i recently upgraded from a 970 to a 5700 xt and gigabyte 750w psu and have experienced crashes in games such as hunt showdown and warzone 2. After the crash i can restart my pc but if i shut it down the gpu light goes off and the psu clicks and wont turn on unless i unplug, wait and plug it back in. Sleep mode or normal restart work fine and if i remove the gpu shutting down and turning back on works as it should