I have doubts that you can get it working. LGA 1151 based Processors can bifurcate to either 8x/8x or 8x/4x/4x, NOT 4x/4x/4x/4x like the HEDT/Xeon E5 platform can, which is what you need. Even if you could enable in-slot bifurcation, your card is only 8 lanes wide, so as a 4x/4x card, it would make contact with the contiguous 8 lanes thus only see one PCI Device. I suppose that it may be possible if you get a card like the AsRock one, bifurcate to 8x/4x/4x in the same slot, then use NVMe slots 1, 3 and 4, but I don't recall if I have seen such setup working, just that on paper it seems possible. Your other alternative is a card with a PCIe Switch and no bifurcation.

@zir_blazer - sounds like you have looked into this correct? If yes, did you also look at changing the related settings in Intel ME setup, in conjunction with BIOS settings?
If you are not sure what I mean, I posted some example images of this in another thread for a different board here
Utility to view some info on PCI devices

So his card wont work even at x4/x4 correct?

Zitat von Lost_N_BIOS im Beitrag #17

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@zir_blazer - sounds like you have looked into this correct? If yes, did you also look at changing the related settings in Intel ME setup, in conjunction with BIOS settings?
If you are not sure what I mean, I posted some example images of this in another thread for a different board here
Utility to view some info on PCI devices

So his card wont work even at x4/x4 correct?

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Thanks, I know very little about PCIE lanes, so we're both at a loss one way or the other Thanks for explaining to me that way. Yes, Lane Reversal is one of the settings you can change in Intel ME setup, sounds similar to what you mention.
However, most you can manually choose the opposite anyway, so reverse not always needed anyway (example 4x1 or 1x4) I initially assumed any 16x or 8x slot would be enough to run the 8x card (at 4x/4x) even without a BIOS edit, but seems it's not that simple
If you open an Intel ME file in Flash Image Tool (FITc) and look at these ME Flex I/O settings for lane width and the available options it may fall more in line with what you're reading, or maybe not?

Here is this boards actual settings, the options box in each area is a cutout I placed there, those shown are available for each of the sections they are placed near


I think setting x4 at top and 2x2 on bottom = 8x/8x, but that may disable some other devices too. Or x2 at top and 2x2 on bottom = 4x/4x at a single slot.
But, I'm not certain and that is why I mentioned right up front I'd rather him have a programmer for recovery in case needed because I know these also control HDD and display too and if recovery is needed it may only be possible with programmer in some instances.
But in the end it may not be possible due to no actual bifurcation setting in the BIOS currently, I was hoping maybe some of the other hidden BIOS settings may help him get it working at one of the current slots.
After all this discussion, and what you mentioned, it makes me think even if we did change lane widths etc, BIOS would still need bifurcation specific setting, correct?
There is a thread here someone added it to their BIOS, maybe I can find and do that here. Ahh, found it - [Guide] - How to Bifurcate a PCI-E slot
I may have to ask him for help on this, or if it's even possible in this BIOS.

@davidm71 - using your guide, or even enabling bifurcation is maybe not possible on this board correct, I do not see IntelRCSetup in BIOS, thanks for your time if you look for us!
https://www.supermicro.com/about/policie...wareItemID=6755

The screenshot that you posted is for the Chipset PCIe Lanes, these should be completely unrelated as the one that you want to modify are the Processor lanes. Check Page 28 / Table 3 - 1 of this Data Sheet for basic info about the Chipset PCIe Lanes and Intel Flex IO. Basically, the Chipset PCIe Controller is partitioned as 5 Controllers with 4 Lanes each, and each of those controllers can be configured as 1 Slot with 4 Lanes, 2 Slots with 2 Lanes each, 1 Slot with 2 Lanes + 2 Slots with 1 Lane each, or 4 Slots with 1 Lane each. That is exactly what is on your last screenshot.


It seems that it is possible to enable 8x/4x/4x bifurcation for the Processor with the current things that you already have. If you check the screenshots that you posted here, notice that you have PEG 0:1:1 and PEG 0:1:2. These corresponds to PCI Addresses that are conceptually identical to this:

00:01.0 PCI bridge [0604]: Intel Corporation Skylake PCIe Controller (x16) [8086:1901] (rev 05)
00:01.1 PCI bridge [0604]: Intel Corporation Skylake PCIe Controller (x8) [8086:1905] (rev 05)
00:01.2 PCI bridge [0604]: Intel Corporation Skylake PCIe Controller (x4) [8086:1909] (rev 05)

On a typical Motherboard that has three PCIe Slots wired to the Processor PCIe Controller, like for example, my Supermicro X10SAT, the bifurcation is automatically done if you populate the other Processor PCIe Slots (That happens because an independent PCI Slot has some extra Pins for card detection which I suppose that the Firmware can check, but that is pretty much worthless for in-slot bifurcation with logically separated PCI Devices like some PCIe-to-M.2 adapter cards. These have to be forced, can't be autodetected).
Basically, if I have either one or no card inserted into the first 16x slot (16x mode), I have only this:

00:01.0 PCI bridge [0604]: Intel Corporation Skylake PCIe Controller (x16) [8086:1901] (rev 05)

If I put a card in the third 16x slot, EVEN if the other two slots are not populated, the Firmware puts the Processor PCIe Controller into 8x/4x/4x mode and I get the three PCI Bridges (00:01.0, 00:01.1 and 00:01.2). With a single card in the middle slot I get two PCI Bridges (00:01.0 and 00:01.1).


