I have 2x4 G.Skill 1866mhz 2 years old AND i want to put 2x4 Micron 1rx8 pc3-12800u-11-11-a1

I have 2x4 G.Skill 1866mhz 2 years old AND I want to put 2x4 Micron 1rx8 pc3-12800u-11-11-a1

I was wondering if this stuff would be compatible? And if so do i have to change the timings or anything like that on them?

I have an MSI Gaming 970 Motherboard with an FX-6300