can there be static/grounding issues with a exp gdc expresscard to a w520 laptop?  

 

(@mithaldu)
New Member
Joined:3 months  ago
Posts: 2
February 10, 2018 8:40 am  

I run an EXP GDC 8.5c via express card on a w520 laptop, using a corsair rm650x, and a stock asus gtx 1050.


It runs pretty smooth, but occasionally glitches. I see checkerboard patterns flash occasionally when mousing over videos in chrome, or in games like this:

Today this timeline happened in the morning:

6:00 - i plug my headphones into the usb sound card ... the graphics card resets itself
7:00 - i get up to get a drink, return, touch the headphones (tiny little earbud ones with a metal grid), get zapped a little ... the entire laptop goes black and i have to hard reset it
7:15 - i adjust volume on the speakers plugged into the laptop's audio-out, by turning their dial ... ingame graphics do the flickering glitch while i turn, not when i try a second time

What is this? Is the EXP GDC not grounded properly and accumulating static charge? Is my laptop not properly grounded?

I've tried attaching a cable between the graphics card bracket and the PSU now, to see if that helps, but otherwise i'm not sure where to start with this.


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nando4
(@nando4)
Noble Member Admin
Joined:1 year  ago
Posts: 1679
February 10, 2018 8:47 am  

Yes, in the following thread it was discovered the EXP GDC has poor EMI/pulse suppression:

https://egpu.io/forums/expresscard-mpcie-m-2-adapters/help-switching-on-room-light-freezes-my-laptop/

You may consider adding ferrite beads to the EXP GDC, or aquiring a BPLUS PE4C or a modded US$7 PCE164P-N03 to connect to a EC port:

https://egpu.io/forums/expresscard-mpcie-m-2-adapters/too-sensitive-egou-beast/#post-15691
https://egpu.io/forums/builds/2012-14-hp-8470p-9600gt4gbps-ec2-7-egpu/

Edited: 3 months  ago

eGPU Port Bandwidth Reference TableeGPU Setup 1.35


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(@mithaldu)
New Member
Joined:3 months  ago
Posts: 2
February 10, 2018 9:00 am  

Wow, extremely fast answer and on point. Thank you!

I'll try the ferrite bead thing today, and also see about giving the other ones a try. Two questions on that:
I'm quite wary of giving mods a try on my own. Are there places to buy a modded PCE164P-N03? 
The BPLUS PE4C with expresscard is sold out on their official website. Can you recommend any other stores that would deliver to Germany, other than ebay?

Also, a small piece of feedback: I had checked the buyer's guide repeatedly for information like this, and entirely missed that the "NO" in the table is a link. Maybe add a blue [1] link after it for oblivious people like me? 🙂


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