@ DigitalDJ:
Today I have done the following:
- I inserted the "SataDriver" module v12.5.0.1815 (with enabled TRIM in RAID0 function for Z68 systems and corrected checksum) as compressed file into the actual BIOS of my old P8Z68-V.
- Then I flashed this modded BIOS into the BIOS chip of my formerly used system (MB: ASUS P8Z68-V, RAID0: 2x128 GB Crucial M4, OS: Win8 x64).
By the way: The RAID had been freshly created recently with my Z77 system in UEFI mode using the SataDriver v12.5.0.1815. The OS had been installed there as well.
- At least I have done some BIOS settings ("SATA mode": "RAID", "Option ROM Messages" > "Keep Current" and the needed "Boot Options Priorities")
Everything worked fine. Surprisingly I was even able to boot into Win8 x64 without getting the usual RAID boot delay (no Ctrl+I screen).
But: I was not able to see and to enter the "Intel(R) Rapid Storage" section of the BIOS.
My conclusion: The insertion of a SataDriver module into an UEFI mode capable BIOS without such module is possible, but doesn't make much sense, if the support by other BIOS components is missing.
@ RYU_KEN:
The TRIM activity within the RAID array depends not only on the in-use LEGACY/UEFI RAID module and the RAID driver, but on the SSD sort and firmware as well.
This may explain the different results of the TRIM tests and the delay of the TRIM detection.