Lenovo z70-80FG eGPU exp gdc  

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(@mumsford)
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Joined: 1 month ago
 

Hey guys,

i just installed a testbuild to my lenovo z70-80. (I7 5500U)

My setup contans:

GTX 980

Dell DA-2 220W PSU 

EXP GDC Beast 8.4 NGFF 

So i thought it should be possible to get PCI-E x2 working but unfortunately it is running on x1. Is there any chance to get x2 working properly?

 

This topic was modified 1 month ago

Lenovo z70-80FG (GTX 980 exp gdc)


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joevt
(@joevt)
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Joined: 2 years ago
 

What M.2 port did you use? Link to a manual or documentation about the port? Pictures? Did you check Device Manager to see if the port is capable of more than one PCIe lane? Or HWiNFO? Or use lspci from pciutils (maybe in linux if you can't get it installed in Windows).

Is the M.2 slot key A (or A+E) (socket 1), key B (or B+M) (socket 2), or key M (socket 3)?

Key A+E can do PCIe x1 (possibly two PCIe x1 connections? http://www.mfactors.com/p11s-p11f-m-2-ngff-to-pci-e-exender-board/ )
Key B+M can do PCIe x2 or SATA ( http://www.mfactors.com/p14s-p14fp-m-2-ngff-to-pcie-x2-edge-extender-board-formerly-p14s-p14f/ )
Key M can do PCIe x4 or SATA.

Does your EXP GDC Beast have one or two HDMI inputs? I think a single input means only one lane of PCIe (PCIe x1).

Here's a link that shows the key A version and the key M version. The key M version has two HDMI connectors for PCIe x2.
https://geekworm.com/products/exp-gdc-pcie-pci-e-laptop-external-independent-graphics-card-adapter-docking-stations?variant=19396469456954

If you have key M then you shouldn't use an EXP GDC Beast because there are solutions that allow PCIe x4.
https://www.adt.link/product/R43SG.html
https://www.adt.link/M2.html

Mac mini (2018), Mac Pro (Early 2008), MacBook Pro (Retina, 15-inch, Mid 2015), GA-Z170X-Gaming 7, Sapphire Pulse Radeon RX 580 8GB GDDR5, Sonnet Echo Express III-D, Trebleet Thunderbolt 3 to NVMe M.2 case


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(@mumsford)
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Joined: 1 month ago
 

I am using the NGFF Cable like shown here:

The exp gdc has only one hdmi input. 

Here is a log from HWWINFO and also two pictures from the slot on the laptops motherboard i am currently using. In one picture the WLAN card is still present.

https://drive.google.com/open?id=1AEOB86sqc777dG4tF1M7p6sHBxa8XL1a

https://drive.google.com/open?id=1Y-2-R8ptsNAesQ5jgATOqzUalK2zyvns

https://drive.google.com/open?id=12fFR3Z2a-aEBupKhkn8EDKXRhpDsHw1Y

Lenovo z70-80FG (GTX 980 exp gdc)


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joevt
(@joevt)
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Joined: 2 years ago
 

Actually there's an EXP GDC Beast 9.0b that does M.2 PCIe 3.0 x4:
https://egpu.io/forums/builds/exp-gdc-beast-v9-0b-just-arrived/

 

Mac mini (2018), Mac Pro (Early 2008), MacBook Pro (Retina, 15-inch, Mid 2015), GA-Z170X-Gaming 7, Sapphire Pulse Radeon RX 580 8GB GDDR5, Sonnet Echo Express III-D, Trebleet Thunderbolt 3 to NVMe M.2 case


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(@mumsford)
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Joined: 1 month ago
 

I found a PCI E Slot in HWINFO with capability of x4 and it says "empty" but the only device i can remove, is the WLAN Card. And due to HWINFO it is only capable of x1. So i think a have no chance in this Laptop, to get x2 working. I thought it might be a BIOS option, because i read that  I7 5th generation capable of x2. 

x4 3.0 is possible for i7 6th generation and above so i think the 9.0 beast is no option for me. 

Lenovo z70-80FG (GTX 980 exp gdc)


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joevt
(@joevt)
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Joined: 2 years ago
 

@mumsford

In your picture, you show the WiFi is using key A+E. We expect this to allow only PCIe x1. We examine the PCIe info to be sure:

In the HWiNFO report, it shows the GTX 980 is a 16x 8.0 GT/s card that is connected as 1x @ 5.0 GT/s. Your laptop doesn't support 8.0 GT/s. Shouldn't the GTX 980 be idling at 2.5 GT/s, unless you're running some rendering app?

