[bsoriano]

One frame repeat after a few minutes is normal.  This is why many use a custom timing mode either via madVR (best) or NCP (easy).  Last I tried, it limited everything to 8bit so I stopped using custom timings since I really never notice the frame repeat unless I'm looking for it.  If it was more often, it would drive me up the wall.  Thankfully it isn't.  Lowering settings isn't going to eliminate it.  It's because every display 'times' the sync differently.  (Roughly) the spec for the refresh rate on a display is 24Hz.  The FPS (frame rate) for most titles is 23.976.  There is a very small difference there.  24 vs 23.976.  That difference catches up every few minutes.  Nothing to do with your GPU or your rips. 

I have no issue selecting 12bit using driver 390.65 and have tested that it continues switching from 8bit Desktop to 10/12bit Video automatically as usual.  If the way I showed you how to achieve this isn't working for you, there are lots of other ways.  If you are presently at RGB FULL 8bit 60Hz, select 30Hz.  Now select 12bit.  Finally, go back to 60Hz.  It will change back to 8bit as it should for Desktop mode but when a Video mode is started, it will automatically change to 10/12 bit as it should.

You should NEVER turn HDR and advanced color switch on.  We don't want Windows to tell your display to switch or add HDR.  We want madVR to tell the display to use its HDR mode.  Fwiw, I can still manually turn it on.  No idea why you can't but who cares?  IT SHOULD NOT BE ON WHEN YOU ARE WATCHING A VIDEO - EVER.  HDR is something you want your display to do..... NOT Windows.

Thanks brazen1!

Appreciate the info on the frame repeat.  I watched "Wonder Woman" last night, and I could not notice it.  Now I need to finalize the keyboard shortcuts and program my Harmony appropriately to exit MPC-BE.

Also thank you for the alternative method to set 12 bits, that worked perfectly.

And thanks for the reinforcement in terms of the Windows switch, I will leave it always off.

Regards,

Bart