2017 13" Dell Latitude 7380 [7th,2C,U] + GTX 1660 @ 16Gbps-TB3 (ADT-Link R43SG-T...
 
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2017 13" Dell Latitude 7380 [7th,2C,U] + GTX 1660 @ 16Gbps-TB3 (ADT-Link R43SG-TB3) + Win10  

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Wzza
 Wzza
(@wzza)
Active Member
Joined: 5 months ago
 

System specs

  • 13" Dell Latitude 7380 (FHD display)
  • Intel i7-7600U
  • Intel HD 620
  • Windows 10 Pro (1909)

 

eGPU hardware

 

Hardware pictures

 

Benchmarks (external display)

 

Comments

Installation was straightforward and pretty much plug and play. Hot-plugging or booting with the rig hooked up both work. However I don't know what to think about the low host-to-device bandwidth I am getting. My TB3 controller is supposed to have 4 PCIe lanes but I did read about downscaled performance with Kaby/Sky Lake U processors (see here and here). Is this what I am experiencing? Still my bandwidth seems very low...

Below are screenshots from HWINFO64 which seem to show that my TB3 controller has indeed 4 lanes but that only 2 are used. Any thoughts?

 

Aside from the benchmarking, I am rather satisfied with in-game performance. Then again, I am comparing with the iGPU...

This topic was modified 4 months ago
2017 13" Dell Latitude 7380 [7th,2C,U] + GTX 1660 @ 16Gbps-TB3 (ADT-Link R43SG-TB3) + Win10 [build link]  

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itsage
(@itsage)
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Joined: 4 years ago
 

@wzza, It's possible Dell set the laptop to OPI 2GT/s mode rather than 4GT/s. Can you identify the internal NVMe M.2 drive and run a benchmark on it?

 

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2013 Mac Pro (FP D500 x2) [3rd,12C,E] + RX 5700 XT @ 16Gbps-TB2>TB3 (Mantiz Saturn Pro) + macOS 11 [build link]  


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Wzza
 Wzza
(@wzza)
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Joined: 5 months ago
 

@itsage

Thanks for your reply. The thing is I know my internal NVMe M.2 port runs with only two PCIe lanes. See attached screens. I can still run a benchmark though. What tool would you recommend? Or did you mean running a benchmark of my SSD through the NVMe-to-TB3 ADT-Link enclosure?

2017 13" Dell Latitude 7380 [7th,2C,U] + GTX 1660 @ 16Gbps-TB3 (ADT-Link R43SG-TB3) + Win10 [build link]  

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itsage
(@itsage)
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Joined: 4 years ago
 

@wzza, Sorry to see it's a x2 PCIe connection for the M.2 slot. I don't really know of a different test to confirm whether a laptop is set at OPI 2GT/s. I recognized those speeds in your CUDA-Z Performance tab as something I've seen related to 2GT/s.

 

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

 
2013 Mac Pro (FP D500 x2) [3rd,12C,E] + RX 5700 XT @ 16Gbps-TB2>TB3 (Mantiz Saturn Pro) + macOS 11 [build link]  


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joevt
(@joevt)
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If it's not OPI then it could be Thunderbolt lanes (but I think all new Dells use 4 lanes) or it could be Thunderbolt 2 link speed instead of Thunderbolt 3 link speed (check the Thunderbolt 3 cable - is it a Thunderbolt 3 cable or a USB-C cable?).

 

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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Wzza
 Wzza
(@wzza)
Active Member
Joined: 5 months ago
 

@itsage

The speeds I'm getting seem even lower than what was reported for 4 lanes with OPI 2GT/s mode.

@joevt

I know for a fact that the laptop has 4 TB PCIe lanes, which is confirmed by the reading from hwinfo (that also shows that only two are used). Am I right in believing that if the OPI 2GT/s mode were set, all 4 PCIe lanes would still be used? I'm using the TB3 cable that came with the ADT-Link device and I don't have a spare to try...

On thing I will do later is have the eGPU plugged to my internal NVMe M.2 port and my internal SSD in the TB3 enclosure, and benchmark both.

This post was modified 4 months ago
2017 13" Dell Latitude 7380 [7th,2C,U] + GTX 1660 @ 16Gbps-TB3 (ADT-Link R43SG-TB3) + Win10 [build link]  

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nando4
(@nando4)
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Posted by: @wzza

I'm using the TB3 cable that came with the ADT-Link device and I don't have a spare to try...

 

Does your Thunderbolt cable have a letter "3" printed on the connector to indicate it's a TB3 40Gbps cable? Here's the blurb from the builds page on the requirements to get full TB3 performance:

32Gbps-TB3: to achieve ~2254MiB/s H2D (Nvidia) or ~2550MB/s (AMD) requires the correct TB3 enclosure firmware, a 40Gbps TB3 cable , NO additional active TB3 enclosure ports and a x4 3.0 host PCIe port (not x4 2.0). U-CPU systems must be in OPI 4GT/s. Macbooks with Nvidia eGPUs must not boot using apple_set_os.efi. FYI: Intel throttles 32Gbps-TB3 to 22Gbps which benchmarks as 20.40Gbps (AMD) or 18.91Gbps (Nvidia) in the important H2D direction

eGPU Setup 1.35    •    eGPU Port Bandwidth Reference Table

 
2015 15" Dell Precision 7510 (Q M1000M) [6th,4C,H] + GTX 1080 Ti @32Gbps-M2 (ADT-Link R43SG) + Win10 1803 [build link]  


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Wzza
 Wzza
(@wzza)
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Joined: 5 months ago
 

@nando4 Yes it does. It is definitely a TB3 cable, the question is 'is if faulty?' It would say unlikely as it is new but I guess you never know... Would be an easy fix hehe.

Apart from the OPI mode which I can't check I'm pretty sure I meet all the requirements to get max bandwidth. I'll let you guys know about my future investigations (see my post above).

2017 13" Dell Latitude 7380 [7th,2C,U] + GTX 1660 @ 16Gbps-TB3 (ADT-Link R43SG-TB3) + Win10 [build link]  

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Wzza
 Wzza
(@wzza)
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Alright so here's what I did:

 1) Took out my internal NVMe SSD and hooked it up through the NVMe-to-TB3 ADT-Link enclosure

M.2 NVMe TB3
M2 as ssd bench PNY CS3030 1TB S 10.06.2020 20 24 38
TB3 as ssd bench PNY CS3030 1TB S 10.06.2020 20 24 38

2) Hooked the eGPU (R43SG) directly to the M.2 NVMe port

M.2 NVMe TB3 
CUDAZ m2
CUDAZ
heaven m2
heaven

 

So I'm getting better performance using the M.2 port. Does that make sense given the fact that, on paper, it's 2 lanes (M.2) vs 4 lanes (TB3) both running with the same OPI speed?

EDIT: Found this build with a Latitude 7480 (hardware should be almost identical to the 7380) and 6600U. The reported bandwidth looks like 4 lanes in OPI 4GT/s...

This post was modified 4 months ago
2017 13" Dell Latitude 7380 [7th,2C,U] + GTX 1660 @ 16Gbps-TB3 (ADT-Link R43SG-TB3) + Win10 [build link]  

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