AMD Radeon Pro Duo Updated with two Polaris GPUs | Geeks3D
AMD RX 580 vs Vega 56 (eGPU Edition) on Thunderbolt 2 with a Late 2013 Macbook Pro - YouTube
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External GPU with AMD Radeon Pro 580 8GB will increase speeds 2.8 times on the 15-inch MacBook Pro. - YouTube