MotherBoard GIGABYTE GA-Z370-HD3 - 5 beeps

[andrei.mail]

RAM: Corsair Vengeance LPX Black 8GB DDR4 2666MHz CL16
MB: GIGABYTE GA-Z370-HD3
CPU: Intel Coffee Lake, Core i3 8100 3.60GHz box


After I start the system, the system boots and after makes 5 beeps.
Gigabyte would say it's "CPU error," but on many forums, everyone would indicate memory.
I put the memory it on other slots, but I do the same thing.

Without the installed memory, the system doesnt boots anymore.

Any suggestions?

 

[andrei.mail]

I haven't mention: I didnt have a monitor to see what happens. So the beeps were towards the lack of the mouse/keyboard.
Problem solved.