iMac Pro Vega 56 vs eGPU 6800XT worth it?
 
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iMac Pro Vega 56 vs eGPU 6800XT worth it?  

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HetzlTV
(@hetzltv)
Active Member
Joined: 10 months ago
 

Hi guys,

I am pretty curious about if the RX  6800XT  eGPU will outperform the internal  Vega 56  of the  iMac Pro ? BUT WITHOUT using an additional display!!! As I intend to upgrade it if its worth the boost. Most of the time I am doin' Video Editing and in MacOS gaming like ESO or WoW in 2k and I would like an upgrade to 4k, so I do not plan to use a bootcamp setup just MacOS. P.S.: Im am aware of the fact that MacOS currently does not support plug and play for the latest GPUs from AMD!

Okay maybe I need to specify what I want to know! is the eGPU differently managed under MacOS then under Windows Bootcamp? I mean under Windows Bootcamp you need an additional display otherwise the eGPU looses between 50 and 70% of its power.

So for an example will a current 5700XT eGPU connected via Thunderbolt 3, no other device connected via thunderbolt - under MacOS deliver better performance then my Vega 56? As it clearly will not under Windows without using an external (additional monitor/display)

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

@hetzltv, The idea for eGPU loopback acceleration is the same in both macOS and Windows. The eGPU would handle the work load then transfer it back to the iGPU/dGPU to display onto the internal screen. Computing tasks typical have less performance loss vs gaming tasks through the Thunderbolt interface. Ultimately it's down to eGPU support by the app/game. If they are well optimized to handle eGPU, the RX 6800 XT eGPU should be able to provide a boost over your Vega 56 dGPU. Less heat for the iMac Pro's cooling system also helps the computer runs better.

 

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2021 15" ASUS TUF Dash F15 [11th,4C,H] + RTX 3080 @ 32Gbps-TB4 (AORUS Gaming Box) + Win10 2004 // my 3rd RTX 3080 build [build link]  


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HetzlTV
(@hetzltv)
Active Member
Joined: 10 months ago
 

Great, thanks for your response. I decided to take the 6900XT with the Mantiz Saturn Pro V2. The 6900XT is also faster compared to the 6800XT. If the performance loss is too big for my taste I will get an additional display. Hopefully Apple will support this generation of GPUs for eGPU.

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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