Question 2 kits of 2666 mhz ram can only get to 2133

Oct 16, 2020
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I recently got a kit of 3200 mhz 2/8 gb ram to add on to my 2/8 gb 2666 ram hoping to be able to run them together at 32 gb 2666 mhz but whenever I run them together they can only get to 2133 but separately they can both get to 2666
 

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