Dell USB 3.1 Gen 2 claimed to support 40GPS Thunderbolt 3
 

Dell USB 3.1 Gen 2 claimed to support 40GPS Thunderbolt 3  

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(@willstewart)
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Joined: 2 months ago
 

One Dell G5 15 laptop with i7-9750H and RTX-2060 I am looking at has the following claim;

"1x Thunderbolt™ 3 Port (USB 3.1 Gen 2 Type-C with Support for 40 Gbps Thunderbolt and Display Port)"

Is this something that can support an eGPU? I'm not concerned about power, wake-up, etc, just the ability to enable an eGPU for deep learning purposes.

 

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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joevt
(@joevt)
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Joined: 2 years ago
 

@willstewart

Thunderbolt 3 supports one of the following (depends on what is connected):
1) up to 8 lanes DisplayPort tunnelling + PCIe tunnelling up to 22 Gbps or whatever is left over of the 40 Gbps after DisplayPort takes its portion.
2) up to 2 lanes of DisplayPort + USB 3.1 Gen 2 10 Gbps + USB 2.0 480 Mb/s
3) up to 4 lanes of DisplayPort + USB 2.0 480 Mb/s

DisplayPort 1.2 for Alpine Ridge
DisplayPort 1.4 for Titan Ridge

#2 and #3 are just USB-C with DisplayPort alt mode. It can't be called Thunderbolt if it doesn't support #1.

eGPUs connect a GPU via Thunderbolt PCIe tunnelling to the computer. An eGPU should be usable with any computer that has a Thunderbolt port but some PC manufactures won't support an eGPU with some laptops/motherboards (laziness? or they don't want to deal with the support issues because of crappy drivers from Microsoft, AMD, or Nvidia that they can't control?).

Mac mini (2018), Mac Pro (Early 2008), MacBook Pro (Retina, 15-inch, Mid 2015), GA-Z170X-Gaming 7, Sapphire Pulse Radeon RX 580 8GB GDDR5, Sonnet Echo Express III-D, Trebleet Thunderbolt 3 to NVMe M.2 case


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(@willstewart)
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Joined: 2 months ago
 

Very helpful, thanks @joevt

Is there any way I can tell (or find out) if this Dell is a #1, #2, or #3?

https://www.costco.com/.product.1373108.html

This post was modified 2 months ago

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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itsage
(@itsage)
Illustrious Member Admin
Joined: 3 years ago
 

@willstewart The G5590-7612BLK-PUS specs list 1x Thunderbolt 3 port so it should be able to host Thunderbolt 3 devices (eGPU included).

 

external graphics card builds
best laptops for external GPU
eGPU enclosure buyer's guide


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joevt
(@joevt)
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Joined: 2 years ago
 

@willstewart

What itsage said. I said it can't be called Thunderbolt unless it does #1. They call it Thunderbolt. Therefore the answer is #1.

Mac mini (2018), Mac Pro (Early 2008), MacBook Pro (Retina, 15-inch, Mid 2015), GA-Z170X-Gaming 7, Sapphire Pulse Radeon RX 580 8GB GDDR5, Sonnet Echo Express III-D, Trebleet Thunderbolt 3 to NVMe M.2 case


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(@willstewart)
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Joined: 2 months ago
 

@itsage @joevt

My concern is that in the main text of the overview, after "1 x Thunderbolt" they append the qualifier "(USB 3.1 Gen 2 Type-C with Support for 40 Gbps Thunderbolt and Display Port)". Am I being too cautious?

 

 

This post was modified 1 month ago

Pending: Add my system information and expected eGPU configuration to my signature to give context to my posts


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joevt
(@joevt)
Prominent Member
Joined: 2 years ago
 

@willstewart

It does #1 (Thunderbolt 3), so it means it also does #2 (USB 3.1 Gen 2) and #3 (DisplayPort).

I guess they start with USB 3.1 Gen 2 because USB is the main mode for a USB-C port. Thunderbolt and DisplayPort are alt modes of USB-C. The USB-C port and the USB-C device negotiate what mode they are going to use. You can look up USB, USB-C, DisplayPort, and Thunderbolt at wikipedia.org

 

Mac mini (2018), Mac Pro (Early 2008), MacBook Pro (Retina, 15-inch, Mid 2015), GA-Z170X-Gaming 7, Sapphire Pulse Radeon RX 580 8GB GDDR5, Sonnet Echo Express III-D, Trebleet Thunderbolt 3 to NVMe M.2 case


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