In theory this ought to work unless dithering is enabled in hardware. We still don't know what is going on with VBIOS dithering/flicker.

Aside from trying to monitor symptoms, is there any way to verify or validate that the changes took effect?

    MagnuM That's what I'm working on.

    Watch this space.

      Sometime next week I will try enabling dithering on my gtx 660 and see if I can make it uncomfortable. Its a strange first step, but I figure making a good card bad is easier as I can be certain a change has occurred if it starts causing me problems.

      • diop replied to this.
      • KM likes this.

        Seagull I agree and also if anybody has a strain-free setup, upgrade to the latest OS and latest drivers - if there is more discomfort, even minimal - then yet again it's looking like this is a software issue.

          MagnuM I can see the lack of shimmering & feel the difference (immediate return of symptoms when i switch back to temporal d), but i dont get the expected color banding here[ http://i.playground.ru/i/26/98/02/00/blog/content/uhd4ha4c.jpg - should look like this https://i.imgur.com/o1zpgHn.jpg ], which i think means my BenqEW24 is now doing the dithering.
          [Dont forget to run the 'Restart' program]

              reaganry

              Did this actually fix any problems you had using that card for you? That is did your set up go from strain to no strain?

              • KM likes this.

                reaganry Sounds promising. What version of Windows are you running and are you on the latest Nvidia Driver?

                Also would be interested to know if you get strain during BIOS-Startup or just in Windows?

                    diop win10 pro (1809) nvidia 750ti 417.35
                    strain=>nostrain and back again if i turn td back on.

                        reaganry And in the BIOS or while looking at standard VGA stuff (like booting from a Windows setup disk)?

                            reaganry Are you using this machine for long periods? Hopefully it's not placebo or anything like that.

                            I've got a GT710 in a W10 machine - I'll try the fix when I can to see if there's any difference even with a bad card - unfortunately to apply the fix will take at least 5-10 minutes and a few reboots (in which time my eyes get fried) so will have to give it time to thoroughly test out.

                              I'm using the same driver (417.35) on a fresh W10 install to test.

                              I initially had trouble importing the registry but just had to allow admin access to the key.

                              First impressions; There may be a difference, but is more of a 50% improvement than 100%.

                              I haven't used W10 for months but compared to my good W7 machine the colours are awful in W10 - over-saturated and the whites look harsh and blue-tinted compared to the 'creamy' W7 colour temperature.

                              KM actually i think the bios does feel better too.. even though this fix shouldnt actually affect it ?

                              • JTL replied to this.

                                  reaganry If it changes the card hardware settings (doubtful but it's not IMPOSSIBLE) it could.

                                    Does the change have to be applied after each reboot?

                                    • JTL replied to this.

                                      Anyone with a bad GTX 9xx/10xx and (not) Windows 10 try this and comment?

                                        Sorry, I've sold my various bad nvidia cards (980ti, 1070, 1080) so cannot test this. I'd like to, but all this buying and on-selling bad cards is expensive and frustrating.

                                        I do have a bad Vega 64 card that I need to sell, where the supposed registry key fixes for dithering had no effect.

                                        Please post up your results. I'd eat my hat to be able to run a modern fast Nvidia card (newer than a 970).

                                        • JTL replied to this.

                                          Seagull Registry keys are persistent. Only moving the GPU between computers or reinstalling Windows and maybe updating/reinstalling the GPU drivers should require the changes to be reapplied.

                                            JTL

                                            I have a bad 950 and I'll test this on Win7 and Win8.1 if someone writes a step by step for how to do this properly as I'm not convinced I've done this correctly.

                                            Edit: Nevermind I've definitely done it correctly.

                                            I will test my bad cards over the weekend and see what's happening.

                                            I also have a theory that one of my newer motherboards (2017) is forcing dithering via the BIOS persisting into the OS somehow. I will test it on this as well.

                                            • JTL replied to this.
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