I installed 1006 which didn't fix the freesync flicker, Tried CRU as well with no luck. Not sure I wanna send this back and get a third replacement only for it to do it again. Very very tempted to send for a refund but honestly nothing comes close to this display annoyingly
Are you running the Nvidia 451.85 Hotfix Drivers? I've got my 27" FB01 G7 running perfectly now as far as I can tell, firmware 1006.0 and Nvidia Hotfix Driver 451.85 (has to be downloaded manually, will not be picked up automatically by Geforce Experience). I've not had to use CRU or do anything else out of the ordinary to stop the flickering I was seeing in the menu screens on F1 2020.
The only perhaps difference on my system is I have set the Monitor Refresh Rate to 144Hz in the Nvidia Display -> Change Resolution section, because I know with a GTx1080 it's not going to be capable of those super high FPS rates. I will repeat my tests later with that set to 240Hz, but I don't expect any change. I've got no FPS caps set in game, no Maximum Framerate set in the Nvidia Manage 3D Settings, and I have Adaptive Sync turned on on the monitor and G-Sync enabled in Nvidia Control Panel.