Lenovo Yoga 720 - 15.6" Convertible with Active Pen, GeForce 1050 and Quad-Core CPUs

Discussion in 'Lenovo (IBM)' started by ibmthink, Feb 11, 2017.

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  1. thundercracker

    thundercracker Pen Pal - Newbie

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    Hmm sorry to hear that. That's what we get for listening to Best Buy customer reviews I guess.
     
  2. surfaceproartist

    surfaceproartist Scribbler - Standard Member Senior Member

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    It's ok. This misadventure gives me the opportunity to run this machine through its paces, write up a review and return it to Best Buy with a clear conscience!
     
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  3. alaskajoel

    alaskajoel Scribbler - Standard Member

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    Looking forward to it!!
     
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  4. ATIVQ

    ATIVQ V⅁O⅄ Senior Member

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    Review requests: • How large is the gap between the pen tip and cursor • How severe is the line wobble • What's the fan noise at light load (watching a video, browsing the internet) and heavy load (encoding video etc) • Does the non-dGPU version have 4 PCIe lanes for Thunderbolt 3?
    Then I just need to know what are the 4K display specs and it's off to the races.
     
  5. surfaceproartist

    surfaceproartist Scribbler - Standard Member Senior Member

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    No problem except for the last question. Where would I find the answer?


    Sent from my iPhone using Tapatalk
     
  6. cutterline

    cutterline Scribbler - Standard Member

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    HWInfo like this one for the GTX1050 version
     
  7. surfaceproartist

    surfaceproartist Scribbler - Standard Member Senior Member

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    HWInfo reports the same values here. So what does 2x link width mean?
     
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  8. kvoram

    kvoram Scribbler - Standard Member Senior Member

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    That's sad, so Lenovo crippled that device. :(
    The x2 link width means that the Thunderbolt 3 port is only connected with two lanes of PCI Express Gen 3 lanes, giving you only half the bandwidth for data or eGPU use instead of the full 40Gb/s.
    Displayport data is unaffected since that does not use the PCIe lanes, so it can still run two 4k@60Hz screens etc.
    But if you transfer data or connect an eGPU (if it is even supported), you can essentially only use it like a Thunderbolt 2 port.
    Some explanatory discussion with regard to Dell doing the same thing: https://egpu.io/forums/pc-setup/xps-15-9550-not-able-to-reach-40gbps-over-tb3/

    Can you please check if the properties of the Thunderbolt Controller say whether eGPU is supported?
     
  9. surfaceproartist

    surfaceproartist Scribbler - Standard Member Senior Member

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    I'm not seeing a Thunderbolt controller in Device Manager. Where should I be looking?
     
  10. kvoram

    kvoram Scribbler - Standard Member Senior Member

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    I am not 100% sure, but I think you have to go through the Thunderbolt software instead of device manager.

    IIRC, the Thunderbolt controller only appears in device manager when something is connected to it.
     
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