eGPU and external SSD (Windows 10 Boot Camp)  

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FustyFred
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January 9, 2019 9:51 pm  

What are the limitations -- if any -- to running both an eGPU and external Windows Boot Camp on a MacBook Pro? Windows 10 Boot Camp is on a fast external SSD (G-Drive external SSD USB 3.1 Gen 2) and is plenty fast enough. What I'm wondering is, will I bottleneck the Thunderbolt controller by running both the eGPU and Windows 10 SSD? I know you have to disable the one side of the MacBook Pro so Windows can allocate enough resources to the eGPU... so I'm wondering how that affects an external SSD running Windows.

There's not enough room on the internal drive for Windows 10 and Games, so external SSD is my only option.

Thanks for your expertise guys!

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Apple 2016 15" MacBook Pro | LG 27UK600-W 27" 4k IPS Monitor | Logitech G512 Mechanical Keyboard | Logitech G600 Mouse | G-Drive USB 4TB 7,200 RPM External Drive | G-Drive mobile SSD 500 GB External Drive | Focusrite 2i4 2nd gen USB Audio Interface | Alesis M1 Active Mk2 Studio Monitors


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theitsage
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January 10, 2019 1:33 am  

@fustyfred Which MacBook Pro do you use? Depending on the model and eGPU, you may not have to disable PCI controller/root port.

Best ultrabooks for eGPU use

eGPU enclosure buying guide

94 external GPU build guides


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FustyFred
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January 10, 2019 1:34 am  

It's the 2016 15" which I've unfortunately read requires you to.

***edit*** regarding overwhelming the bandwidth of the ports... can anyone answer my original question?

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Apple 2016 15" MacBook Pro | LG 27UK600-W 27" 4k IPS Monitor | Logitech G512 Mechanical Keyboard | Logitech G600 Mouse | G-Drive USB 4TB 7,200 RPM External Drive | G-Drive mobile SSD 500 GB External Drive | Focusrite 2i4 2nd gen USB Audio Interface | Alesis M1 Active Mk2 Studio Monitors


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theitsage
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January 10, 2019 1:38 am  

Each Thunderbolt 3 controller hosts two TB3 ports and can handle up to 40Gbps. Intel caps TB3 enclosure bandwidth at 22Gbps so there's room for an external 10Gbps SSD on the second port.

Best ultrabooks for eGPU use

eGPU enclosure buying guide

94 external GPU build guides


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FustyFred
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January 10, 2019 1:43 am  

Ok, that's good to hear. My G-Drive mobile SSD is only capable transfer rates up to 560 MB/s so 10 Gb/s should be more than enough. Thanks for the info!

Apple 2016 15" MacBook Pro | LG 27UK600-W 27" 4k IPS Monitor | Logitech G512 Mechanical Keyboard | Logitech G600 Mouse | G-Drive USB 4TB 7,200 RPM External Drive | G-Drive mobile SSD 500 GB External Drive | Focusrite 2i4 2nd gen USB Audio Interface | Alesis M1 Active Mk2 Studio Monitors


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mac_editor
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January 10, 2019 3:56 am  

@fustyfred you could keep only your game library on the external SSD - this is how I do it. IIRC Windows on external SSDs have trouble updating, etc. (though I suppose that’s a good thing haha).

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theitsage
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January 11, 2019 8:51 pm  

I'd second what @mac_editor recommended. I have always partitioned 50GB for Windows in Boot Camp Assistant then connect an external SSD that contains my Steam game library. This external SSD works with different Windows 10 machines too. It's more reliable this way in my observation.

Best ultrabooks for eGPU use

eGPU enclosure buying guide

94 external GPU build guides


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FustyFred
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January 11, 2019 11:52 pm  
Posted by: theitsage

I'd second what @mac_editor recommended. I have always partitioned 50GB for Windows in Boot Camp Assistant then connect an external SSD that contains my Steam game library. This external SSD works with different Windows 10 machines too. It's more reliable this way in my observation.

Thanks, I'm going to stick with it the way it is and see how things go. I don't really have the space to spare, it's a 256GB internal.

Apple 2016 15" MacBook Pro | LG 27UK600-W 27" 4k IPS Monitor | Logitech G512 Mechanical Keyboard | Logitech G600 Mouse | G-Drive USB 4TB 7,200 RPM External Drive | G-Drive mobile SSD 500 GB External Drive | Focusrite 2i4 2nd gen USB Audio Interface | Alesis M1 Active Mk2 Studio Monitors


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