Node Lite / Pro: does the downstream port function as USB C not TB3?
 
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Node Lite / Pro: does the downstream port function as USB C not TB3?  

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chx
 chx
(@chx)
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Joined: 4 years ago
 

Could you, say, plug a phone into it for data transfer? A cheap USB C mini dock?

Lenovo ThinkPad 25 -- GALAX SNPR TB3 1060 -- Lenovo Graphics Dock -- Benq BL2411PT - - two PackedPixels - Dasung not-eReader backer


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joevt
(@joevt)
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Joined: 4 years ago
 

They have two Thunderbolt 3 ports. Their features lists say

  • 2nd Thunderbolt port supports Thunderbolt 3, USB 3.1, and DisplayPort devices

I don't think there's any Thunderbolt 3 port that can't be used with display adapters, USB devices, or docks. USB docks use two lanes for USB and two lanes for DisplayPort (4K 30 Hz). USB-C with DisplayPort alt mode adapters use all 4 lanes for DisplayPort (4K 60 Hz).

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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MarkieG84
(@markieg84)
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Yes you can.  What I wonder is if there's any difference between doing that and using a second port of the computer that's on the same thunderbolt controller.

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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chx
 chx
(@chx)
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Joined: 4 years ago
 

Any source to this? Like personal experience? I know it should but the strange world of USB C breaks everything and written specs sometimes turns out to be ... not 100% accurate to say the very least.

Lenovo ThinkPad 25 -- GALAX SNPR TB3 1060 -- Lenovo Graphics Dock -- Benq BL2411PT - - two PackedPixels - Dasung not-eReader backer


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MarkieG84
(@markieg84)
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I have used my Node Pro with a usb 3.1 gen 2 ssd plugged into the second port and the ssd (evo 850) benchmarks as expected.  The thing is I'm not sure if it is stealing bandwidth from the GPU more than if it were using the second port of the computer on the same TB controller.  If it is, then it is not ideal at all.  I have noticed first hand that my Breakaway Box performs much more stable under MacOS than the Node Pro with or without anything in the second port.

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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chx
 chx
(@chx)
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Joined: 4 years ago
 

Thanks! That's the experience I was looking for. This means the best single cable docking for most purposes currently is the Node Pro plus a cheap USB C to USB A gadget downstream. Or snagging a cheaper Core 2 but the chances of that.

Lenovo ThinkPad 25 -- GALAX SNPR TB3 1060 -- Lenovo Graphics Dock -- Benq BL2411PT - - two PackedPixels - Dasung not-eReader backer


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joevt
(@joevt)
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Posted by: MarkieG84

I have used my Node Pro with a usb 3.1 gen 2 ssd plugged into the second port and the ssd (evo 850) benchmarks as expected.  The thing is I'm not sure if it is stealing bandwidth from the GPU more than if it were using the second port of the computer on the same TB controller.  If it is, then it is not ideal at all.  I have noticed first hand that my Breakaway Box performs much more stable under MacOS than the Node Pro with or without anything in the second port.

Devices take bandwidth, but only when you're using them. You are not writing to the SSD all the time. Usually you are reading from an SSD. A computer game does not send new textures to the GPU all the time. Things are cached. Usually you are writing to a GPU. Reading from a device does not use the same bandwidth as writing to a device. You'll get slightly better (maybe not even measurable?) performance using different Thunderbolt 3 ports or even Thunderbolt 3 controllers.

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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