Well, I had taken a look at the subforum, however there is nothing there that met my expectations, since I was looking for the same thing that is located here, just compatible with 5-series AMI UEFIs.
And this is due to complete ignorance, but how do you know that this procedure requires at least a series-6 AMI UEFI?

I may be misunderstanding you, however the DH55HC is a UEFI system.

I have booted both x64 and x86 UEFI images in the past (Linux live images, I generally use MBR for the ease of using the same OS with completely different hardware), and the BIOS has UEFI settings in it (including disabling legacy boot), so the DH55HC definitely supports UEFI properly.
As to the modules, I am not really sure which modules are those, so I have extracted all files/folders that contain DXE (case-insensitive) in their filenames from the .BIO file that corresponds to my current version (the latest).

Zitat von Fernando im Beitrag #2956

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Apart from that you can forget your idea to get full NVMe support with any Intel mainboard, because you will not get any modded Intel BIOS successfully flashed (due to Intel's specific BIOS protection methods).

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Hello everyone! Here's another X79 success story, parts and software used:
- Rampage IV Extreme mobo
- Asus Hyper M.2 Mini X4 PCIe -> M.2 adapter
- Samsung PM961 256GB M.2 NVMe
- 4901 BIOS (Modded with latest Intel Microcode and NVMe module injected)
- Samsung NVMe W10 driver

The settings that ended up working in BIOS to get the SSD to boot:
- CSM Disabled (if I turn it on the system doesn't boot and I need to remove the PCIe -> M.2 adapter to recover)
- Fastboot ON
- C-states AUTO
- Partial SATA boot initialization (have 4x standard SATA SSD's on the system)

She's chooching mighty fine!

@Fernando:
Thank you for the mod!
I used the uncompressed NvmExpressDxe_3 module, however I'm planning on switching to the uncompressed small version today if that will decrease the boot time.

EDIT by Fernando: Unneeded fully quoted post replaced by directly addressing (to save space)

Switched to the Uncompressed Small version of the module instead of the full version, CSM must still be disabled when the PCIe -> M.2 adapter is installed or the system refuses to post.

NVMe booting still works however the BIOS no longer recognizes the model name of the SSD when using the Small version, now the BIOS only says Windows Boot Manager under the list of bootable UEFI devices without any kind of model code.

Didn't notice much of a difference in the boot time, but I'll keep using the Small version for testing.


Edit: Went back to the full NvmExpressDxe_3 module, here's the BIOS difference:

Uncompressed Small module


Uncompressed NvmExpressDxe_3 module

@Tonico:
NvmExpressDxe_Small has component name protocol (including model name) support removed that results in a size reduction of multiple kilobytes.

Note that community members with very few space in their UEFI BIOS image prefer size over features.

Would you be interested in a new build of NvmExpressDxe that has all the bug fixes and performance improvements from UDK2018 but is also larger than NvmExpressDxe_3?

@Ethaniel

Sure! There's plenty of space left in the UEFI image, I don't mind testing a larger module.

@Tonico:
Please try the attached NvmExpressDxe_4 driver.
Could you please attach a screen shot similar to the previous ones.

Changes:
- Based on UDK2018
- Applied simple bug fixes and performance improvements from NvmExpressDxe_Small
- More user friendly model name and serial number format
- Has more features than NvmExpressDxe_3 but is smaller because of the above optimizations

@Ethaniel

Works great, thank you! :)

Used the uncompressed NvmExpressDxe_4 module, here's a shot of the BIOS:

@Tonico:
Thank you for the screenshot, looks good to me.

@Ethaniel,
@Tonico,

I have an already modded BIOS for ASUS P8Z77 up and running well with the "small" nvme module.
I have modded again this modded BIOS to replace the small nvme bios module with NVmExpressDxe_4 module you offered.
At the end of the modding operation I have this screenshot, it's like good for me:


Do you think it is OK before I flash it ?

What performance improvment do you think ? Is it only when booting ?
I don't think the NVMe module is used after W10 is booted and so we can't expect any storage performance improvment.