SLI settings in Windows 10 - Resolve newbie

I am very new to Resolve and so am looking for assistance, please. I have two nVidia 960 GTX cards each with 4GB RAM in an SLI arrangement. I am seeing a yellow '!' in Preferences/System telling me "Davinci Resolve playback performance may be impacted as the OpenGL context for viewers was initialised on the incorrect GPU.
Please update the OpenGL Rendering GPU to your GUI card in nVidia control panel under Manage 3D Settings/Program Settings/Blackmagic Design-DaVinci Resolve/OpenGL Rendering GPU".
I have probably fiddled with more than I should but have tried every combination available to me but still get the yellow "!".
Any suggestions as how to get around this issue will be gratefully received.

[Peter Chamberlain]

First, please remove all aspects of SLI as Resolve uses the GPUs much better.
Try that and you still have problems please review
viewtopic.php?f=21&t=69837

OpenGL Rendering GPU"

You use CUDA why bother about OpenGL render? I have SLI of 2 1080TI, both work synchronously reaching 90% of load for each one.

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