I dont know much about computer but am helping a friend out, is the ASRock AB350 Pro4 compatible with ram he bought?
http://www.asrock.com/mb/AMD/AB350%20Pro4/#Memory
https://www.umart.com.au/GeIL-8GB-Single-DDR4-2400Mhz-Pristine-series_35010G.html
http://www.asrock.com/mb/AMD/AB350%20Pro4/#Memory
https://www.umart.com.au/GeIL-8GB-Single-DDR4-2400Mhz-Pristine-series_35010G.html