Ok @Fernando I've just tried with UBU tool.

I do all according to this guide
[Tool Guide+News] "UEFI BIOS Updater" (UBU)
(So, screenshots in this guide don't appear, only thumbnail) and I tried to follow especially this part:

Zitat

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Special TRIM-mod option for Intel 6-Series RAID0 systems:
As you can see, the UBU tool offers an additional option "T", which is for 6-Series chipset users, who want to get an "Universal TRIM modded" Intel RAID module version.
If you hit "T" or "t" instead of any number, you will get a picture like this:

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only a little issue, UBU don't allow me to put your modded Intel RAID ROM v13.2.2.2224 'cause UBU only list me "standard" rom (that I assume are NOT a trim modded, or not?). I tried to enter "T" and don't appear anything. "U" anything as well.
I put attached module in E:\UBU\Modules\IRST\User (it's right position?)

So, now I've got a new bios but I don't know if is TRIM modded or ony updated from my 13.0.0.2075 to listed 13.2.2.2224/13.2.0.2134 (but is TRIM modified?)

PS: I used MMTOOL 5.0.0.7

@Fernando,

Hi,

I am confused about wether trim command is passed through the onboard raid controller on a Z170 motherboard with version 15.5 raid efi driver to a m.2 raid array of two SM961 drives in Win 10?

Thanks