I have noticed that my RAM is currently running at 1333Mhz when it should be running at 2666Mhz. After some research I've concluded that I need to select the right XMP profile
Hynix 8GB PC4-21300 DDR4-2666MHz 260-Pin SODIMM 1.2V Single Rank Memory Module HMA81GS6CJR8N-VK at Amazon.com
CORSAIR ValueSelect 16GB (2PK x 8GB) 1333MHz DDR3 C9 So-DIMM Laptop Memory Multi CMSO16GX3M2A1333C9 - Best Buy
V-Color 32GB (2 x 16GB) ECC SO-DIMM DDR4 2666MHz (PC4-21300) for NAS Micro Server/Workstation/Compatible with Synology 21 Series 2Rx8 CL19 1.2V (TES416G26D819K-VKC) at Amazon.com