Are you using that modified BIOS that's floating around or did you tweak it yourself?
Are you using a 1->3 "splitter" or a M.2 slot adapter?
I am using the latest MSI BIOS. It was my understanding from my research that the "hacked BIOS" was created before MSI introduced the latest BIOS and was thereafter obsolete. I didn't make any other changes to the BIOS other than selecting the settings noted in both of our posts.
I am using the 1 to 3 PCIe splitter. It comes in a blue box, and it looks like all of the Amazon and eBay vendors are selling the same product.