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Nanky
(@nanky)
New Member
Joined: 4 years ago
 

Hi im trying to figure out if its feasible to have two systems share one eGPU by switching between them via a KVM Switcher (or some other switch).

 

I have a Macbook Pro and im thinking about building a render pc into my desk. It would be nice if i than could use the GPU from that system as an eGPU for my macbook if i want to.

I abandoned the idea when i got 0 help in this forum but i just came across Thunderbolt 3 KVM swtichers used to connect multiple machines to one monitor. Maybe its possible to also use it to connect one eGPU+monitor to two machines.

 

Anyone has any information or knowledge about these things?

 

Thanks for your help!

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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joevt
(@joevt)
Noble Member
Joined: 4 years ago
 

@nanky

Show a link to an example Thunderbolt 3 KVM?

If both systems can survive having an eGPU disconnected and reconnected, then they will probably work with a switch (if one exists that supports 20 Gbps per lane).

 

 

Mac mini (2018), Mac Pro (Early 2008), GA-Z170X-Gaming 7, Sapphire Pulse Radeon RX 580 8GB GDDR5, Radeon Pro W5700, Sonnet Echo Express III-D, Trebleet Thunderbolt 3 to NVMe M.2 case


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Nanky
(@nanky)
New Member
Joined: 4 years ago
 

@joevt

 

This is the one i saw https://www.kvm-switches-online.com/gud3c04.html but i think this would not work because of the lack of connections and (but that might be an error) it says that the USB-C connection has only 5Gbps (same as the USB-A).

 

Id yet have to think of a way to connect them (and even what would need to be connected were).

 

I think the connection/reconnection wont be a problem for me. In my case its more that id want to use a fixed (almost unreachable) GPU in multiple machines. Which i right now realize would probably also work if i have the connection (lets say USB-C) of the GPU as well as a port to the render machine outside of the desk so i could unplug the GPU from the PC and plug it into the Macbook.. hmmm.

 

 

 

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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joevt
(@joevt)
Noble Member
Joined: 4 years ago
 

@nanky, that appears to be a USB-C KVM switch, not Thunderbolt. It's limited to 5 Gbps for USB/5.4 Gbps two lanes for DisplayPort per lane. Thunderbolt requires 20 Gbps per lane.

It has no downstream Thunderbolt port for a Thunderbolt device like the eGPU.

 

The only Thunderbolt KVM I've ever seen is Thunderbolt 2 from IOGEAR.
https://www.amazon.com/dp/B01M74Y03E

 

Mac mini (2018), Mac Pro (Early 2008), GA-Z170X-Gaming 7, Sapphire Pulse Radeon RX 580 8GB GDDR5, Radeon Pro W5700, Sonnet Echo Express III-D, Trebleet Thunderbolt 3 to NVMe M.2 case


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