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Stability problem with EXP GDC Beast V9.0B M.2 and dual HDMI
 

Stability problem with EXP GDC Beast V9.0B M.2 and dual HDMI  

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Iamzero456
(@iamzero456)
New Member
Joined: 2 years ago
 

Hi folks,

A few weeks ago I received my beast with M.2 for an exernal GPU setup. I paid about 90 euros for it and I was very excited to give it a try. I have began testing until deep in the nights to get things working, but overall I'm not that satisfied with the results on my laptop

https://nl.aliexpress.com/item/M-2-M-PCI-E-Version-PCIe-PCI-E-V9-5-EXP-GDC-Laptop-Docking-Station/32806527691.html

Hosts:
Laptop MSI GL62M 7REX-1252CN (i7 7700HQ, 8GB, 1050ti 4GB, 840 pro 256GB sata ssd)
Intel NUC Kit NUC7i3BNH (i3-7100U, 8GB, MX500 256GB sata ssd)

Videocards: 
Asus RX480 DualFan 4GB
Gainward 750ti 2GB
Zotac Mini GTX 1080 8GB

Power Supplies:
Dell 220W Adapter 8pin
Bequiet 450W ATX PSU

Software:
Windows 10 Pro 64bit
Heaven Benchmark
Passmark3d
Witcher 3
Hitman Absolution
Cuda-Z, GPU-Z

My goal is to use the 1080 as an EGPU to get high FPS in games with my MSI laptop. I think I have tried all the combinations of other video-cards and power supplies with my laptop and the Beasts, but all result in a very unstable, unexpected low frame-rate. It's fluctuating a lot, like every second from 5 fps to 90 fps in Heaven Benchmark (extreme) for example. 

I solved the Error 43 bug, I tried different Nvidia/ATI driver versions, I tried disabling internal GPU/intel, internal/external screen, rebooting etc...

It wasn't until I saw this topic...

https://egpu.io/forums/expresscard-mpcie-m-2-adapters/exp-gdc-beast-v9-0b-just-arrived/

... that I decided to buy a NUC to test if the problem is in my laptop or the beast. Again I tried a lot of combinations (well, mostly the gtx 1080) and it worked flawlessly out of the box! Stable frame-rate and even while the NUC only has an i3 processor, it performs way better than my laptop. No fluctuating frame-rates and amazing images in games or benchmarks. Problem is: I can't/won't keep the NUC and much prefer my brand-new laptop. 

Questions: Do I forget something here? Do I have any other options left to try? How do I fix the fluctuating performance?

The seller can't help me, so maybe one of you guys can. 

Regards,

iamzero456

 

 

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


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seggybop
(@seggybop)
Active Member
Joined: 2 years ago
 

Check the Windows Event Logger for WHEA PCIe errors. The signal quality with my Beast 9.0b was horrible, generating thousands of errors per second. If you're getting the same thing, it's because of the adapter.

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


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Iamzero456
(@iamzero456)
New Member
Joined: 2 years ago
 
Posted by: seggybop

Check the Windows Event Logger for WHEA PCIe errors. The signal quality with my Beast 9.0b was horrible, generating thousands of errors per second. If you're getting the same thing, it's because of the adapter.

The fact that the Beast works excellent with my NUC as far as I can see, but just horrible with my laptop proves that the Beast itself is fine, right? As well as my PSU or cable?

I will check the logs this weekend but I don't think the Beast itself is faulty.

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


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seggybop
(@seggybop)
Active Member
Joined: 2 years ago
 

Some signal sources are stronger than others (while still being within spec for PCIe), so it's still possible for those devices to work OK despite attenuation. It's likely your laptop's signaling is fine (as in, within the nominal range for internal M.2 devices) but not strong enough to overcome the losses caused by the Beast adapter. 

You might want to try the R42S series adapter, which has way better signal quality. The cases I tried where the Beast 9.0b failed all worked perfectly with the R42SF.

 

 

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


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nando4
(@nando4)
Noble Member Admin
Joined: 3 years ago
 

Per seggybop’s post, we have one reported very good result with the aforementioned ADT-Link R43xx M.2 eGPU adapter: https://egpu.io/forums/builds/2017-15-dell-inspiron-7567-gtx980ti32gbps-m2-adt-r43sl-win10-hunew/ .

From the mPCIe/EC discussion, we’ve been able to identify the EXP GDC has poor EMI insulation. If you’ve acquired the adapter and cannot return it, consider applying the solutions in section NVidia driver stopped responding” intermittent messages: can’t run Gen2 signalling at:

https://egpu.io/forums/expresscard-mpcie-m-2-adapters/mpcieecngff-m2-resolving-detection-bootup-and-stability-problems/

 

eGPU Setup 1.35    •    eGPU Port Bandwidth Reference Table


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nando4
(@nando4)
Noble Member Admin
Joined: 3 years ago
 
Posted by: seggybop

You might want to try the R42S series adapter, which has way better signal quality. The cases I tried where the Beast 9.0b failed all worked perfectly with the R42SF.

Can verify @seggybop‘s findings. EXP GDC 9.0b M.2 during testing has at best intermittent artifacting. At worst the system will hang during eGPU load. No amount of aluminium foil wrapping the HDMI cable or ferrite beading the input power has been able to improve matters. By comparison, a ADT-Link R43SL with 25cm cable has been fully stable. Even a x1 ADT-Link adapter with a longer 50cm cable used to guage compatibility is completely Gen3 stable. Have concluded that either the EXP GDC HDMI sockets or the interconnect cable result is signal degradation. A shame because it’s HDMI connectors allow an easy way to dock/undock the eGPU. Could run it at x4 2.0 but would rather not.

eGPU Setup 1.35    •    eGPU Port Bandwidth Reference Table


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defvs
(@defvs)
Active Member
Joined: 11 months ago
 

Just sent back my Beat 9.0 M.2 and swapped it for an ADT-Link R43. Wonderful, no more signaling issues, even on Gen 3.

Laptop : Mi Notebook Pro, i5-8250u undervolted + TDP unlocked, 8G RAM 256G nvme, MX150-2...
eGPU : Asus STRIX 1060-6G running over ADT R43SL (15cm) M.2 with Gen3 x4

Greetings from France !


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