2019 14" Lenovo Yoga C940 [10th,4C,G] + RX 5700 XT @ 32Gbps-TB3 (Razer Core X) +...
 
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2019 14" Lenovo Yoga C940 [10th,4C,G] + RX 5700 XT @ 32Gbps-TB3 (Razer Core X) + Win10 1909 [Topher]  

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Romzy
(@romzy)
New Member
Joined: 1 year ago
 

@topher

Congrats on the build! Glad to hear that it seems to be working well for you. =)

I just got a C940 (i7-1065G7) of my own and am strongly considering a similar setup. I have two questions that I hope you may be able to shed some light on.

1. What are the thermals like for the laptop? I'm worried about its longevity if I use it for regular gaming with an eGPU - though I realize that thermals are going to be fairly high in all thin and light laptops.

2. Do you know how much power the i7 gets? I see that there are 9W, 15W, and 28W versions of the 1065G7 but I haven't been able to figure out which version is in the C940.

Thanks!

EDIT: 3rd question: Do you find you're able to get enough power for the laptop through the TB3 connection to the Razer Core X when gaming? That's assuming that you're using both TB3 ports (one for the monitor(s) and one for the egpu) and thus don't have space to also plug in the power adapter.

This post was modified 1 year ago

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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Jack Langston
(@jack_langston)
New Member
Joined: 1 year ago
 

@topher

Do you think the 15" version will be the same? Yoga C940-15IRH?

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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Jack Langston
(@jack_langston)
New Member
Joined: 1 year ago
 

It does work. Are there any software configuration settings that make it easier to transition from notebook to notebook + egpu? If I go from off with the egpu connected, I have to then restart to get the egpu going. If I let the notebook 'sleep' it's much better. I told it to quit going into tablet mode and also to never sleep if I close the lid on power, but if there are other settings would be helpful, I'd appreciate it. I'm loving it.

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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Kevin Maestre
(@kevin_maestre)
Active Member
Joined: 1 year ago
 
Posted by: @topher
Posted by: @the_livy

@topher
I ordered the same laptop myself, only difference is that i got 16GB RAM (only option available here) and the 1TB SSD instead of the 512GB. My eGPU worked right from the start as well, just plug in, install drivers and ready to go. However, I'm a bit curious, does yours also have an issue with waking from sleep (no eGPU connected) after Windows Updates decides to force driver updates, no matter if device installation is set to disabled and using software to "force disable" automatic driver updates? Since mine keeps behaving like that (and I already reinstalled Windows 3 times to try and fix this issue since I got it last Friday) I already asked Lenovo to send it back though, but I'm still curious if that's just a one time tough luck situation or a general issue?

Ah....would have loved that option for increased RAM and SSD.  But I got this on sale at Best Buy for $1199 so I can't complain too much.  I haven't noticed any issues with the system waking, but I'm not sure if there have been any forced driver updates.  Only real issue I had was random errors out of the box.  So much so that I did a clean install of Windows.  I'm guessing the problem was either all the bloatware they installed or just a faulty image in the factory.  Hopefully that is just a rare issue  you encountered, but I will certainly keep on eye out for it

@topher and @the_livy

I just received my C940 last week. For some odd reason when i connect my eGPU (running 2080 SUPER with Razer Core X).... and I use the laptop extensively for a while ( either game, or watch movies, sometimes just having many tabs open) the computer will freeze on me completely where only a hard restart will fix the issue. 

Have you gone thru this issue before? Does this laptop get toooo hot easily? 

Let me know as soon as you can. 

Posted by: @romzy

@topher

Congrats on the build! Glad to hear that it seems to be working well for you. =)

I just got a C940 (i7-1065G7) of my own and am strongly considering a similar setup. I have two questions that I hope you may be able to shed some light on.

1. What are the thermals like for the laptop? I'm worried about its longevity if I use it for regular gaming with an eGPU - though I realize that thermals are going to be fairly high in all thin and light laptops.

2. Do you know how much power the i7 gets? I see that there are 9W, 15W, and 28W versions of the 1065G7 but I haven't been able to figure out which version is in the C940.

Thanks!

EDIT: 3rd question: Do you find you're able to get enough power for the laptop through the TB3 connection to the Razer Core X when gaming? That's assuming that you're using both TB3 ports (one for the monitor(s) and one for the egpu) and thus don't have space to also plug in the power adapter.

I believe my laptop has an issue with termals at the moment. So i cant answer Question 1. 

Question 2: it gets the 15W version. Which is honestly sufficient. From what i read the 28W version only provides a 10% difference in processing speed, but it will get hotter. 

 

Question 3: With the Razer Core X you will get more than enough power. Delivery from the Core X is 100W, youre standard charger is 65W. I use one cable for my Razer Core X and a 49in UltraWide. 

