Question lenovo y50-70 vertical lines pink and greeen after overclocking laptopemoniter refrash

[eirfan khan]

my laptope screen is 4k and standerd refrash rate is 64 htz but when i overclock 48 htz to 60 then pink verticle lines appared plx gauid me how to change my refrash rate 48 t0 60 without any problem...and one thing my laptope disply are locked in to 48 htz .....and i using for overcloacking custom resalution utillity....thanksss

 

[rgd1101]

48 mhz for 4k. or you can lower the resolution to get higher refresh rate.

 

[eirfan khan]

48 mhz for 4k. or you can lower the resolution to get higher refresh rate.

Sir i also tried lowst resolution and 1080p with 60 htz i face this same issue ......

 

[eirfan khan]

Sir i also tried lowst resolution and 1080p with 60 htz i face this same issue ......

I have lenovo y50-70 i7 gtx 860m 4gb+intel hd 4600m