My R5 2400G is presently installed on a MSI X570-A PRO motherboard and I have 24GB of DDR4-2400.
battling cashing and system freezing, i have found out the cause of my problem
even though its disabled, the Vega 11 graphics are enabled according to the device manager. that is a horrible bug that somehow did not get caught.
So I removed the RX 480 and went back to my GTX 1060 and at least the cashing has stopped.
The RX 480 is GCN 4 while Vega is GCN 5. I am not sure if the AMD drivers are able to handle this scenario properly.
Would be nice if the BIOS would do what its supposed to.