What you want to do is that instead of "auto", PEG 0:1:1 and PEG 0:1:2 are forced enabled. In Linux a simple lspci will tell you if bifurcation is working. However, as I stated before, the M.2 adapter card that the guy that started this Thread has will never work, unless a miracle happens and you figure out how to use reverse mode so that the slots provides 4x/4x/8x, so that it will match the physical needs of the card.

Thanks for this info! Now at least I know what that is for, but do you know what editing those can be useful for, anything similar to what I wanted to do here?

Yes, I thought with the unhidden BIOS settings he would be able to get something figured out, and there's another section that I didn't post images of, it has PCIE Function swap (Default disabled), and entire pages of settings for each PCIE lane 1-24, one of which the settings has an option that is M2 (!)
And also some RST/SATA settings that may help him too, involving PCIE, all shown below

Thank you for the setting suggestions and all this info I'm sure those will help him. I only planned to enable the setting to be visible for him, and then he could change, so I'm sure that will help.

Here is the complete BIOS in print screens, hope to get them all...I split them into two zip files because of size...

Please let me know if you need anything else.

I separated the PEG config prtscr in advanced zip file, as I think that is the important one, right?

Thanks @patak17, I will check this all out, but I think maybe as mentioned above we wont have any luck with this

@Lost_N_BIOS If it works it will be awesome, if not, I really appreciate the effort, I know that there is no guaranties...in any case Thank you!

OK, here is largely unlocked BIOS, nearly all sections and settings should now be visible. Some sections may be empty, if so let me know and I will fix. This is due to sometimes enabling at root level enables all within, so I leave some like that.
Other times you must go inside after enabling root and further enable the settings within, I did not do that for some things because no need to enable something that may already be enabled due to root enabling, so let me know if anything new is empty.
You can also compare sections with AMIBCP, if you see something missing let me know I can enabled.

BIOS lock is enabled, so you will have to boot to efi shell / grub to disable BIOS lock, since you are not using a hardware flash programmer right now.
Here is my guide on doing this unlock - [GUIDE] Grub Fix Intel FPT Error 368 - BIOS Lock Asus/Other Mod BIOS Flash
Few things to note before/while reading the guide and doing this unlock before you can flash this mod BIOS. When guide says rename the shell.efi file, you need to rename to >> Shell.efi (If it's already that, great, nothing to rename - I forget file name in guide, sorry )
You can start guide mainly on step #6, because here is your variable you need to edit >> 0x8BA

So at grub prompt you will type the following
Setup_var 0x8BA 0x0

I have enabled this section for you to edit/change the BIOS Lock setting later at the BIOS level if you want, and set it to disabled for now (So next flash, after this it will already be disabled). Advanced >> Chipset Config >> PCH I/O >> Security
This will be reset to default any time you flash a new stock BIOS (all these mod changes will be lost then too)

Then, to flash BIOS download this Intel ME System Tools package - https://mega.nz/#!GRFHjQyY!OyVZDCdMQmWku...aSvA2vsQd51wxDI
Inside you will find Flash Programming Tool folder, and inside that find WIN32 folder. elect the WIN32 folder, hold shift and press right click, choose "Open command window here"
At the command window type the following command, and send me the resulting file, this way I can put your board specific details (Serial, UUID, SLIC Keys etc) back into the mod BIOS before I send it to you

FPTw.exe -bios -d biosreg.bin

@patak17 - Sorry, I should have had you give me this before I got started, forgot until I was typing this out about to send you mod BIOS (So mod BIOS is not 100% ready yet, need to put in your details but that's a quick swap)

@Lost_N_BIOS Hi, thanks for quick reply...here is the bin file, from the computer that needs modded BIOS...is that what you need ?

In the meantime I will unlock the bios... :)

Thanks! @patak17 - Yes, that's what I needed, here is BIOS mod, flash using command below, similar to how you created the dump - http://s000.tinyupload.com/index.php?fil...660008704794694
FPTw.exe -bios -f ModBIOSReg.bin

@Lost_N_BIOS Hi, regarding BIOS lock disable...on USB stick there should be only Shell.efi in root, nothing else, right ? Thanks!

There can be other files, just make sure Shell.efi is in root iof the USB (no folder) and that you follow what the rest of the guide mentions about disabling secure boot.