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hydrocell

14" Lenovo Y410P Ideapad + GTX970@4Gbps+c-mPCIe2 (PE4C 2.1) + Win8.1

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Hi,

My first take on using an EGPU. Just wanted to play witcher 3 so bad.

My laptop:

- Lenovo Y410P

- i7 4700MQ 2.4Ghz

- 8GB RAM

- Geforce GT 750M dGPU, HD4600 iGPU

- Windows 8.1

My eGPU:

- Geforce GTX 970 Asus turbo

- PE4C v2.1a

- Antec 450W PSU

Configuration:

Just flashed my bios with the modded 3.05 version by svl7 to remove whitelisting.

Here are the steps I have taken:

- Dont plug the PE4C to your laptop yet

- Boot windows

- Disable the dGPU (GT750M in my case)

- Uninstal the drivers

- Go to BIOS, set video config to use iGPU only

- Shutdown, plug in the PE4C and then boot windows

- Once windows is booted, install the nvidia drivers

- Reboot

- Enjoy your new EGPU

Here are some pics of my laptop

7771013d85eafaeb46085cd4512bb181.jpg

f51bf9a13b0f969e0d11729abb149644.jpg

79a62dd944e0a939df8bc91a1f5f1b60.jpg

Im still waiting for the pcie extenders so i can clean up the case (see cables sticking out)

Pics from windows

7f0782c063a850132cbf203fd2f449dc.jpg

6f1b76a699896480025ed0d013bce347.jpg

1d8ddf9641b84f874e7486553209c537.jpg

Benchmarks

ac504dbc5f792214572f0ee9a2fe857a.jpg

heres my result using internal display

post-36617-14495000465786_thumb.png

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Thanks for the post! Can't wait for the pics!:banane58:

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Did you get the internal LCD to display images rendered from your external card? If so, was there a performance loss? Also, did you unplug the wifi card for the pci-e slot? Thinking of doing this with my y510p.

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Did you get the internal LCD to display images rendered from your external card? If so, was there a performance loss? Also, did you unplug the wifi card for the pci-e slot? Thinking of doing this with my y510p.

yes I did get the internal LCD working. It just worked by default. didn't do anything. Going to benchmark today but I think there is a performance loss. Yes had to unplug the wifi card.

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yes I did get the internal LCD working. It just worked by default. didn't do anything. Going to benchmark today but I think there is a performance loss. Yes had to unplug the wifi card.

Awesome looking forward to benchmarks and pictures!

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Did you ever benchmark this thing? Curious to see how much of a performance loss there was. Also curious about your routing of the cable from the wifi card slot.

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Yeah i am starting to benchmark today. Got busy at work. Updated thread with some pics

Sent from my iPhone using Tapatalk

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:Banane47:only 'bout 15% performance drop(compared to external display) when using internal display.

now 'm thinkin' 'bout doing egpu on my y400.

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:Banane47:only 'bout 15% performance drop(compared to external display) when using internal display.

now 'm thinkin' 'bout doing egpu on my y400.

yeah its awesome do it. I don't even bother using my external display. Playing witcher 3 from the internal display without problems so far :)

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Followed your steps, but laptop appears to only use internal intel card now. Is there something I am missing? Y510p user here.

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Followed your steps, but laptop appears to only use internal intel card now. Is there something I am missing? Y510p user here.

did you check device manager if it detected your egpu card? before installing the nvidia driver

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Got it working, had to mess with drivers some. Not getting full performance it seems though. 6874 in 3dmark on internal display, no external to test it with. Is there a way to see what speed my pci port is operating at? Did you do any overclocking anywhere?

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Switched to UMA only in BIOS, still can see GT750 in device manager. Disabled 'special features' in video configuration, this completely disabled integrated intel so I can't use Optimus (and monitor works only connected directly to GTX970).

So, how exactly do you disable discrete graphics on this laptop.

I have a pretty much the same configuration with PNY GTX970.

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It wasn't SLI, just some BIOS option I didn't switched properly. I tried again and I've managed to disable only internal nvidia keeping intel working.

Interesting results though with 3DMARK Fire Storm

With *only* GTX970 working on external monitor connected to GTX970: Score: 7602 / Graphics Score: 9736 / Physics Score: 6210 / Combined Score: 3295

With iGPU and GTX970, external monitor connected to laptop HDMI: Score: 6633 / Graphics Score: 7321 / Physics Score: 6921 / Combined Score: 3755

With iGPU and GTX970, external monitor connected to GTX970 HDMI: Score: 7781 / Graphics Score: 9542 / Physics Score: 6850 / Combined Score: 3570

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Mine was working, then I clean installed the bios and os (long story) and now it doesn't work correctly. My internal dGPU still shows up in device manager, along with the 970. I cannot open NVidia Control Panel, it simply states I have no displays connected. Could one of you post your exact bios settings that got yours to work, I have been fiddling for hours and cannot for the life of me get it working again.

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Configuration->Graphics Device->UMA Only

Video Features->Pci Express Graphic->Always Enable PEG: Disabled

I think that's it.

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Do you guys see a huge performance drop in GTA V? On my external monitor I get like 80-100 fps, internal I get less than 30.

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Did some more testing / benchmarking. On external screen, I get 8552 on 3dmark. On my internal screen, I get 6950, with the graphics score being significantly lower (~3000 points). I feel like the optimus compression is not working correctly, as my performance drop is ~20% on my internal lcd compared to ~10% on op's internal screen. Is there anything I am doing incorrectly here?

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I have question: do I loss portability when doing this? For example: I will be playing at home with the egpu, but then I want to play somewhere else with 750m sli, what should I do?

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