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Why does Lenovo not support external GPUs connected via Thunderbolt 3.0 on P50 Mobile Workstation ThinkPad systems?


Lenovo does not support eGPUs on P50 ThinkPads because testing revealed a dramatic drop in system performance.


In internal testing on a GeForce GTX 1080 card running on a P50 with Razer Core via Thunderbolt  3.0 (Gen3 x4 PCIe) versus a P510 in Gen3 x16 PCIe slot, Lenovo found dramatic performance losses. This loss is quantified as up to a 20% performance loss running standard CAD applications, with up to 65% performance loss running M&E applications like 3ds Max.


For this reason, eGPU on P50 ThinkPads will remain unsupported.

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I think this is not make any sense.... Thinkpad should make scope for Upgradion both Internal hardwares and external hardwares... 

if i use the EPGU for external displayer not for the internal displayer, so it means the Thunderbolt 3.0 do not need date back to the internal displayer, is it supportable ?