The HWiNFO doesn't contain enough information to rebuild the PCIe device tree. Specifically, the PCI-to-PCI Bridge devices do not show secondary and subordinate bus numbers. But if you consider that HWiNFO appears to traverse the PCIe tree depth first (since a bus 0 device follows a bus 2 device) as shown here:

egrep "PCI (Address|Bridge)"  /Volumes/Storage/Downloads/HWiNFO64.txt

  Device Class:                           Host-to-PCI Bridge
  PCI Address (Bus:Device:Function) Number: 0:0:0
  PCI Address (Bus:Device:Function) Number: 0:2:0
  PCI Address (Bus:Device:Function) Number: 0:20:0
  PCI Address (Bus:Device:Function) Number: 0:22:0
  PCI Address (Bus:Device:Function) Number: 0:27:0

  Device Class:                           PCI-to-PCI Bridge
  PCI Address (Bus:Device:Function) Number: 0:28:0

  Device Class:                           PCI-to-PCI Bridge
  PCI Address (Bus:Device:Function) Number: 0:28:2
	  PCI Address (Bus:Device:Function) Number: 2:0:0

  Device Class:                           PCI-to-PCI Bridge
  PCI Address (Bus:Device:Function) Number: 0:28:3
	  PCI Address (Bus:Device:Function) Number: 3:0:0
	  PCI Address (Bus:Device:Function) Number: 3:0:1
  PCI Address (Bus:Device:Function) Number: 0:31:0
  PCI Address (Bus:Device:Function) Number: 0:31:2
  PCI Address (Bus:Device:Function) Number: 0:31:3

Then we can assume that the Nvidia card on bus 3 is connected to the Root Port #4 at 0:28:3. The Root Port says the Maximum Link Width = 1x so we can say that we can't get more lanes from the M.2 WiFi slot. The Maximum Link Speed is 5.0 GT/s. We saw that the Nvidia is running at the max link speed of the slot.

Therefore, we can't get more performance from the M.2 WiFi slot.

I think you mean i7 5th generation is capable of PCIe gen 2 speed (5.0 GT/s).
https://ark.intel.com/content/www/us/en/ark/products/85214/intel-core-i7-5500u-processor-4m-cache-up-to-3-00-ghz.html

i7 6th gen is capable of gen 3 speed (8.0 GT/s).

But this doesn't rule out an x4 slot (and any gen 2 capable computer can include a gen 3 PCIe switch to support gen 3 speed - but that's not something you would see in a laptop).

Is there anything on your laptop motherboard labeled J8C1? J stands for jumper - used for ports and connectors. It could be an artifact in the BIOS meant for some other motherboard.

I don't see any 4x capable root ports or bridge but maybe HWiNFO doesn't show those that don't have something connected?

 

This post was modified 1 month ago

Mac mini (2018), Mac Pro (Early 2008), MacBook Pro (Retina, 15-inch, Mid 2015), GA-Z170X-Gaming 7, Sapphire Pulse Radeon RX 580 8GB GDDR5, Sonnet Echo Express III-D, Trebleet Thunderbolt 3 to NVMe M.2 case


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(@mumsford)
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Joined: 1 month ago
 

@joevt

hey thanks for that detailed answer

If i am just on desktop, doing office stuff and surfing, the GTX switches to x1 1.1 so i think thats 2.5GT/s instead of 5.

Connection is great and I was hoping to get a second line from my wifi card slot. I see, thats not possible, but it was worth the question.

I checked the pictures I took during flashing the bios chip to remove the whitelist and I can't see anything labled with J8C1.

Is there another tool to get a more specific report of my hardware? 

While disassembling the laptop I could not see any other free slots except the one from my wifi card, so searching for another connection is obsolete, I think.

There is only one option to check, there is an option in my unlocked bios, to set every pci port to Gen3. Is this a faulty bios option due to unlocking, or might it be worth a try? I can't reset my bios right now, so I can't risk to change the option until the weekend.

Lenovo z70-80FG (GTX 980 exp gdc)


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joevt
(@joevt)
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Joined: 2 years ago
 

Posted by: @mumsford

There is only one option to check, there is an option in my unlocked bios, to set every pci port to Gen3. Is this a faulty bios option due to unlocking, or might it be worth a try? I can't reset my bios right now, so I can't risk to change the option until the weekend.

Could be (probably) a faulty bios option due to unlocking. I wouldn't try it unless you know it's possible to undo it. 

I wonder what PCIe devices it can affect? If you are able to set it, then compare a new HWiNFO report to see if anything changed.

I suppose a properly functioning PCIe device could try gen3, then fall back to gen2 if link training fails. gen3 won't even be attempted if it's not set in the PCIe capabilities register.

Mac mini (2018), Mac Pro (Early 2008), MacBook Pro (Retina, 15-inch, Mid 2015), GA-Z170X-Gaming 7, Sapphire Pulse Radeon RX 580 8GB GDDR5, Sonnet Echo Express III-D, Trebleet Thunderbolt 3 to NVMe M.2 case


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(@mumsford)
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Joined: 1 month ago
 

I'll check the option on the weekend, maybe it'll make a difference, maybe not. I'll post the result here

Lenovo z70-80FG (GTX 980 exp gdc)


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(@mumsford)
Active Member
Joined: 1 month ago
 

Okay, i checked the option but it is not possible to set Gen3 for this PCIE Port. So I think all my questens are answered for now. Thanks a lot!

Lenovo z70-80FG (GTX 980 exp gdc)


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