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Hi, everyone !First things first, sorry for my bad English....I'll do my best.I just bought a Core X and Radeon Vega 64 for my MbP 15 late 2016 (16gb RAM, Radeon Pro 460, 1tbSSD, Catalina bêta 10.15.3 (19D62e) and FCPX 10.4.8. I tried with a RX 5500 XT first and the results was so confusing I returned the 5500 for the Vega 64.But the results are similar.....I'm wondering why sometimes the Intel Graphics are used instead of the Radeon and why the iGPU is uses instead the eGpu(Vega 64).It's quite confusing to see the laptop using the bad processing !Last time I tried with clamshell mode and external display connected to the eGpu, it's better but the GC isn't used to the max....what is the point to buy an expensive GC if it's not fully used ????I tried with Call Of Duty and it works fine, only the Vega is used, same with Caputre One Pro 20.