How to set an egpu on imac 5k 2017?
 
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How to set an egpu on imac 5k 2017?  

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cuppino
(@cuppino)
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Joined: 3 years ago
 

Today I started the razer core x return.
Before returning the vega 64, I wanted advice.
According to you with Sonnet eGFX Breakaway box 650 could I have better results or better give up?

iMac 27" 5k 2019 (i9 9900k 3,6ghz, 40gb ram ddr4 2666 mhz, ssd 1tb, dgpu Radeon pro vega 48 8gb), Egpu: Razer Core X with ZOTAC GAMING GeForce RTX 3090 Trinity
Osx 10.15.7
Windows 10 pro 2004 - Bootcamp


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Jyin
 Jyin
(@jyin)
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Joined: 4 years ago
 

At this point, your issues seems to be specific to a single game.
It may be badly written, or configured.
Or it simply isn’t compatible with Vega.

Vega’s strength is that it works well with OS X, and works ok in Bootcamp.
If you only care about single game, you are better off getting something that game supports well.
I would suggest getting a console like ps4, if your game is available there. Or build an gaming PC.
You may also wat to try nvidia card.

J

2017 27" iMac 5K (RP580) [7th,4C,K] + RTX 2080 Ti @ 32Gbps-TB3 (Sonnet Breakaway 550) + Win10 [build link]  

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cuppino
(@cuppino)
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Joined: 3 years ago
 

I was thinking of keeping the razer core x a little longer and trying a nvidia gpu. It seems like everything should be simpler with the nvidia gpu. I am aware that I will not be able to use it in mac os, but only in bootcamp with windows 10.
I saw some prices and the 1080 ti and the 2080 rtx cost too much.
I was thinking of taking a 2070 rtx.

iMac 27" 5k 2019 (i9 9900k 3,6ghz, 40gb ram ddr4 2666 mhz, ssd 1tb, dgpu Radeon pro vega 48 8gb), Egpu: Razer Core X with ZOTAC GAMING GeForce RTX 3090 Trinity
Osx 10.15.7
Windows 10 pro 2004 - Bootcamp


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cuppino
(@cuppino)
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Joined: 3 years ago
 

for now I kept the razer core x. I returned the vega 64 and ordered a nvidia evga rtx 2070 xc ultra.
As soon as I arrive, I will rehearse and let you know.
If even with an nvidia card it will not work I will give up. But at least I know I've tried all the possibilities without regrets.
Being two different cards the radeon pro integrated in the mac and nvidia, I do not have to delete the drivers of the radeon pro to use the 2070?

iMac 27" 5k 2019 (i9 9900k 3,6ghz, 40gb ram ddr4 2666 mhz, ssd 1tb, dgpu Radeon pro vega 48 8gb), Egpu: Razer Core X with ZOTAC GAMING GeForce RTX 3090 Trinity
Osx 10.15.7
Windows 10 pro 2004 - Bootcamp


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Jyin
 Jyin
(@jyin)
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Joined: 4 years ago
 

I just recently added a RTX 2080 ti to my iMac
I was not able to get internal display to work at all.
If I disabled the dGPU, a Windows logo gets stuck on it.
If I enabled it, and install the driver for RP580, I get black screen.

I was told that if I hot plug the TB3 cable while the Windows is booting, I will have better luck.
I didn’t bother with that, since cables are not in easy reach for me to do that every boot.

J

2017 27" iMac 5K (RP580) [7th,4C,K] + RTX 2080 Ti @ 32Gbps-TB3 (Sonnet Breakaway 550) + Win10 [build link]  

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cuppino
(@cuppino)
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Joined: 3 years ago
 

I did not understand ... but did the 2080 work for you or not?
I hope to get at least this result: egpu connected no screen imac but external screen ok.
Egpu disconnected, imac works normally.
If it worked what did you do?

iMac 27" 5k 2019 (i9 9900k 3,6ghz, 40gb ram ddr4 2666 mhz, ssd 1tb, dgpu Radeon pro vega 48 8gb), Egpu: Razer Core X with ZOTAC GAMING GeForce RTX 3090 Trinity
Osx 10.15.7
Windows 10 pro 2004 - Bootcamp


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OliverB
(@oliverb)
Noble Member
Joined: 3 years ago
 
Posted by: Jyin

I just recently added a RTX 2080 ti to my iMac
I was not able to get internal display to work at all.
If I disabled the dGPU, a Windows logo gets stuck on it.
If I enabled it, and install the driver for RP580, I get black screen.

