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UberNiK
(@ubernik)
Active Member
Joined: 2 months ago
 

Anyone else using the ADT to m.2 nvme having this issue?

According to GPUz, sometimes my setup is only using 2 PCIe lanes, whenever I see this, I restart my laptop and it goes back to 4x.

I am still building my physical enclosure so I haven't done any in depth testing yet. I am planning on posting my whole build as soon as I am able to post photos. 

Dell Inspiron 15 7577|dGPU GTX 1060|eGPU Custom enclosure GTX 1080


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itsage
(@itsage)
Illustrious Member Admin
Joined: 4 years ago
 

@ubernik, What does the Performance tab look like in CUDA-Z

 

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

 
2020 14" MSI Prestige 14 EVO [11th,4C,G] + RTX 3080 @ 32Gbps-TB4 (AORUS Gaming Box) + Win10 2004 [build link]  


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UberNiK
(@ubernik)
Active Member
Joined: 2 months ago
 

I have never used this app before, looks very interesting. Am i supposed to be running it under load or at ide, or does it not matter?

This export is while GPU-z is reporting 2x lanes

[spoiler title="Export from CUDA-Z"]

CUDA-Z Report
=============
Version: 0.10.251 64 bit http://cuda-z.sf.net/
OS Version: Windows x86 6.2.9200
Driver Version: 457.09
Driver Dll Version: 11.10 (27.21.14.5709)
Runtime Dll Version: 6.50

Core Information
----------------
Name: GeForce GTX 1080
Compute Capability: 6.1
Clock Rate: 1860 MHz
PCI Location: 0:61:0
Multiprocessors: 20
Threads Per Multiproc.: 2048
Warp Size: 32
Regs Per Block: 65536
Threads Per Block: 1024
Threads Dimensions: 1024 x 1024 x 64
Grid Dimensions: 2147483647 x 65535 x 65535
Watchdog Enabled: Yes
Integrated GPU: No
Concurrent Kernels: Yes
Compute Mode: Default
Stream Priorities: Yes

Memory Information
------------------
Total Global: 8192 MiB
Bus Width: 256 bits
Clock Rate: 5005 MHz
Error Correction: No
L2 Cache Size: 48 KiB
Shared Per Block: 48 KiB
Pitch: 2048 MiB
Total Constant: 64 KiB
Texture Alignment: 512 B
Texture 1D Size: 131072
Texture 2D Size: 131072 x 65536
Texture 3D Size: 16384 x 16384 x 16384
GPU Overlap: Yes
Map Host Memory: Yes
Unified Addressing: Yes
Async Engine: Yes, Unidirectional

Performance Information
-----------------------
Memory Copy
Host Pinned to Device: 1450.45 MiB/s
Host Pageable to Device: 1391.08 MiB/s
Device to Host Pinned: 1519.54 MiB/s
Device to Host Pageable: 1416.59 MiB/s
Device to Device: 95.6594 GiB/s
GPU Core Performance
Single-precision Float: 9459.41 Gflop/s
Double-precision Float: 319.279 Gflop/s
64-bit Integer: 719.114 Giop/s
32-bit Integer: 3309.9 Giop/s
24-bit Integer: 2500.78 Giop/s

Generated: Fri Nov 13 23:48:39 2020[/spoiler]

This post was modified 2 months ago

Dell Inspiron 15 7577|dGPU GTX 1060|eGPU Custom enclosure GTX 1080


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UberNiK
(@ubernik)
Active Member
Joined: 2 months ago
 

I found the post here on egpu.io that gives the examples of what speeds each type of enclosure should be seeing. I see mine is exactly half what it should be. I restarted my laptop about 10 times today and could not get it to 4x lanes. 

 

I'm going to check bios settings tomorrow, and hwinfo.

Dell Inspiron 15 7577|dGPU GTX 1060|eGPU Custom enclosure GTX 1080


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UberNiK
(@ubernik)
Active Member
Joined: 2 months ago
 

Does anyone else out there have any suggestions?

 

I have tried almost everything I could think of. There is nothing else sharing that bus in hwinfo except the nvidia sound, which I even tried disabling. I have went through all of the BIOS options, the only one I haven't changed yet is changing from "RAID on" to AHCI. I also haven't tried different drivers or clean nvidia driver installation yet. I am going to try those tonight.

I also tried all of the switches and jumpers on the ADT adapter to no avail. It is just completely random. Last night when I got home from work it booted right up into 4x. After I was done playing I shut it down, didn't move anything a millimeter. I booted it up today and despite restarting probably 30 times I can't get it into 4x mode.

 

Does anyone know when exactly the system determines whether to use 2x or 4x lanes? Is that during POST or does the OS handle that? GPUz and HWinfo both report the 1080 is capable of up to 16x but that is currently in 2x mode, cuda-z is also reporting exactly half the transfer rate that I should be seeing with 4x. So I know it really is in 2x.

 

I am getting very disheartened, I have put about 500 dollars into this thing so far, not too mention about 15 hours of CAD design into the enclosure. If I'm stuck only using 2 lanes, then I could have just bought a thunderbolt 3 enclosure and saved some time and money.   🙁

Dell Inspiron 15 7577|dGPU GTX 1060|eGPU Custom enclosure GTX 1080


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ronald_loulan
(@ronald_loulan)
New Member
Joined: 2 months ago
 

@ubernik, did you try to benchmark and see if it jump from 2x to 4x?
Or anything related to power saving??

 

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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nando4
(@nando4)
Noble Member Admin
Joined: 4 years ago
 

Suggest clean all PCIe contacts with isopropyl alcohol to ensure electrical signal integrity and test again:

- the ADT-Link R43SG slot

- the video card PCIe pins

If the problem continues consider tesing a different brand video card to see if the problem is isolated to that GTX 1080 you've been using

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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UberNiK
(@ubernik)
Active Member
Joined: 2 months ago
 

I have tried putting a load on the card, the only that would change in that instance is pcie 1.0 to 3.0.

 

I am thinking that Nando is on to something, due to the random nature of the issue.

 

The last two times I have hooked everything up for testing its been using all four lanes. I had reseated the card previously, but more recently I decided to leave the nuts off of the mounting bracket. It looks like with both of the tall studs tightened down, the card is held at an angle. I think they may have used a cheaper PCIE slot so maybe the pins werent making contact. I am not 100% sure yet, but I'm convinced enough to move forward with the project. 

 

I just bought a 30 something inch ultra-wide LG, my god these things are amazing. Playing on that laptop screen sucked. I am designing the desk in CAD so that the GPU enclosure will be part of it, with just the cable coming out of the surface to plug into the laptop which will be mounted at a nice angle for a secondary display.

 

How can I add photos of what I have so far?

Dell Inspiron 15 7577|dGPU GTX 1060|eGPU Custom enclosure GTX 1080


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UberNiK
(@ubernik)
Active Member
Joined: 2 months ago
 

Pictures! The little buttons just popped up. I have a lot more done on the CAD model now but you can see where I'm going with it.

 

 

 

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Dell Inspiron 15 7577|dGPU GTX 1060|eGPU Custom enclosure GTX 1080


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