07 Feb 4K? 60Hz? How to (hopefully) get your TV working correctly

I've always had computer monitors, but I never owned a TV before in my life. Recently, I became the owner of a 43" 4K TV. Since I don't usually watch cable television, I connected it to my computer as an extended display, primarily using it for gaming. I couldn't get the TV's native 4K resolution to render in 60Hz though. After looking through the display adapter's settings, I concluded that my HDMI cable didn't have enough bandwidth to support 4K60. In effect, I was probably using a [HDMI 1.4](https://www.hdmi.org/spec/hdmi1_4b) cable. I later found there is [no way to determine](https://forums.tomshardware.com/threads/is-there-anyway-to-detect-what-version-of-hdmi-cable-my-cable-is.3167678/post-19601026) what kind of cable is being used, since there's nothing in the spec that requires a version number to be printed. So I continued using the TV at 1080p 60Hz since I figured that was easier on my GPU anyway. After a while though, I decided to dig deeper since running 1080p on a 4K TV...feels kind of weird. I found a nice [tool](https://glenwing.github.io/adapters/?output=HDMI&input=DP) that helped me find out that I'd probably need an active DisplayPort to HDMI adapter to get 4K60 support. After purchasing one and connecting it from my computer, I found that the refresh rate was still stuck at 30Hz. I looked through the TV settings to see if there was any option to change the HDMI version from 1.4 to 2.0. There was nothing. I checked if the HDMI port supported 4K60. All ports supported 4K60. I saw an option for [EDID](https://en.wikipedia.org/wiki/Extended_Display_Identification_Data) buried deep in the TV settings. There were two options: 1.4 and 2.0. I didn't know what EDID was, but the numbers seemed to make sense. So I changed it to 2.0, and suddenly 60Hz was unlocked.