Blackmagic eGPU Pro

If you have a Mac that doesn't cut it in the graphics department and don't have the budget to spend a minimum of $5000 on a new iMac pro then the Blackmagic eGPU Pro is a better alternative. At $1199 it adds iMac pro graphics capabilities to your existing Mac for less than a quarter of the price. As long as your Mac as Thunderbolt 3 it will work with the Blackmagic eGPU Pro.

You’ll be able to run incredibly graphics-intensive workloads that were previously possible only on iMac Pro. The GPU has 8GB of HBM2 memory, two Thunderbolt 3 ports, four USB 3 ports, an HDMI 2.0 port, and a DisplayPort 1.4 port, allowing for 85W of power to charge your MacBook Pro at the same time. The new Blackmagic eGPU Pro allows accelerated graphics-intensive pro app workflows and super smooth gaming, enables VR experiences or content creation, and supports multiple accessories for the ultimate workstation setup.
Source - Apple