Solved! LG OLED65B8 lag and tearing while gaming

[iam4ever]

Hello everyone,
lucky me i have thin nice LG B8 TV. I am trying to use it as monitor, but lag is big. It is like half second. I know my PC can handle games good, when i play on monitor, but if i use TV things get ugly. So lets get to the point: I use HDMI cable - 15m to connect PC with TV. I guess cable is v1.4, because i do not remember paying more than 15 euro for it. I change TV picture mode to - GAMING, witch reduces lag significantly, but still it is unplayable.
I tried reducing the resolution with no luck. Some old games work perfect - like Rayman legends. I was pleasantly surprised that Assassins Creed Odyssey on 1440p work nice too, but if i enable HDR, things get ugly again.
So everything is pointing me to change my HDMI cable to 2.0, but that will create a lot of work for me, because cable is IN the wall and ... you get the picture
Anyone who have knowledge about impact that HDMI 1.4 ... or less can do to my configuration please share your wisdom with me

 

[hang-the-9]

It's not really a cable issue, it's the TV, TVs are not meant to be used for gaming and many have a high amount of input lag. If you want to rule out the cable, just move the computer closer to the TV and connect them with a newer HDMI cable, but I doubt that will make a difference. 15 meters is pretty long for an HDMI cables but I have used that length at work many times, just not for anything were delays meant anything.