) 750 family. Resolution reduction (for example to 1280x720 helps a lot. On my test scene I had 11 fps on 1080p, but on 720p had 20 fps with SLI enforced using AFR2 frame rendering method. It looks like shader related problem.
I’ve checked with profiler and found that most consuming is Occlusion Cull and Render Query Result (but that’s probably caused by long previous frame rendering time).