Question about moonlight streaming

I have been using moonlight/sunshine with my PC to stream more demanding titles with the settings cranked up to my deck (OLED). I I've been trying to stream at 90hz since apparently the display can handle it (I have decent net) but I've noticed the frametimes is more erratic than if I was doing it @60hz. Is this caused by a setting or should I try to match my PCs refresh rate with that of the deck? Gsync is turned on too for my setup so no idea if that's the culprit. Thank you in advance