What happens if? ram 4266mhz

[culzone]

What happens if I buy a 4266mhz ram kit and the motherboard supports only 4000mhz?
Will it go down to 4000mhz then? or are there different XMP profiles?
G.Skill 16GB DDR4 4266MHz CL19 Trident Z Red

 

[derekullo]

The 4266 XMP profile most likely won't work and you would need to manually dial in a stable working profile if a frequency 4000 or below isn't available.

XMP is off by default so you should have a stable system at the start.

There is no harm in trying the 4266 XMP ... worst case you clear the bios and try something different.