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eGPU detected, but not used by windows / semi solved
 

eGPU detected, but not used by windows / semi solved  

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dziabdziak
(@dziabdziak)
New Member
Joined: 1 month ago
 

Hi.

Setup is rx470 + lenovo g780 on win 10 x64. eGPU is detected, drivers installed, but I can't make system to use it in applications.  As standard this laptop has nvidia mobile gpu + intel hd. I can't right click on application and choose "use high performance gpu" like I did without eGPU, I had to add a program like this guy shows at 16:45

For me it doesn't work. I can add program, I can choose high performance mode for that program and I see, that with high performance GPU windows will use rx470 as shown on that video. But it just won't use it.

Gpu-z shows rx as second card, furmark see 2 cards (intel + rx), msi afterburner also - it allows me to change fan speed etc. I can do everything but rx is not used to render graphics. eGPU is not connected to external monitor.

GPU works well, I checked it on my PC. I also switched rx470 to rx580 from my pc to deny gpu failure, so I'm sure, that 470 works well.

Does anybody have an idea what the #$%&@ is wrong? 😉

This topic was modified 4 weeks ago

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


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dziabdziak
(@dziabdziak)
New Member
Joined: 1 month ago
 

Wierd thing, in Path of Exile game detects rx470 as only one gpu (greyed) and use it. So, there is a question, why other apps don't use rx? Maybe this is DX issiue?

Also, I tried to connect external monitor to GPU - black screen (dvi - adapter dvi/vga - monitor). As mentioned in lead post, rx posts signal to monitor as I checked on my PC (dvi - adapter dvi/hdmi - minitor).

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


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glitchglitch
(@glitchglitch)
New Member
Joined: 4 weeks ago
 

You can usually change it in the control panel application for your GPU. Here is the process for an Nvidia card...unfortunately I'm a bit unsure about Ati cards. Hope this helps!

https://gaming.stackexchange.com/questions/72567/can-i-force-steam-to-use-my-nvidia-gpu-instead-of-the-integrated-intel-card

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


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dziabdziak
(@dziabdziak)
New Member
Joined: 1 month ago
 

I figured, that the type of connection is a key here.

1) When I connect eGPU to the laptop I can't use eGPU as screen display manager, also some apps don't use it (as mentioned in lead post).

2) The same as 1 but with external minitor connected to the laptop situation is the same about eGPU usage.

3) When I try to connect eGPU to the external monitor two scenarios happens:

*3a) If I use vga cable (and/or any analog-mechanic switches to output vga to monitor) eGPU acts as in paragraph 1.

*3b) If I use hdmi cable, well... Magicly all works as intended, eGPU is used in any application when I change display settings to display only on external display.

So it seems, that imput/output signal between eGPU and external monitor makes the diffrence.

I will try to change signal to vga by another type of converter like that images.morele.net/i1064/1423123_0_i1064.jpg maybe it will also help. I'll post how it worked.

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


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