Question ELGATO HD60 S can't make custom res.

[sickino]

Hello, i used to play at 1440x1080 with a stream on 1080p60fps on a single pc stream, now i have dual pc stream and i bought elgato hd60 S and everything works fine, quality is great, audio is great but when i try to make custom res in NVIDIA Control Panel it just wont let me do it and im forced to play on the highest 4:3 stretched that is 1280x1024... Can someone tell me how to fix that please? Because i know its possible i used to watch streamers back in the day with the same capture card and dual pc playing on 1440x1080 or 1600x1080. Thanks! <3

 

[sickino]

GPU - EVGA GeForce GTX 1080 SuperClocked
WINDOWS 10 i think 1903 ver.