@rylan74 - yes, correct, if you are not using RAID on Intel then no need to update that, it would not be loaded anyway, unless you run non-RAID disks as AHCI (AHCI single disks when RAID Mode enabled but no RAID created)
And, if you do not want to use/update j.Micron/Marvell, then you can update the Intel one no problem.

@Lost_N_BIOS - Ah okay. I currently set my SATA configuration as AHCI in BIOS. If I had to set to RAID mode but not configure RAID what sort of benefit would that be?
So, Basically I could still use the original modified BIOS as described in my first post, to update the Intel Firmware? or if you get a chance, could you please create a new BIOS with only Intel firmware updated?

@rylan74 - Nothing noticeable in real life, but many people use systems like that, sometimes you can squeeze few extra MB/points in benchmarks that way.

Yes, you could use the Non-Marvell BIOS from post one (check about the j.micron issues I linked you to though).
Or yes, if you want, I can make you BIOS with only Intel rom updated. If you want that, please let me know what version you want installed.

@Lost_N_BIOS - Okay, I have been reading about the Intel ROMS on AHCI & RAID ROM Modules
The previous BIOS mods had Intel RST RAID ROM v11.2.0.1527 = best choice for Intel ICH7R/8R/9R/10R Chipset RAID systems (matching RAID driver: Intel RST v11.2.0.1006), best performant ROM for all RAID0 users
According to Recommended ROM version that would be Intel RST(e) RAID ROM v12.9.0.2006 = good choice for Intel 5- and 6-Series Chipset RAID systems (matching RAID driver: Intel RST(e) v12.9.4.1000)
This one - https://www.win-unattended.de/Benutzer/F...od-acc-CPL0.rar
I take it that this version is the latest compatible version with P55 chipset, if so then that version will be preferred.
Thanks.

Your comments contradict themselves Previous mod had = Best choice / then you say recommended rom = different than first comment
I personally don't know what is best, I don't mess with that stuff myself, but I can go read the threads and find what is latest and or best, but those two things do not mean the same thing, which is why I asked you to research and choose (latest does not = best always, it only = latest)

OK, this is what I found, same as you read I assume, but you have to clarify for me what you want
Intel RST RAID ROM v11.2.0.1527 = best choice for Intel ICH7R/8R/9R/10R Chipset RAID systems (matching RAID driver: Intel RST v11.2.0.1006), best performant ROM for all RAID0 users
Intel RST(e) RAID ROM v12.9.0.2006 = good choice for Intel 5- and 6-Series Chipset RAID systems (matching RAID driver: Intel RST(e) v12.9.4.1000) << I am not even sure if you can use this, since it's RST(e), maybe you can with the correct driver/software, but it's mainly for actual RAID users I believe.
Intel RST(e) RAID ROM v13.5.0.2164 << Latest possibly "Compatible", and same thought as mentioned above about RST(e)

@Lost_N_BIOS - Sorry if it sounds contradicting/ confusing...
I thought that Intel RST RAID ROM v11.2.0.1527 = best choice for Intel ICH7R/8R/9R/10R Chipset RAID systems (matching RAID driver: Intel RST v11.2.0.1006), best performant ROM for all RAID0 users.
Since my MB uses P55 chipset, I thought that this would work, Intel RST(e) RAID ROM v12.9.0.2006 = good choice for Intel 5- and 6-Series Chipset RAID systems (matching RAID driver: Intel RST(e) v12.9.4.1000).
If this is only for RAID systems and has no effect on AHCI or RAID(AHCI mode), then I guess it will be not beneficial to me.
BTW I tried to boot up my system in RAID AHCI mode, but it did not boot into Windows, Blue screen Boot Device Error.


Also saw this on the same thread:
Intel AHCI ROM modules
Remarks:

According to my knowledge only Award/Phoenix BIOSes (and maybe some non-UEFI AMI BIOSes) of older mainboards do contain a discrete Intel AHCI ROM module, whereas the AMI UEFI BIOSes of the newer mainboards (with an Intel Chipset from 6-Series up) just contain an Intel RAID ROM, but no Intel AHCI ROM module.
The function and the compatibility of the "Intel(R) SATA AHCI Controller" obviously is managed by a "normal" (non-OROM) BIOS module, which cannot resp. don't need to be updated.

Intel AHCI ROMs (only for BIOSes of older mainboards with a non-UEFI BIOS):

Latest officially released Intel AHCI ROM module:
>Intel AHCI ROM v1.20E< (>MIRROR<)
Note: This module has been compiled by Intel in 2008 and is the latest AHCI ROM module, which has been officially released by Intel. This special module obviously has been primarily designed for Intel 5-Series/3400 SATA AHCI Controllers (DEV_3B22), but obviously works with other Intel AHCI Controllers as well.

Latest available Intel AHCI ROM module:
>Intel AHCI ROM v2.00h (new, but its benefit has not yet been proved) (>MIRROR<)
Note: It was our Forum Guru plutomaniac, who found this AHCI ROM module dated 05/04/2015 and gave us the link (big thanks to him). This source module doesn't contain the DeviceID of a certain Intel SATA AHCI Controller. That is why I am unsure, whether it will work as it is with all Intel AHCI Controllers up to the 5-Series Chipset ones or the matching specific DeviceID has to be added into the hex code.
Update: Our Forum member YUQINGLIU inserted this module into BIOS of his Intel 5-Series Chipset mainboard and it seems to work (look >here<).