Lenovo X1 Extreme Gen 1 - Razer Core X - Setup questions
 
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Lenovo X1 Extreme Gen 1 - Razer Core X - Setup questions  

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skarimi
(@skarimi)
New Member
Joined: 5 months ago
 

Hello egpu.io,

I recently set up my first eGPU. All is working for the most part with the exception of couple of issues. This is my first time trying eGPU and getting familiar with the setup so I don't know if there is something I am missing.

I understand that most setups are different from each other however, I hope that I can still get some help.

Here is my setup:
Lenovo X1 extreme Gen 1 (20MF)
Thunderbolt 3 port 1: Thinkpad TB3 Dock - This is used for connect USB devices (Mouse, Keyboard) and Ethernet. It also is used for powering on the laptop as it is closed on a stand.
Thunderbolt 3 port 2: Razer Core X w/ RTX 3060 - 2 monitors connected using DP, 1080p @ 144Hz

I had to do a clean installation of the Nvidia drivers to get both dGPU(1050ti) and eGPU(3060) correctly installed in Device manager. However, I then had to disable 1050ti as it was causing screen jitter and hiccups. I have found that this seems to be a common issue and the fix is as I have done to disable the 1050ti. Not sure if there is another way around this as the BIOS allows me to have either Hybrid or Discrete only so there is no way to turn off the discrete GPU...  Suggestions?
And now onto the "issues":

1. My External monitors only turn on when at the windows login screen.
I can hear the windows hardware installation sound before they turn on. Seems like the eGPU is not recognized pre-boot. I have played around with different BIOS settings to no avail.

a) Thunderbolt BIOS Assist Mode -> Disabled - I have enabled this but doesn't seem to make a difference as it also indicates in the option help to "Set to Enabled only to support Linux and Windows 10 prior to 1709". As I am on 20H2, I gather that the option won't do much.

b) Security Level -> User Authentication - I tried changing this option to No Security as it indicates that it would enable all thunderbolt connections from startup, however, changing this option to "No Security" will cause the laptop to get stuck on initial boot screen. When Core X is not connected, it would boot up but every time it is connected it will get stuck again. Back to "User Authentication" and it boots fine.

c) Support in Pre Boot Environment for Thunderbolt -> Disabled - tried enabled and there seems to be no difference.

 

2. Resolution issue on the first boot.
I believe this is due to the native resolution of the internal display which is 4K. As the eGPU is not started till the windows login screen, I believe that windows initially starts the login screen with the internal display resolution. This causes windows to load with a 4K resolution. Once the External Displays start up @ 1080p, there are some icons and some windows that are not properly shown.

I can sign out and sign back in and everything is 100% perfect, however, it is annoying to have to always sign out and sign back in every time I turn the laptop on. Has anyone experience this? Is there a fix?

 

Thanks and sorry for the long post.
~SK

Lenovo X1 extreme Gen 1 (20MF)
Thunderbolt 3 port 1: Thinkpad TB3 Dock
Thunderbolt 3 port 2: Razer Core X w/ RTX 3060


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RaggaMuffin
(@raggamuffin)
Active Member
Joined: 6 months ago
 
Posted by: @skarimi

I had to do a clean installation of the Nvidia drivers to get both dGPU(1050ti) and eGPU(3060) correctly installed in Device manager. However, I then had to disable 1050ti as it was causing screen jitter and hiccups. I have found that this seems to be a common issue and the fix is as I have done to disable the 1050ti. Not sure if there is another way around this as the BIOS allows me to have either Hybrid or Discrete only so there is no way to turn off the discrete GPU...  Suggestions?

Have you tried adjusting the settings in the Nvidia control panel, such as power management mode under 3D settings, and changing it to 'prefer max performance' or change which apps use the eGPU or even change your preferred graphics card globally from that setting. This could possibly help with that, I'm not sure though.

I had jitter when I minimised app windows, for example with my T480s + Razer Core X GTX 1080 build, but I'm not sure whether it was changing settings in the Nvidia control panel, or when I used DDU to uninstall all drivers and start again. That could be an option if fiddling with the settings does not work. 

2018 Lenovo T480s [8th,4C,U] + GTX 1080 @ 16Gbps-TB3 (Razer Core X) + Win10 / Arch


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