Thinking about adding an eGPU. Laptop board has an unsoldered NGFF Key-A connector.

Discussion in 'Hardware Components and Aftermarket Upgrades' started by GTMoraes, Jul 12, 2018 at 12:40 AM.

  1. GTMoraes

    GTMoraes Notebook Consultant

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    Hey,

    I'm thinking about adding an eGPU. I don't want to kill the Wi-Fi card, and as this laptop had an option to come with an SSD, I figured I could use the spare NGFF port to connect the eGPU thing.

    However, unfortunately Lenovo seems to have saved $0,03 and skipped adding the actual connector, which seems to be an actual NGFF Key-A connector, meant for the NVMe SSD. I've seen some decade-old threads of people soldering Mini PCIe and SIM card slots to their laptops and netbooks and it worked without doing much else, so I'm wondering whether it would be possible for me to solder an actual connector and make it work.

    I think I have enough soldering iron skills to solder the connector, but I'm unsure if the rest of the circuit is complete, in order for it to work. I couldn't find a picture of this laptop board with the SSD option, so I'm lost here.

    Here it is:
    https://i.imgur.com/Y2hJ54K.jpg

    Can something be made out of this, if it's missing something (other than the connector, of course), or it can't be said just by this picture?

    Thanks
     
  2. senso

    senso Notebook Evangelist

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    Soldering a socket isn't hard, and the only missing components at least on that side of the board is a pair of decoupling caps, looks like 0603 size, so a pair of 25v 10uF X7R 0603 ceramic caps should if the bill, but on the back side there might be more missing components, either resistors and/or caps(on the RX/TX differential pairs of the PCIe interface).
     
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  3. Starlight5

    Starlight5 So what if I'm crazy? The best people are.

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    @GTMoraes A-key connectors are not meant for SSDs, only WLAN cards - and laptop boards don't include more that one A-keyed m.2 slots, so it's likely B-key. B-key may not even have PCIe lanes attached to it at all (lazy Lenovo and many others); could be M-key if you're very lucky but I really doubt it. Bottom line, I'd say skip it unless you get the schematics.
     
  4. GTMoraes

    GTMoraes Notebook Consultant

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    I might've mistaken they key type then. This slot is meant for the SSD, so it's whatever they'd use for it. IIRC, they did use the PCI-e lanes, because the SSD speeds on this laptop with SSD options were blazing fast

    I'll try getting the photo of the back of the board when I disassemble this laptop again
     
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  5. zsolti900

    zsolti900 Newbie

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    I woould like buy egpu,but i dont know how can i connect this. I have Asus ROG g751JY, but i dont know where is the mini pci .
     
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