Although Amazon lists this as 120Hz, I am fairly sure when running at 4k, this monitor can only do 30hz...The 120Hz
"till, there are a couple of key caveats here. DO NOT buy this TV for gaming. While Amazon lists its hz rate at 120, this is not true for 4K. This display can only output 4K at 30hz which is not zippy enough for most games, but it should be fine for movies. "