kahuna55555

Sry, should have posted in the Troubleshooting Forum, don't know how to move the topic. Be kind, I'm a Newbie

Hi Community, my first post, don't know if this is the right spot. Can't find a solution to a ARMA 3-specific Monitor Problem. When i set the Resolution to 4k in the Main Menu my Monitor (Acer Predator XB321HKbmiphz, connected with DP 1.2.) starts turning on and off all the time. I get a picture for like a second or so then the monitor says "no signal" and turns off, then on again and the whole thing repeats itself over and over. When i set the Resolution to WQHD in the Main Menu no turning off. When i start playing, same thing happens even at WQHD. Arma 3 is the only game with this problem. Other Games work fine in 4k. PC is pretty new, so i will keep testing, but so far no problems with other games. Any Ideas? My rig: Win10 (64bit) MSI Z270 TOMAHAWK Z270 Intel Core i7-7700K Scythe Mugen 5 PCGH 32GB 2400-16 Corsair Vengeance LPX Asus ROG GTX 1080 Ti Strix OC Gaming