I previously thought that the problem could be related to the rx 5700 drivers, but after a driver appeared that solves this problem, crashes in timespy extrime cpu test remained.
Ryzen 5 2600
Asus prime b350m-a with 5220 bios
Ballistix sports lt 3000mhz 16gb (8gbx2 kit)
Sapphire rx 5700 reference design (currently 20.2.2 driver, but the problem has existed for a long time)
PSU be quiet system power 9 700w
Сrash happens both with overclocked and stock CPU, I also tried to run RAM without an xmp profile @ 2400mhz, but it did not help. Somehow custom windowed run of this test passes without crash.