I find my board/setup only needed more IMC voltage to run a bit more BCLK @ 100 .92~.93 is its sweet spot. At the above settings any more than .94 made SPI fail the more you put on the quicker it failed. I also find too much IMC voltage brings on a vdimm wall.... too much IMC voltage means the more vdimm I add don't help & fails SPI quicker & quicker if you get my drift.

I did briefly test dram termination voltage but I have to admit not properly I just moved up & down a little but didn't find a benefit so I left it alone. Do you find it helps & if so what sort of percentage against vdimm do you find works for you?