MSI x99a GODLIKE: PCI-E Lanes help

[Adria]

Hi!

I need help with my PCI-E Configuration.
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My config:
i7-6900K CPU
MSI X99A GODLIKE GAMING
64GB (DDR4-3200 / PC4-25600) G.Skill Ripjaw V
NVIDIA GeForce GTX 1080 Ti FE 11GB - PCIE #4
Blackmagic Decklink 4K Mini Monitor - PCIE #3
NVIDIA Quadro P400 960 2GB [PNY] - PCIE #1
PSU: Corsair HX1000i
Samsung SSD 960 EVO 512GB (M.2 MB Slot)
Samsung SSD 960 EVO 1TB PCIE #5

Monitor HP Z27q 5K (GTX 1080 Ti) - Using 2 DP
Monitor HP Z27q 5K (Quadro P900) - Using 2 DP
Eizo CG 318 4K (Blackmagic Decklink 4K Mini Monitor)
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I work as a Colorist and I have to use differents GPUs. The GTX 1080 Ti for running DaVinci Resolve, the Blackmagic 4K Mini Monitor for output a 10bit signal to my color grading monitor (Eizo) and the Quadro p400 for UI and using more monitors. I have also a 4th card for a 2nd M.2 SSD using an adaptor.

The problem I have is if I connect ANYTHING in the PCIE #5, the M.2 connected to the motherboard is using the PCH lanes and the speed decrease from 3300MB/s to 800MB/s. I can't either use the PCI-e #2 and PCI-e #3 at the same time and let my PCI-E #5 free.

The GTX 1080Ti is running at x16, the Quadro P400 at x8 (but I don't care cause there's no real impact), The Blackmagic on x4 (uses only 4 lanes) and the M.2 on the PCI-e #5 is running at x4. As you can see I'm using only 32 lanes of 40.

How can I force the M.2 installed on my motherboard to use the others CPU lanes? Or How can I use the PCI-e #2 and PCI-e #3 at the same time? Maybe there's no alternative here cause the motherboard's design but I would like to ask you for help if there's something I can do for fixing this.

Thank you so much,

Adrià

PS: Hope my English is OK haha

[GirlFromYonder]

I think the other 4 lanes are used for other things like IO and stuff. though I am not sure.

[Adria]

16 hours ago, DeezNoNos said:

I think the other 4 lanes are used for other things like IO and stuff. though I am not sure.

No, definitely is not for that...

 

Anyone knows another solution?

[Kevinlvp]

Have you got anything running on SATA?

[Adria]

2 hours ago, Kevinlvp said:

Have you got anything running on SATA?

Nope, I only have two M.2 SSD

[DogKnight]

Some motherboards are setup in such a way that if certain ports are used, others are disabled. 

Usually this is documented in the motherboard manual.

I had the case where if I was using the SATA Express connector on my board, a couple of my SATA ports would be disabled. 

 

Also learnt the hard way that the m2 on my motherboard was only a x2 slot. Easily fixed with a PCIE adapter card though. 

 

Definitely worth reading through the motherboard manual to see if there is any unusual disconnects like this or whether there is a recommended device layout. 

 

DeezNoNos suggestion was valid if you had built in thunderbolt ports for example as they will usually use up PCIE lanes. 

[Kevinlvp]

Looks like your mobo isnt gonna operate all pcie slots at once with m.2 active

[Adria]

Thank you guys for your answer. I think I'm going to buy a bigger M.2 and remove the 2nd one on the pcie slot. I saw that the new x299 chipset can handle more lanes and it would solve all my problems (maybe I'll upgrade the next year).