The Ultra settings in 4K is pretty amazing.
#EXTERNAL GPU ENCLOSURE MACBOOK PRO UPDATE#
This seems to work well, as I’m getting 35-75fps with everything maxed at 4K (more on this in a minute). Hopefully Zwift will update to properly recognize the Vega 64 to enable Ultra and 4K resolution by default I have opened a support ticket for this. I have manually edited my ‘High’ config file, and the ‘prefs.xml’ to enable Ultra settings at 3840x2160 resolution. Unfortunately, Zwift does not recognize the Vega 64 as a high-end card and locks me in on the ‘High’ quality setting and will not go above 1440p in game. If I start Zwift with the MacBook Pro open, it starts running on the Mac’s internal screen, which is powered by it’s own discrete GPU, and will not setup properly for the Vega 64 if I drag it to the second monitor (the tv in this case). This forces Zwift to start on only the TV, which is being powered by the Vega 64. With the release of High Sierra 10.13.4 recently, Apple has officially enabled eGPU support for Macs. The first thing I figured out is that because Zwift locks into the GPU (and subsequent quality and resolution settings) upon initial startup, I have to start Zwift with the MBP closed in clamshell mode. The external GPU box has allowed me to keep my setup very simple, and not have to maintain/update/troubleshoot/support an entirely separate PC just to run Zwift. There’s a couple of hiccups that I’ll explain below. The good is that it works pretty darn well, without a ton of effort. The Vega 64 is then connected to a 49" 4K tv via HDMI. I’m using the Sonnet Breakaway 650w box with the Vega 64 (technically the ASUS ROG Strix Vega 64 flavor) installed in it and connected to the MBP via Thunderbolt 3. Just thought I would share my experience in using Zwift with a Mackbook Pro (2017 - 15") with an external GPU (eGPU) box with an AMD Vega 64 GPU.
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