Edit: "dejo" make a good point... I wonder how good MSI's BIOS support will be? That seems to be a strength for Asus ROG's boards.
Nice review; looks like you had fun from start to finish. I'm trying to imagine what this thing will do when, as ZZ Top says " you got me under pressure". Fully loaded, 4 gpu's, full RAM load, dewar, and a six pack.
The XPower II offers quad channel memory with 8 DIMM slots which can accommodate up to 128 GB od(sic) RAM (32 GB per slot). RAM overclocking is rated to be 2400 MHz, but MSI has reported to have achieved 2500 MHz, this obviously depends on the quality and rating of your RAM kit. Inserting the RAM sticks into the slots is made easy by Eazy DIMM design, essentially you only have one set of clips, this feature has been around for a while.
Other than the ridiculous HS design (what are we 10 here?) the board looks great. GJ Brolloks