Once I connected the eGPU Pro to this same Mac Mini, such timelines played fluidly and, in fact, more effects could be layered onto clips. But, when I added a mask to the blur, it quickly dropped frames during playback. For example, with the standard Intel GPU, I could add color correction, gaussian blur, and a title, and playback was generally fine with a fast drive. However, if you tend to use a number of effects that lean on GPU power, you will see an impact on real-time playback. In my Mac mini review, I concluded that a fully-loaded configuration made for a very capable editing computer. So yes, editors will get faster exports, but they will also enjoy a more fluid editing experience. The eGPU will also improve real-time playback of effects-heavy timelines. An eGPU will allow more connected displays of higher resolutions than an underpowered Mac would normally support on its own. External GPU technology is very much about real-time image output. Not every function of an application uses the GPU, so many factors determine rendering. Users who are unfamiliar with external GPUs assume that the advantage is in faster export and render times, but that's only part of the story.
It wouldn't be worth the investment, unless you need one to connect additional high-resolution displays. A Blackmagic eGPU or eGPU Pro wouldn't provide an edge to the render times of an iMac Pro, for example. External GPUs benefit Macs with low-end, built-in GPUs, like the 13" MacBook Pro or the Mac mini.
When you pull up the Activity Monitor, you can easily see that the internal GPU is loafing while the eGPU Pro does the heavy lifting during tasks such as rendering. The application does not combine the power of both GPUs for maximum performance. With Mojave, most current creative apps, like Final Cut Pro X, Premiere Pro, Resolve, etc, offer a preference selection to always use the eGPU (when connected) from the application's Get Info panel. You'll need a Thunderbolt 3 connection from the computer and then either eGPU model becomes plug-and-play with Mojave (macOS 10.14) or later. This means you can connect multiple peripherals and displays, plus power your laptop. The eGPU Pro includes two Thunderbolt 3/USB-C ports with 85W charging capability, HMDI, DisplayPort, and four USB-A type connectors for standard USB-3.1 devices. The two eGPU models are nearly identical in design, but in addition to more processing power, the eGPU Pro adds a DisplayPort connection that can support 5K monitors. It sports the Radeon RX Vega 56 - a similar model to the one inside the base iMac Pro configuration. That challenge has been answered with the new Blackmagic eGPU Pro. Many questioned its choice of the Radeon Pro 580 chip instead of something more powerful. Blackmagic Design responded with the release of its AMD-powered eGPU model. Last year Apple embraced external graphics processing units. How much faster? Read our review of the Blackmagic Design eGPU Pro to find out! Your Mac will be much faster with an eGPU.
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