Fernando,
So, at the moment i have set the "Option ROM messages" to "Keep Current" and test result is the same : Disable CSM does not work.
So, i have to suspect a piece of connected devices not fully UEFI compatible:
If Marvell component is disabled the problem remains: so not a Marvell issue.
If i use only IGPU same pb: so not a eVGA graphic card issue.

So, i have to suspect any other components manufacturer ?
What do you call exactly 'connected devices' ?
USB components ? Optical CD/DVD devices ?
or any others ?

By the way i had tried to do a fresh install W 8.1 Enterprise in UEFI mode:

I don't remember if with "CSM disabled" W8.1 was booting, i had backed up the full system RAID 0 SSD partition and so i can restore it and do a test and let you know.
If i send you the exhaustive list of components (HWINFO64 report or any other report you want) is it possible for you to have a look and give me what are the 'suspect' components ?

He Fernando: with W 8.1 and CSM disabled the system boot fine !!
So, What do you think about ?

Zitat von Fernando im Beitrag #80

---

Zitat von 100PIER im Beitrag #79

---

He Fernando: with W 8.1 and CSM disabled the system boot fine !!
So, What do you think about ?

---

Your experience verifies, that Win7 does not give full UEFI mode support.
If I were you, I would switch to Win8.1. The UEFI mode OS installation is a must-do in the near future, because the LEGACY mode (OROMs) will not be supported anymore.

---