Only Dell BIOS A00 loads the PCIE SSD from Plextor. The model I have is Plextor M6e 512GB. Any other BIOS A01-A04 flash results in no boot/no bios setup.
Only way to get it boot again is to boot using the original samsung sata3 SSD and downgrade the BIOS to A00.
Please fix as I'd like to have the latest BIOS.