A few weeks back I installed an Evga 1030 and an Evga 1060 SC 6gb card into this
old Dell T3500 workstation I have converted into a gaming box of sorts.
(It has 2 75w 16x PCI-e slots, 525w psu with 1 extra 6 pin connector.  No SLI support, and those cards fit in the case well...)
 
Was screwing around running various benchmarks and poking at the NV 3D settings a bit, and noticed a new option in there
I hadn't seen before.     OpenGL Rendering GPU.
(391.01 drivers.  Same as I used for the 550Ti card I had in here before the EVGA cards.)
 
When running the Unigine SuperPosition benchmark that came on the EVGA driver disk in opengl, 1080p med settings
with the 1030 display as primary and 1060 as the OpenGL Rendering GPU, I get more than 2x the score and FPS
as I do with the 1030 doing it all like a single card.   It also shows both cards in the SuperPosition OSD display.
 
1060 alone of course beats that score by quite a bit, and for some reason ignores this OpenGL Rendering GPU setting
if I try to set it to the 1030.
Although the games I run that use OpenGL WILL use the settings I put in the NV Control Panel.
 
GPU use is balanced better and temps stay lower if I do that, but the games stutter a bit, which is no doubt due
to either the difference in bus speeds or monitor refresh rates etc.
 
My questions are these:
 
1.   Why can't I seem to find any info anywhere about this NV OpenGL Rendering GPU option?
 
2.   If I got a 2nd 1060 6gb card, would this actually be useful for running OpenGL games and applications?
 
 

Hmmm...
 
Well thanks for posting a pic of the NV control panel that I saw when I noticed this option.
 
So this option has no useful purpose at all?
Are the guys at NVidia getting paid by the hour to write these drivers?
Just stuck that in to kill some time I guess...

or running secondlife on the second gpu lol

6502kid
Is that normal for these cards, or did I get lucky?

Normal.