Cheapest eGPU to fit GTX 1080 to work w/ 2019 MacBook Pro
Check the eGPU.io Buyer Guide.
Choose an eGPU that uses a TI83 instead of a TI82 because TI82 is not compatible with macOS.
Follow this instruction for choosing GPU max power
3 Meet or exceed your intended video card's peak power requirements. See TechPowerUp card reviews, eg: GTX1080Ti to find this.
For a 1080 that isn't overclocked, maybe 225W is enough for GPU max power.
Check the Builds page for builds that include the 2019 MacBook Pro. Select Apple for brand, select MacBook Pro for model, and filter using "2019 " with a space character, for model year.
I found only two:
Yeah, I was wondering if this: https://www.aliexpress.com/item/33047416121.html?spm=a2g0o.productlist.0.0.17793556OqiNXK&algo_pvid=3ce7bc36-bac4-4a7c-b4cd-57e6b721a4f7&algo_expid=3ce7bc36-bac4-4a7c-b4cd-57e6b721a4f7-3&btsid=5e849a00-5b08-4a01-816b-80f57420f456&ws_ab_test=searchweb0_0%2Csearchweb201602_8%2Csearchweb201603_52 would work? I would then buy a PSU and maybe build my own enclosure?
The one with the lowest price? Availability, quality, cooling, power, features are also considerations.