Even without VRR there are noticeable improvements on the LCD deck from running at 60hz even when frame rates dip heavily, just because the frame timing is shorter so the new frames can be showed sooner.
There’s also the benefit that there’s no gaps in the range for frame multiplication, as long as the display still goes down to at least 45hz. With the original screen you can’t run at 35fps properly (at least OOTB), since it’s lower than the min of 40hz but doubling it exceeds the max (60hz).
True, half of 90 is 45 while half of 60 is 30. The LCD Deck benefits from the 70Hz display overclock tweak noticeably so going up to 90 is huge. I hope the OLED can at least operate at any fixed refresh between 30 and 90.
Definitely looks to be that way. In this video at the linked timestamp you can see the refresh rate being scaled automatically as the FPS cap is scaled. Looks like the Deck is automatically setting the refresh rate to a multiple of the framerate cap so that frame times and refresh times are kept in sync. E.g. with a 30 FPS cap it sets refresh to 90hz (triple), with a 40fps cap it sets refresh rate to 80hz (double), etc.
