R710 Memory Upgrade

I'm going to be upgrading memory on one of my servers. I need to update the bios (may be high enough but since I'm doing it all figured I may do that too since it's been nearly a decade).

Anyways, currently it has 8 4gb simms for 32gb of ram in the advanced mode.

I'm going to get 12 16gb simms.  Is it better to:

A.  Leave in advanced mode and simply swap out for the new simms so  192gb total, 96 gb per cpu

B.  Put in optimized mode and then I've got 4 8gb simms (not in use currently), that I put in?  So then total of 224gb or ram?  Obviously 224 is more but unsure optimized vs advanced and if it's worth the work (running windows and sql server and has been running with 32gb).  Seems maybe a7/a8 and b7/b8 would be the 8 gb simms?

Or something else?