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badger707 / m920q-pcie-bifurcation

Lenovo M920Q PCIe x8 bifuration to x4x4
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Lenovo M910X Works #6

Open systemerror-codenotfound opened 2 months ago

systemerror-codenotfound commented 2 months ago

The diagram for M910X should be similar to this, this is from a M710Q as i couldn't find one for the M910X https://images.boosty.to/image/e28a63ee-ad04-4562-828a-b6a58697e4db?change_time=1674190987&croped=1&mh=625&mw=575

And this is the one for the M920Q https://cxema.su/_sh/37/3745.jpg

and the Q270 in m910x chipset support the same bifurcation as the M920q

https://www.intel.la/content/www/xl/es/products/sku/98088/intel-q270-chipset/specifications.html

1x16 or 2x8 or 1x8+2x4

If i'n not wrong, right now you are getting 3 x4 pci ports from the actual PCI, 2 by bifurcating the PCI in 2 x4 and one x4 from the chipset As per other comment in the @badger707 repo the pads are almost exactly the same and somebody actually tried to bifurcate it and it appear as 2 x4 lines and 1 x4 line, so the bifurcation on the CPU side works

After testing i can confirm that this works on the M910X also with an EM5082NV image

image

xraive commented 2 months ago

@systemerror-codenotfound thanks for this, does this mean the m910x could support the dual m.2 NVME and possibly dual 10G card together?

I'm looking to purchase the riser card here (https://github.com/j4cbo/tiny5-m2-riser)

systemerror-codenotfound commented 2 months ago

@systemerror-codenotfound thanks for this, does this mean the m910x could support the dual m.2 NVME and possibly dual 10G card together?

I'm looking to purchase the riser card here (https://github.com/j4cbo/tiny5-m2-riser)

You would have 2 nvme's on the bottom part and 2 x4 pci 3.0 lines in the pci with this mod

You could have 2 nic's with dual ports each, so 4 ports in total

You can't use that adapter, that one is for m920 and the m910x has another pinout on the pci connector slot

xraive commented 2 months ago

@systemerror-codenotfound So just to confirm the 910x can't support 3 pci devices (2 drives plus nic), it's either the additional drives or the nic's right?

systemerror-codenotfound commented 2 months ago

from the information that i have, it's only 2 devices

@systemerror-codenotfound So just to confirm the 910x can't support 3 pci devices (2 drives plus nic), it's either the additional drives or the nic's right?

xraive commented 2 months ago

@systemerror-codenotfound sorry for all the questions, do you know the model of the riser card that can support the two pci devices? I was looking to add an extra storage and a nic, but form what you're saying it's not possible?