Reddit reviews Jackky 620 Retro Classic Video Game Console AV Output Mini NES Console 620 in 1 Built-in Plug and Play Video Games with 2 Controllers Handheld Games for Kids & Adults

I also checked this and tested two Cables. I have this one now https://www.amazon.de/gp/product/B07JG2LGB9/ref=ppx_yo_dt_b_asin_title_o04_s00?ie=UTF8&psc=1

I could check back with the original one that was in the package, and try Hdmi.

I have trouble with the Displayport Gender Changer (female to female adapter). I tried a 8k DP 1.4 Cable (length) 5 meters and 3 meters and it didn't work. I guess the adapter is to blame. But there are only 2 diffrent available on Amazon and both don't say what version of DP they can handle.

I just bought a 3m male to female cable wich is sadly only DP 1.2 it works (on 144hz) but has some light snowy fragments and occasional short blackouts.

The best cable I tested so far is a DP 1.4 male to female from Club 3D. Sadly it's only available in 2 meter length. It works on 144hz with zero downsides so far.

BTW: I use a Geforce 1080 Ti. When I extended the cables of my Oculus rift I noticed that the output of my old GTX970 was not powerful enough and problems I had got solved magically when I upgraded my GPU.

Gender Changer Adapter (is a low DP version I guess):
https://www.amazon.de/dp/B003EKF2II/ref=cm_sw_r_tw_dp_U_x_2HgtDbFX9CVW9

8k 1.4 3m Displayport Cable Male to Male (doesn't work due to adapter I guess):
https://www.amazon.de/dp/B07JG2LGB9/ref=cm_sw_r_tw_dp_U_x_PHgtDbTK6RV10

DP 1.2 male to female cable 3 m (works but not good):
https://www.amazon.de/gp/product/B00GUSALS2/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

DP 1.4 male to female cable 2 m (works without problems, but sadly only 2m):
https://www.amazon.de/dp/B07RJ13CH9/ref=cm_sw_r_tw_dp_U_x_RHgtDb8AEP14J