Hello again. I have tried overclocking manually but it didn't take long actually to the system stop booting.
I have tried 5200 + 1.25V and it booted.
Then I have tried 5400 + 1.25v, 5400 + 1.30v, 5400 + 1.35v but non of those voltages worked. When 5400mhz is reached system stops booting...