Lenovo C940 14in - 4k Display - 1TB NVME - 16GB RAM - 10th Gen Intel i7 Processor with G7 Iris Graphics + Razer Core X Chroma + EVGA 2080 SUPER XC - 49in CRG90 Samsung Ultrawide Monitor.


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JediTreasley
(@jeditreasley)
Active Member
Joined: 2 years ago
 

Was glad to see some people using a 5700 and a windows laptop.  I actually have a Matebook X Pro 2018, and a OWC and Razer Core X.  I have a 5700 on the way.  I did have an RTx 2060 non super but I wanted more performance.  I ordered both a 2070 super and an RX 5700 non XT.  I put up a post with benchmarks for a 1660 ti and 2060.

Why are there so few people using a 5700 with egpus? How are y’all’s general experiences with the 5700 versus NVidia cards?

This post was modified 1 year ago
2018 14" Huawei MateBook X Pro (MX150) [8th,4C,U] + RTX 2060 @ 16Gbps-TB3 (OWC Mercury Helios FX) + Win10 [build link]  

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prasys
(@prasys)
Active Member
Joined: 2 years ago
 

Now do you guys get a boot-loop if the eGPU is plugged in ?

Thinkpad X1 Extreme (Gen 1) - 8750H | 16 GB RAM | 1050 Ti (Onboard) | GAMING BOX RTX2070 eGPU

 
2018 15" Lenovo Thinkpad X1 Extreme (GTX1050Ti) [8th,6C,H] + RTX 2070 @ 32Gbps-TB3 (AORUS Gaming Box) + Win10 [build link]  


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Kevin Maestre
(@kevin_maestre)
Active Member
Joined: 1 year ago
 

@prasys

Yeah especially when i restart with it connected. I have to disconnect, login, then connect it.

 

Do you get any freezing problems with yours? Or like it gets hot with fans running fast? lmk

Lenovo C940 14in - 4k Display - 1TB NVME - 16GB RAM - 10th Gen Intel i7 Processor with G7 Iris Graphics + Razer Core X Chroma + EVGA 2080 SUPER XC - 49in CRG90 Samsung Ultrawide Monitor.


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Kay Brock
(@kay_brock)
New Member
Joined: 1 year ago
 

@topher

Thank you for sharing your configuration. As it is quite similar to my config I wonder if you might have a tipp helping me with one of the several issues I was facing. 

My config:

Lenovo Yoga C940

14" UHD 
Intel Core i7-1065G7 
Integrated Intel Iris Plus Graphics
16GB LPDDR4X-3733
1 TB SSD  PCIe NVMe

eGPU Hardware
Razer Core X
AMD Radeon  5700 XT

Issues

1. Always Code 12 Error in Device Manager if the eGPU is connected after boot. It is only working if the eGPU is connected and powered on before boot.

2. Boot only works if no external monitor is connected to the eGPU. As soon as a monitor is connected to the eGPU while booting, the system ends up in a continous bootloop which restarts the system before you are able to enter the BIOS. The external montior works if connected after boot.

3. When an external monitor is used only, the picture freezes sporadically for a short moment, It does not happen in Dublicate or Extented mode, when the eyternal Monitor is used together with the internal laptop monitor. The issue can be solved by signing of and on again with the external monitor only but reoccurs as soon as the internal monitor has been activated one time. 

Any help is appreciated.  Even the confirmation that you have none of these issues would be helpful.

Kind regards

Kay

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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Kevin Maestre
(@kevin_maestre)
Active Member
Joined: 1 year ago
 

@kay_brock

I have similar setup i mention it above.

1. I dont see an error 12.

2. i go thru 2 all the time. I have to reboot, and connect after bios. 

3. Disable the integrated GPU. That should work. Make sure the AMD control panel you are preferring to use the GPU than the integrated one. 

Lenovo C940 14in - 4k Display - 1TB NVME - 16GB RAM - 10th Gen Intel i7 Processor with G7 Iris Graphics + Razer Core X Chroma + EVGA 2080 SUPER XC - 49in CRG90 Samsung Ultrawide Monitor.


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Kay Brock
(@kay_brock)
New Member
Joined: 1 year ago
 

@kevin_maestre

First of all thank you for your reply !

Good to know not being alone with the issues. May I ask whether your boot loop also occurs with no external monitor connected to the eGPU. In my case this fortunatelly works. Otherwise it would be a deadlock situation, because I need to connect the eGPU while boot to avoid the code 12. 

With regards to the code 12, what Windows 10 Version are you using? I have read that the error  might be introduced  with a newer Windows 10 Build.

 

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

.

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