Text rendering worse on eGPU?  

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(@alex_ray_dotte)
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Joined: 9 months ago
Posts: 3
September 21, 2018 7:45 pm  

Has anyone else with a 4k monitor noticed that text in some applications tends to look different when the display is connected to an eGPU and a Thunderbolt 3 MBP vs the internal graphics?

In most apps it's not really noticeable, but when I'm running Visual Studio Code and my favorite color theme (Kimbie Dark) on a Dell P2415Q 4k monitor, the red text in particular is noticeably 'pinkish' and blurry than when connected directly to the MBP's internal graphics. It's bad enough that I usually prefer coding connected to the internal graphics.  Unfortunately the MBP chassis runs noticeably warmer and I lose hardware acceleration for other apps when doing this, so it's not ideal..

I'm using a 2018 13" MBP and an RX 580 with the Breakaway Box, btw. Also have a 32" BenQ 2560x1440 monitor connected to the eGPU that doesn't have this problem.

Soon I will add my system & eGPU details or a build link to this my signature to give context to my posts


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(@alex_ray_dotte)
New Member
Joined: 9 months ago
Posts: 3
September 25, 2018 6:35 pm  

Update: Installing Mojave fixed it.

Dark mode FTW 😎

Soon I will add my system & eGPU details or a build link to this my signature to give context to my posts


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charles_cactus
(@charles_cactus)
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Joined: 3 months ago
Posts: 1
September 28, 2018 1:40 pm  

Even though you already fixed this issue I just wanted to post my own findings that might be useful to someone else. 

In High Sierra I noticed color fringing around text when using an RX 580. It was so bad in Xcode that I considered it unusable, it was worse with a light on dark theme but even with a white background theme (gross) it was still unusably bad. I ended up returning my 580 and upgrading to a Vega 56 for game performance reasons and found that it actually fixed the color fringing issue. So apparently text rendering quality can actually vary from card to card.

Soon I will add my system & eGPU details or a build link to this my signature to give context to my posts


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