State of eGPU for Macs – Catalina 10.15 Update
 
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State of eGPU for Macs – Catalina 10.15 Update  

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hkoster1
(@hkoster1)
Eminent Member
Joined: 3 years ago
 

My setup runs fine, both in passthrough mode (eGPU <> MacMini > Display) and direct mode (MacMini > eGPU > Display). Unigine Valley shows scores of 2500 and 3500, respectively. Yet, my Trainz game shows no difference between those two modes, presumably because in both cases Activity Monitor shows a maximum bandwidth of 5 Gb/s used 100%. 

Why only 5 Gb/s? The OP also shows this 5 Gb/s value.

I've tried different TB3 cables, but no difference...

 

Screenshot 2019 11 21 at 13.31.01
 Screenshot 2019 11 21 at 14.52.07
This post was modified 11 months ago

Radeon RX 5700 XT + Razer Core X + LG 23.7" 4K UltraFine + Huawei VR2 DP/USB to USB-C cable
Mac Mini 2018 always latest public macOS build

 
2017 Intel NUC7i5BNH [7th,2C,U] + GTX 1080 Ti @ 32Gbps-TB3 (Sonnet Breakaway 550) + Win10 [build link]  


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Ted Dawson
(@ted_dawson)
Active Member
Joined: 1 year ago
 

I noticed iMovie doesn’t use my egpu at all. Really lame - spend all this money and it only works on certain apps 

.  Vega 56 works “ok” on Catalina. I think in Mojave the egpu did more in iMovie 

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

.

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TheMadTurtle11
(@themadturtle11)
Active Member
Joined: 1 year ago
 

@hkoster1 I believe that's a Navi card and my understanding is that the issue only presents itself with cards using the Polaris architecture.  Someone correct me if I'm wrong.

2018 Mac mini + Sonnet 550 breakaway + Sapphire Pulse RX580


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hkoster1
(@hkoster1)
Eminent Member
Joined: 3 years ago
 

@themadturtle11

Mmm... I still have a Vega 56 card lying around. Are you suggesting that I could get higher bus speeds with that older card? Wouldn't be hard to test, so stay tuned.

Radeon RX 5700 XT + Razer Core X + LG 23.7" 4K UltraFine + Huawei VR2 DP/USB to USB-C cable
Mac Mini 2018 always latest public macOS build

 
2017 Intel NUC7i5BNH [7th,2C,U] + GTX 1080 Ti @ 32Gbps-TB3 (Sonnet Breakaway 550) + Win10 [build link]  


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itsage
(@itsage)
Illustrious Member Admin
Joined: 4 years ago
 

@hkoster1 I believe @themadturtle11 was commenting on the 2018 Mac mini issue with running Catalina with a Polaris card such as RX 580. RX 5700 XT is a Navi card and RX Vega 56 is a Vega so they don't have boot hang issue in the 2018 Mac mini. Regarding the 5 Gb Max Bandwidth/sec, we don't really know how Apple determined that number. I have tested Thunderbolt 1, 2, and 3 Macs and it's the same 5 Gb/s in Activity Monitor for the eGPU.

external graphics card builds
best laptops for external GPU
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2020 15" HP Spectre X360 [11th,4C,G] + RTX 2080 Ti @ 32Gbps-TB4 (AORUS Gaming Box) + Win10 2004 [build link]  


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hkoster1
(@hkoster1)
Eminent Member
Joined: 3 years ago
 

Thanks @itsage , I'm just trying to find out why Unigine Valley improves score/fps when using the direct eGPU > Display connection, and my Trainz game does not. The game devs claim that the CPU > eGPU bus is already saturated when using the passthrough connection (eGPU <> Mac Mini > Display), but somehow that conclusion doesn't feel right.

BTW, my Display is the LG 23.7-inch 4K UltraFine,  and in the direct connection I've used both the Moishi DP > USBC cable and the Huawei VR2 cable, both work well. 

Radeon RX 5700 XT + Razer Core X + LG 23.7" 4K UltraFine + Huawei VR2 DP/USB to USB-C cable
Mac Mini 2018 always latest public macOS build

 
2017 Intel NUC7i5BNH [7th,2C,U] + GTX 1080 Ti @ 32Gbps-TB3 (Sonnet Breakaway 550) + Win10 [build link]  


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pzy2018
(@pzy2018)
Active Member
Joined: 3 years ago
 

hi,

I am having screen freezes while using applications on the screen driven by my egpu. It happened while using Firefox and Substance Painter. Hot unplugging and replugging solves the issue for a while, till it happens again.

 Anybody else experiencing this issue? (using Catalina and a Radeon VII egpu)

2017 15" MacBook Pro, MacOS Catalina 10.15.1 (19B88), Sonnet eGFX Breakaway Box 650, Radeon VII


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Loic Bonvarlet
(@loic_bonvarlet)
New Member
Joined: 11 months ago
 

Interested in early feedback on functionality for those who upgraded to macos Catalina 10.15.2 official update ( https://support.apple.com/en-gb/HT210642) together with macbook pro and RX 5700

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

.

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Mini i5
(@mini-i5)
Honorable Member
Joined: 1 year ago
 

@loic_bonvarlet

Don’t. 

Stay on 10.15.1 for now. A couple members have already posted about issues with 10.15.2.

2018 Mac Mini i5 / 6-core 3.0-4.1 Ghz / 32GB / 256GB / Intel UHD 630 / PowerColor Gaming Station / PowerColor dual-fan RX 5700 XT / Mac OS 10.15.6 Catalina / Windows 2004 😏 / Dual LG 27" 4K displays


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rnb2
 rnb2
(@rnb2)
Eminent Member
Joined: 2 years ago
 

@loic_bonvarlet

I would stay on 10.15.1 for now - I haven't seen anybody else corroborate my issue yet, but after updating to 15.2, I can no longer boot with my eGPU attached. I have to boot with HDMI connected, then plug the eGPU in at the login screen. This also means that booting into Windows is no longer straightforward, as I can't get a boot menu with the eGPU connected, either. It appears that I'll have to shut down completely, unplug the eGPU, plug in HDMI, then turn the mini on and select my boot device, then connect the eGPU.

2018 i7 Mac mini - OWC Mercury Helios FX (Sonnet 550) - ASRock Vega 56 - BenQ SW271


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