I am aware that the latest version of the inspiron 15 has a usb-c port which is thunderbolt 3 capable. Can I hook up an external gpu to this? I am looking to buy this laptop if it can. If it does support the usage of an external gpu, does the thunderbolt 3 port have 2 PCIe lanes or 4?
Yes, it does support Thunderbolt 3 compatible external GPUs.
The Inspiron 15 7577 Gaming Series system supports standard Thunderbolt 3 protocol/features on external graphic docks. However, performance has not been validated in many third-party Thunderbolt 3 eGfx docks and so users may experience certain unexpected compatibility issues
They are basically telling you to buy a Dell or Alienware external graphics dock or you're going to have problems, but the support for external GPU is built in.
jworley66
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Posted April 8th, 2018 03:00
I had this same question and found this document. See page 5.
http://topics-cdn.dell.com/pdf/inspiron-15-7577-laptop_users-guide_en-us.pdf