I was reading my motherboard manual for 16GB memory and it says compatible with CMZ16GX3M4X1866C9R which is just the red version of CMZ16GX3M4X1866C9 hence the "R" at the end. It does not list the later non "R" version in the manual, but am I okay to assume it doesn't make a difference in compatibility? Can I get the black version since it is cheaper and it will still work just fine?