AOC U2879VF- Overclocking

[Surasonac]

Hi, I have a AOC U2879VF panel. Its 4k at 60hz. Its connected with Display port to my GTX 1080ti. I've got it overclocked to 70hz, however when I push it any higher I start to get artifacts which are lines which appear across the screen intermittently. This becomes evident at 72hz and progressively gets worse. My display accepts refresh rates all the way up to 80hz, maybe even more I haven't tried. Do you think these artifacts are just because the screen can't go any faster or do you think its the cable that might need upgrading? I know low quality cables can often cause display issues. I'd love to hit a stable 75hz.

Thanks

[bingo]

try this : https://testufo.com/frameskipping