Hey guys,

Do you know if this is even possible?

The board supports x8/x8 configuration.

Also, is there like a tutorial or what to do if this is even possible, so I can replicate in case of a future BIOS update/mod?

@DarkPoe - You need Gaming SLI model, this model only supports Crossfire.
As for as inserting SLI license and functionality, I've never seen such done, so I'm not sure this is possible?

@ket @_haru @dsanke @MiesMosel @PCGH_Torsten @davidm71 @Fernando @Mov AX, 0xDEAD @diderius6
Do any of you know if this is possible, or have you seen anyone try/can link info/discussion so I can look it over etc - Thanks!

@Lost_N_BIOS well I see this can be done like here

[GUIDE] How to make your Mainboard SLI compatible without a BIOS mod

And AFAIK, if the board supports at least x8/x8, it would only need a SLI Certificate, which could be had from the Gaming SLI or another Z390 board

Anyway, I'm just throwing random thoughts, but I guess this could be possible in any way... Right?

Thanks :)

@DarkPoe - Thanks for the link, that's mainly what I tagged all those other users for, I was not aware of such mod so needed info before I could say if it was something I could do for you or not.
So yes, correct, I can grab the SLI cert from the SLI model. Ohh, that is not about BIOS editing, that's something you do on your end with USB Stick. I still need relevant or similar BIOS Mod info instead.
Looks like DSDT Table edit (GUID C118F50D-391D-45F4-B3D3-11BC931AA56D in Gaming SLI BIOS) or similar may be needed, not just grab and insert some SLI module/cert

Yes I see the link I provided shows the guide to do with somehow tampering with the EFI bootloader, but this would have to be done everytime I somehow recreate the EFI boot (full HD/SSD format, new HD/SSD, etc...) or something else, which seems to me it would be not so clean as to, like you said, patch the DSDT Table with the SLI Certificate

Attached is the DSDT.bin I could save from using this RWEverything on Windows... Maybe this could help?

I'm off to sleep. Thanks for everything :)

Yes, it would need redone if you wipe the drive or move to new drive, or at least copied back into those areas once new OS rebuilt. I have extracted DSDT from each BIOS already, so no need for anything from RWE.
I assume all you need is someone to edit DSDT for you, which I am not familiar with and the above guide is really not helpful due to step #3 is not properly or fully explained. And I'm not 100% sure that kind of edit applies to actual BIOS module DSDT either (MUCH larger in size).

So someone more familiar with this kind of editing will have to help, or a better more complete, BIOS oriented editing guide/info is needed and then maybe I could do for you.
Hopefully one of the users I tagged above can do this for you, or can link us to more relevant BIOS editing info relating to this kind of edit

I think comparing to BIOS mod , installing 2 GPU with X8+X8 is more difficult.
How do you bifurcate the main PCIE x16 to double x8?

SLI won't run on boards that are not SLI certified by nvidia, because nvidia are dicks. They make manufacturers pay a license fee to "enable" SLI support, if the driver doesn't detect the certification then it'll stick its middle finger up at you and thats that. I wish board manufacturers would band together and all agree to not pay nvidia that license fee it wouldn't take NV long to change their mind about that fee if manufacturers all agreed to drop SLI support, which lets be honest, maybe only about 3% of users actually use SLI these days multi-GPU is dead.

@dsanke - Thanks for your reply! He means both x16 PCIE slots used in SLI mod, so 8x 8x for each slot/PCIE card, not bifurcation.
Sorry, i thought maybe you knew some hack, or method to insert SLI certificate into BIOS, similar to what is done at link in post #3

@ket - I've seen this bypassed in the past, but back in the day (Asus, crossflashing etc) - I thought maybe you'd be familiar with same as I mentioned above (cert into BIOS)

I guess maybe, I will have to learn how to edit DSDT and see if I can do it for him maybe? It's going to be that, or help him crossflash to similar board BIOS

@Lost_N_BIOS The Z390 Aorus Elite do not have both x8 , it only have x16 from CPU , and other "x16" is x4 from PCH.

@dsanke - Ahh! Thanks, I did not notice. So, even if he had SLI cert, it would be 8x + 4x, same for crossfire to then, correct?
I'm sure he'd still want this, but I guess he should really first test out the linked method in #3 to see if it even works that way first, before I put any time into a BIOS mod.

Zitat von Lost_N_BIOS im Beitrag #9

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@dsanke - Thanks for your reply! He means both x16 PCIE slots used in SLI mod, so 8x 8x for each slot/PCIE card, not bifurcation.
Sorry, i thought maybe you knew some hack, or method to insert SLI certificate into BIOS, similar to what is done at link in post #3

@ket - I've seen this bypassed in the past, but back in the day (Asus, crossflashing etc) - I thought maybe you'd be familiar with same as I mentioned above (cert into BIOS)

I guess maybe, I will have to learn how to edit DSDT and see if I can do it for him maybe? It's going to be that, or help him crossflash to similar board BIOS

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@ket From my test, the certification only check PCH.
@Lost_N_BIOS I don't know whether the PCIE from PCH support SLI or not , but I see all SLI compatible motherboard using PCIE from CPU , not PCH.

I extract SLI certification from Z390 Master and insert it to DSDT , and modified this BIOS.
Here is the download link. http://s000.tinyupload.com/?file_id=22684120988029661566
Just flash via Q-Flash in BIOS , and test it.
I do not expect it work unless you bifurcate the main PCIE x16 to double x8.

Even if you successfully mod the BIOS you will still need a modified driver to enable SLI using any PCIe x4 slot, I have proven this works on the x4 PCIe slot from the chipset - for example this is my 3DMark Firestrike score using GTX580 SLI on a Gigabyte Z170-HD3-DDR3 crossfire only motherboard.

@ket - yes, I assumed so, and hoped maybe once I got in there I'd be able to figure out board ID's etc. I've never edited DSDT before, so I may not be able to do it anyway.

@dsanke - Sounds like probably not possible here then, due to other slot coming from PCH and the other SLI boards do not do that. Ahh, I see Chinobino says this is possible, so maybe some hope after all!
How can you tell where each slot comes from? I checked manual, and at least on this model it doesn't show block info anymore at the top of PDF
He'd need riser card with split connectors to do 8x8x from single slot, if we could even bifurcate that slot probably not something anyone would want to do, even if possible.

@chinobino - Great to hear, thank you!! Maybe we can do something here then, if I can modify the DSDT table correctly and insert the cert properly.... Or, is that maybe something you can do for him?