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P50 and exp GDC v8.5c speed
 

P50 and exp GDC v8.5c speed  

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(@dfikgjdflk)
Active Member
Joined: 1 year ago
 

Hello, I have this setup:
P50, R9 390, exp gdc express card v8.5c, 750w PSU, external monitor.

Made it work and games like dark souls 3 run at max settings at 1080p at 60 fps but with stuttering because it's on EC 1, x1 1.1 says gpuz.

To make it work I had to force EC speed to gen 1, instead of automatic. I also had to set graphics to discrete, as I can't turn off dgpu on p50. Doesn't work ok hybrid mode, maybe windows can only handle two different GPU makers at the same time. 

I was able to expand the memory with the trick, large memory trick. What do I need to get ec3 going? Bought the exp gdc because that's all I found online. It is the version 8.5c.

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


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(@dfikgjdflk)
Active Member
Joined: 1 year ago
 

I've donne some more searching and from what i gathered, because it's a socketed cable, it doesnt perform as good as if it would be soldered. With that in mind, should i try the PE4C? It's quite pricey and it almost costs me double to import to france. Does PE4C work for sure at gen3 speeds?

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


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wimpzilla
(@wimpzilla)
Honorable Member
Joined: 3 years ago
 

Egpu users should definitively drop the Express card configuration.

The pci-e speed drop is not due only to the egpu adapter cable, BUT also depending how the EC port is connected to the motherboard.

 

Generally the egpu cable is shielded, but OFTEN the connection between the EC part and the motherboard is ABSOLUTELY NOT.

So in general, i would wish ppl here would stop completely to advising EC card egpu setups, understanding that its is not only a egpu adapter issue, but also a EC port issue.

If you have some doubt, take a sample of 50 old laptops owning an EC port, and check for each of these 50 laptops which one have a shielded EC port/motherboard connection.

You will be surprised, the EC port was not meant to work reliably on high demanding pci-e devices.

 

2012 13-inch Dell Latitude E6320 + R9 [email protected] (EXP GDC 8.4) + Win10
E=Mc²


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(@dfikgjdflk)
Active Member
Joined: 1 year ago
 

Well i saw multiple user with thinkpads P50 having gen3 speed expresscard setup so i think if it's confirmed to function it's worth using that instead of the insanely expensive TB3 enclosure (i can buy a new graphics card and a new CPU for the price of an enclosure that comes empty here in france)

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


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wimpzilla
(@wimpzilla)
Honorable Member
Joined: 3 years ago
 

Nobody said you should buy a TB3 enclosure.

The EC port in general have issues of shielding, as the egpu cable itself, that's why it is less reliable than a mini pci-e.

In your case, on the p50, the EC port is directly soldered to the motherboard, it is a new laptop so the EC connection is much better than the old ones.

It could be at this point that the cable cause the low pci-e speeds.

You should have opted for the EXP GDC M.2 version. I would have switched to a sata ssd instead of the nvme one and use the M.2 port as egpu.

It have similar gaming performances than a TB3 connection, running on a real 4x pci-e.

2012 13-inch Dell Latitude E6320 + R9 [email protected] (EXP GDC 8.4) + Win10
E=Mc²


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(@dfikgjdflk)
Active Member
Joined: 1 year ago
 

Its because I have nvme ssd on m.2 port that I tried ec. Now I will purchase pe4c, I was partially refunded the exp GDC, I'll probably sell it on eBay

I tried.3 different GPUs, same issue only works at gen1 speeds.

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


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jevtabg
(@jevtabg)
New Member
Joined: 7 months ago
 

On Lenovo T430 EC port is solidered to motherboard, so dont see problem there.
I have Beast V8,5c and have same problem.
On Gen1 everything works fine, but on Gen2 it restarts few seconds after launching benchmark or game.

Maybe problem is that GPU cause it is using lot of power.Card is GTX 770 wind force 4 GB 256 bit and it uses 2 x 8 pins for power.
Power supply is Thermaltake 630w modular and only graphic and beast are connected.

Lenovo T430 i5,8GB,256GB ssd + 256GB msata
EXP GDC Beast V8.5c - GTX 770 4GB 256bit


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Vlad_Tepes
(@vlad_tepes)
New Member
Joined: 2 weeks ago
 

@jevtabg

Hello! I think that your problem could be 2 things, at least.

1) Power Source
2) Interference with the Express Cable. I have a t430 with gtx 1050 ti and it works great with Gen2 speed. I played 5hs without issues.
I read that the express card cable must be free, without cables over or under, because it doesn't have a good shielded cable. Try that, because i have the same laptop and works great on Gen2

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


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rickterp
(@rickterp)
Active Member
Joined: 2 weeks ago
 

I also have the EXP GDC Beast v8.5c using ExpressCard. No issues with Gen2 speeds with my T430.

T430 x GTX 1060


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