I dont want your message to go unanswered because I was once as excited as you are about this (I no longer am, im in limbo trying to find a GPU heatsink for my P775dm3 that fits an rtx 30 for the past 3 months, but since the world is ending and copper is at an all time high, our chinese friends stopped producing them).
I have no idea about P750s, im pretty sure it should be similar to a P775, so you can find/probably already found links to DSANKE BIOS here on the forum if u just look for it a bit more.
As for the EDP OTHER thingy, I think most people just ignore it, in the undervolting community more often than not I've seen people complain about it and the conclusion was that it's just bullshit, but I might be wrong. I once managed to find DSANKEs posts on a chinese forum but I've long lost the link to that (you also need a baidu cloud account and some shit for that as well, but as I said, I can't find the link anymore, is somewhere on this forum).