System wont boot after installing new ram

GForceGTX

Commendable
Aug 7, 2016
3
0
1,510
I have 3 ram sticks:
2x Gskill Ripjaws V 4GB 2133 DDR4
1x Gskill AEGIS 8GB 2133 DDR4
My mainboard has 4 ram slots.
When I installed new 8GB ram my system will turn on and start, But it will not boot and no sound.
I removed my new ram. It was good. Then I Removed all rams and installed new 8GB Ram. It works too. It can work with 1x4GB and 1x8GB. But nothing when installing third ram!
What's the problem?
System:
Asus B150 Pro
Core i5 6500
HD Graphics
HDD & SSD & 550PSU