Have you tried any other xintensity values for MPH that worked best for your setup?
yes. --xintensity 4096 move the rig up to 115 (+5) mhash and poolside 113 ish.
on 1.30 and nvidia 497.09 windows 10
let's try --xintensity [5120] --tweak [7] --kernel [6] on 2miners running at P0 = ON and the latest final MSI AB (i find memclock improve from +1200 (MSI beta version) to +1500 (MSI final version)).
https://ibb.co/DkzmZ9R