horizontal lines flickering on hitman

[rosshall93]

Finally got around to getting a graphics card. Installed hitman from steam and for some reason theres horizontal lines flickering across the game.

no idea if its systems related but my system is

i5 6600
rx580
asus h110 ddr4
kingstorn fury 16gb
using an old monitor with vga to hdmi adapter to gpu

everything is on highest settings.

if anyone got any advice please let me know.