motherboard DDR4 2133 but the processor XEON E5-2620 v3 can't handle speed ??

hi

i'm going to buy the SuperWorkstation 7038A-I

http://www.supermicro.com/products/system/tower/7038/SYS-7038A-i.cfm

and the XEON E5-2620 v3 processor

http://ark.intel.com/products/83356/Intel-Xeon-Processor-E5-2620-v3-20M-Cache-2_40-GHz

the motherboard says support DDR4 2133  but the processor says memory support DDR4 1600/1866

so if i buy a memory DDR4 at 2133 theres going to work or os going to be a problem??

can u help me please