Alienware alpha wont recognize ram

Jul 13, 2018
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I recently upgraded my alienware alpha r1 by adding an extra 4gb of ram
(ram purchased: https://www.amazon.com/gp/product/B01CBIC3OE/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1)

i put it into the alpha no problems. However cpu-z nor the about section on windows recognizes it. Showing it only having 4gb instead of the supposed 8gb.
Will the 8gb still work as normal or is there something im going to need to fix, and if so how?

thank you for any help!
 
Solution
pull the new ram stick. run over to crucial and run there free memory advisor. see if ram matches the one you have and see what the max ram and set up should be.