Why don't you want to use XMP? The 'problem' is that you have 4 sticks - it doesn't matter what mobo make or memory you have - when you have 4 sticks, it doesn't 'behave' with Ryzen systems. It's also not a very common configuration. I have online searched this stuff...I have an idea to have virtual machines so I tried to research this situation. That's all that is going on.... if you tried with 2 sticks, you'd probably be up and running - (meaning specified speeds or very close to it) did you try this yet just to confirm?Ok the build is complete while everything is running smoothly, sure enough the RAM is running at only 2133. I must admit, i'd really like to get that running faster but I've heard some horror stories with people using XMP with Ryzen builds, and especially Gigabyte mobos which I have. What would be your suggested way to bump up the speed without using XMP?
I forget the specifics but it's the way Ryzen/AMD and memory work when it's 4 sticks... you have to do more manual tinkering. Eventually, it will work. Corsair and G.Skill are both very good - and you picked a good mobo. Just be patient and google search this - and you will find some answers. I just can't recall what you do, exactly, but you probably have to make some manual settings changes. Nothing complicated. You might check the Gigabyte forums and try a youtube video search for using 4 memory sticks with Ryzen.
P.S. the 2133MHz speed is also common to start from (i.e. OOTB defaults). I forget which mobo make it is but they list in their QVL, that exact (starting) speed along with the other specified speeds that have been tried/tested which worked.