DDR4 2133 mhz ram running at 1066 mhz

Jul 21, 2014
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Yesterday I got an i3 6100 and a new motherboard and some kingston hyperx ddr4 ram, everything seems to work great except for programs like cpu-z and speccy showing my ram running at 1066 mhz when its supposed to run at 2133, can anyone tell me why this is happening and how I can get it to run at full speed?