so i have a hdmi cord that i just found laying around the house from who knows what cheap brand its just black with gold tips and i have a 4k@60hz or 1080p@100hz 50 inch onn tv(model number ONC50UB18CO5) with 4 hdmi ports and 1 usb port and the hdmi 1 is a hdmi arc port whatever that means, i have no idea. but it has no display ports.i was wondering how i would be able to tell what hdmi cord i have like like 2.0 or 2.1 or 1.3 etc because im running at 1080p@100hz and i dont know if im actually getting the 100 hertz because i dont know what hdmi cord i have