I have similar issue at high memory speed. I think the motherboard is the limiting factor.
The newer BIOS might help a little with memory clock I didn't test yet. The mod BIOS is not needed unless you want to access the hidden option like BGS and memory hashing options. There is also options for ECC Memory which is cool but probably not needed
Setting Max CPU Boost Clock Override to 200% possibly is increasing single core boost speeds on the 2700x but still testing those options.
Last edited by sideeffect; 07-02-2019 at 09:05 AM.