Sonnet Technologies through Amazon has the Apple approved Sonnet eGFX Breakaway Box, Thunderbolt 3-to eGPU PCIe Card Expansion System, model no. GPU-350W-TB3Z, for $199 (269 – 70 instant savings) and the 550W model, model no. GPU-550W-TB3, for $299 (349 – 50 instant savings) with Free Shipping for a limited time.
The Sonnet’s eGFX Breakaway Box is a Thunderbolt 3 to PCIe card expansion solution, supports any Thunderbolt-compatible PCIe card, but is designed specifically for bandwidth-intensive graphic video cards. The Breakaway Box enables all the popular GPU cards that support connecting to a computer over Thunderbolt such as AMD Radeon R9 and RX and NVIDIA GeForce GTX7, 9 and 10 series, providing GPU support for computationally-intensive applications and games.