Can't run any game that uses UE4

When i play Fortnite on “High” or “Epic” graphics, it crashes all the time, but if i play on mid it runs.
But that also happens for instant on Darwin Project. Every other game that doesn’t run UE4 runs perfectly.

My specs: Amd Ryzen 5 1600x
Gtx 1060 6gb
8gb 3000mhz

Can somebody help me please?