How to fix blinking and flickering with strange colors (even though the srivers were installed) in a new xfx rx 550 2gb?

[erifino10]

Im just gonna ask because i just bought a new gpu. My screen is making weird stuff. My pc is an old office pc specs:
Intel xeon L5410
6gb ddr3
450watt psu
Gtx 550 ti(my old gpu)

 

[erifino10]

*drivers