HELP FOR SUPPORT MAXIMUM RAM LIMIT

HELLO! I HAVE A PROBLEM TO UPGRADE MY COMPUTER RAM

MY MOTHERBOARD IS INTEL DH61WW

PROCESSOR- I3-2100, 3.1GHZ

CURRENT RAM IS 4GB X 2 = 8GB, @1333MHZ

I AM THINKING TO UPGRADE MY RAM FROM 8GB TO 16GB (8GB X 2= 16GB)

I SEARCH MY MOBO SPECS ON INTEL ARK WEBSITE IT SAYS MAXIMUM MEMORY 16GB SUPPORTED BUT I CHECKED ON SOME OF THE

SITES THAT SAYS IT SUPPORTS ONLY 8GB MEMORY

PLEASE HELP ME

IF MY MOBO SUPPORTS 16GB MEMORY THE SUGGEST ME THE BEST MEMORY

AND ALSO TELL ME THAT DOES DH61WW SUPPORTS PCI-E 3.0 ?