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
Ram Speed Gaming Performance Test DDR4 1333Mhz VS 2666Mhz | GTX 1080 Ti | i7 5960X 4.3GHz - YouTube
16GB DDR4 2666MHz Non-ECC Laptop RAM | Integral Memory
Desktop Ram 4GB DDR4 -2666 (1333MHz) SKhynix HMA851U6CJR6N-VK - Buy Desktop Ram 4GB DDR4 -2666 (1333MHz) SKhynix HMA851U6CJR6N-VK at Best Price in SYBazzar
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