Question Flickering and freezing when gaming & benchmarking ?

[Akabane4]

This flickering appears randomly and suddenly freezes, but it often appears when I'm gaming or benchmarking.
Any solution?

PC Spec:
CPU : i5-2400
MOBO: ASUS H61m-c
RAM: 1x8 V-gen ddr3 1333mhz
GPU: Powercolor RX570 4GB
PSU: Cooler Master v4 500w
SSD: V-Gen SATA III 256 GB
HDD: 2TB Western Digital Black
Monitor : Gigabyte g24f2

 

[rgd1101]

how full is the ssd?
what on the hdd?
cpu/gpu temp and usage?

budget for a new system?