Why won't my computer turn on with new RAM?

Question

Iron

Today I bought a new RAM RAM 8Gb DDR3-1866MHz (Kingston, HyperX) Fury Red 2 sticks to replace the old Samsung 1333mhz with 2 sticks of 2 GB each. Motherboard P7H55-M lx. When I set one bar, the computer turns on, reaches a certain stage in the BIOS post test and starts rebooting. When I put 2, it hangs in the post test. Why can this be?
CPU intel core i3 3.3ghz

Answer 1

https://www.asus.com/ru/Motherboards/P7H55M_LX/spe...
Your motherboard specifications indicate the optimal clock frequency and maximum volume. And you bought 1866MHz and you are trying to insert two by 8.