I was told that if I hot plug the TB3 cable while the Windows is booting, I will have better luck.
I didn’t bother with that, since cables are not in easy reach for me to do that every boot.

J

It's true with the hot-plugging, but you probably have set the gpuswitch to 0 under macosx , if not... yeah, it's difficult. The only thing that surely works, is an AMD card with MacOSX. The rest is not guaranteed and not supported by anyone. Let's see.

- nVidia cards under macosx? Mostly don't work, won't work under mojave, RTX cards don't work under anything from Apple. nVidia web drivers are sub-optimal at best.
- nVidia cards under bootcamp? External monitor is ok, but internal monitor? Very complicated.
-AMD cards under bootcamp? Forget about your internal monitor accelerating anything. Forever.
-AMD cards under macosx? Fine.

2018 15" MBP & 2015 13" MBP connected to RTX2080Ti GTX1080Ti GTX1080 Vega56 RX580 R9-290 GTX680

 
2018 15" MacBook Pro (RP560X) [8th,6C,H] + RX 5700 XT @ 32Gbps-TB3 (ASUS XG Station Pro) + Win10 & macOS 10.15.4 // Navi vs Radeon VII vs GTX 1080 Ti [build link]  


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Jyin
 Jyin
(@jyin)
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Joined: 4 years ago
 
Posted by: cuppino

I did not understand ... but did the 2080 work for you or not?
I hope to get at least this result: egpu connected no screen imac but external screen ok.
Egpu disconnected, imac works normally.
If it worked what did you do?

Yeah, the RTX 2080 ti works with 2017 iMac 27’ 5k.
Provided that:

1) You have big enough eGPU to house it.
2) ... and big enough to cool it.
3) ... and have big enough PSU. (I didn’t mess around. I simply fed mine 850W).
4) ... and have external monitor(s). 
5) ... and you can live with none-functional internal display (or willing to try the hot plugging).
6) ... and have some time to kill while you run multiple sessions of DDU/install.
7) ... and willing to give up on OS X side of eGPU experience (unless of course you have 2nd AMD eGPU). 

Check out this post if you are interested in what I did.

J

2017 27" iMac 5K (RP580) [7th,4C,K] + RTX 2080 Ti @ 32Gbps-TB3 (Sonnet Breakaway 550) + Win10 [build link]  

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cuppino
(@cuppino)
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Joined: 3 years ago
 

today I got the 2070 and ... it works great !!!
It was very easy to set the card in bootcamp.
I started windows (I use the version 1803 with all the updates made), I turned on the core x, after windows recognized the card, I installed the official nvidia drivers and everything works without problems.
If I use egpu I can not use the integrated monitor.
If I turn off and on again the mac with the egpu turned off everything works normally.
I did not have to delete the radeon drivers.
I'm really very happy.

iMac 27" 5k 2019 (i9 9900k 3,6ghz, 40gb ram ddr4 2666 mhz, ssd 1tb, dgpu Radeon pro vega 48 8gb), Egpu: Razer Core X with ZOTAC GAMING GeForce RTX 3090 Trinity
Osx 10.15.7
Windows 10 pro 2004 - Bootcamp


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Jyin
 Jyin
(@jyin)
Estimable Member
Joined: 4 years ago
 

Have you done load testing yet?
I would be curious to see the temperature at max load.

I will update with my result.

MSI Afterburner works well to record the temperature change during the test.

J

2017 27" iMac 5K (RP580) [7th,4C,K] + RTX 2080 Ti @ 32Gbps-TB3 (Sonnet Breakaway 550) + Win10 [build link]  

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