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5 Posts

09-03-2020

SG

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Legion 7i 15IMH05 Inherent Data Bottle Neck with TB3/Thunderbolt EGPU Connection

2020-09-03, 12:39 PM

So I just gotten this new latop to replace my old Asus Zephyrus GX501V due to the updated CPU and better battery life (without iCue of course). While setting up I found it strange that my older setup was giving better GPU scores across the board when connected to my Razer Core X + 1080Ti. Below are the compiled results and they speak for themselves. It seems that somehow the TB3 connection on the Legion 7i doesn't really pull the full potential of the EGPU. I scratched my head long for this and tried all driver updates, TB3 Controller updates etc and still couldn't out the reason.

 

3D Mark ScoresLegion 7i
CombinedGPUCPUSystemModeConnected to EGPU
771878337129LegionHybridYes
771378197164LegionHybridYes
771278137186LegionHybridYes
 
778479167717LegionDGPUYes
771977957270LegionDGPUYes
 
775478577222LegionDGPUNo
771378047241LegionDGPUNo

 

3D Mark ScoresAsus G501
CombinedGPUCPUSystemModeConnected to EGPU
721083444074AsusStandardYes
719383414043AsusStandardYes
      
 
548659473756AsusStandardNo

On a side note, my config with the 2070S MaxQ + 500Nitz RGB HDR panel supposedly have GSync. However no matter what I do, there is no option in the NVidia Control Panel to enable/disable the Gsync option. This problem I had called up lenovo support and they couldn't figure out either and would give me a call back. (it has been 3 days since with no callback).

 

I hope some one out there can enlighten me on these problems, which would otherwise set this laptop to be one of my favourite one I've owned so far.

 

 

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1 Posts

09-11-2020

NL

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Re:Legion 7i 15IMH05 Inherent Data Bottle Neck with TB3/Thunderbolt EGPU Connection

2020-09-11, 10:39 AM

Hi Mazer,

 

You need to change from dynamic graphics to discrete graphics in system bios (during boot press f2). Then nvidia control panel will show G-Sync options.

Note that g-sync is enabled by default in dynamic mode. 

 

Regards,

a 7i user :) 

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5 Posts

09-03-2020

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Re:Legion 7i 15IMH05 Inherent Data Bottle Neck with TB3/Thunderbolt EGPU Connection

2020-09-11, 14:28 PM

Yes, I did that, with hybrid mode off and ensure that it is running on the discrete GPU. with all latest drivers and the option is not showing. I called up my local tech support and their marketing gave me a response whereby my model doesn't support it because I apparently got the "Legion 7" and not the "Legion 7i".

 

I think that it is rather ridiculous that their marketing team do not know what they are talking about. FYI the Singapore website shows only 3 Panel options. Which means, as long as I select the 500Nits panel i should have the gsync option available.

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8 Posts

09-07-2020

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Re:Legion 7i 15IMH05 Inherent Data Bottle Neck with TB3/Thunderbolt EGPU Connection

2020-09-11, 20:40 PM

I had the same issue with Gsync not showing for a system purchased with it. I contacted Tech Support and they confirmed Gsync was not present even though I purchased a system with it.  

I saw your post and made the changes in the BIOS and Gsync is there now!  Hybrid is disabled in Lenovo Vantage.  Don't you need Hybrid on to increase battery life?  I was only getting 1 1/2 hours of battery life and concerned about that when many reviews have the system running about 5 hours. Thanks

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5 Posts

09-03-2020

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Re:Legion 7i 15IMH05 Inherent Data Bottle Neck with TB3/Thunderbolt EGPU Connection

2020-09-11, 22:39 PM

I jusy realised I didn't explain properly. I'm glad that some of us manage to get the gsunv menu out with hubrid mode off and discrete graphics on. But I couldn't get gsync even though I have ensured those steps were done.

 

Can I check what is your config?

 

Also, for your battery life. Have you disabled/uninstall icue?

 

 

In fact while hybrid mode is on i was getting about 1-2 hours battery life. With discrete graphics on and Hybrid mode off, I was gettimg 4-5 hours! Which definitely didn't make sense. However, this seems to be reported by some owners on reddit.

 

 

This is one of the very first laptop that I have no clue what it is doing and why it behaves like that.

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14 Posts

09-03-2020

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Re:Legion 7i 15IMH05 Inherent Data Bottle Neck with TB3/Thunderbolt EGPU Connection

2020-09-12, 0:12 AM

The battery life is terrible as long as you have the iCue software installed on the machine. It is broken and Corsair hasn't fixed it. Uninstall it completely from your machine and the battery like will greatly improve. 

 

With ICue software.....1 hour battery 

Without.....6-7 hours

 

Also, uninstalling the software only means you won't be able to change the patterns for the RGB but you can fully turn it on, increase or decrease the intensity of the lights and turn it off using the FN + up or down keys on the key board. Let me be 100% clear, as long as the iCue software remains on your machine, it doesn't matter whether the RGB is turned ON or OFF, your battery will be drained rapidly regardless

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1 Posts

09-22-2020

MX

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Re:Legion 7i 15IMH05 Inherent Data Bottle Neck with TB3/Thunderbolt EGPU Connection

2020-09-22, 14:53 PM

can you please put the model and specs that you have?

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5 Posts

09-03-2020

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Re:Legion 7i 15IMH05 Inherent Data Bottle Neck with TB3/Thunderbolt EGPU Connection

2020-09-23, 11:39 AM

My system specs as below:

System SKU LENOVO_MT_81YT_BU_idea_FM_Legion 7 15IMH05

Processor Intel(R) Core(TM) i7-10750H CPU @ 2.60GHz, 2592 Mhz, 6 Core(s), 12 Logical Processor(s)

BIOS Version/Date LENOVO E9CN45WW(V3.02), 25/8/2020

Name NVIDIA GeForce RTX 2070 Super with Max-Q Design

Installed Physical Memory (RAM) 16.0 GB

1TB NVME SSD Model SAMSUNG MZVLB1T0HBLR-000L2

 

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5 Posts

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Re:Legion 7i 15IMH05 Inherent Data Bottle Neck with TB3/Thunderbolt EGPU Connection

2020-09-23, 11:43 AM

Just incase anyone out there uses a EGPU like I do, I manage to get a closer score to my older setup now by disabling my Laptop DGPU in device manager. But its still around 200points less sitting at around ~8100 for the GPU score. I'm probably going to resign to myself that I'm never going to get my older higher score back convincing myself its probably the lower single core clock speed of 2.6gHz of the i7-10750H CPU vs the old 2.8Ghz i7-7700HQ.

 

=(

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16 Posts

04-27-2020

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Re:Legion 7i 15IMH05 Inherent Data Bottle Neck with TB3/Thunderbolt EGPU Connection

2020-09-28, 15:13 PM

The iCUE battery drain issue can be easily fixed by doing the following... no need to uninstall iCUE if you wish to continue using the application to customize your keyboard lighting patterns:

 

-Press Windows key + R.

-Type services.msc and press enter to open up the Services snap-in.

-Scroll down to the C's and locate three Corsair services (Corsair Gaming Audio Configuration, Corsair LLA Service, Corsair Service).

-Right click each service and select properties.

-Change start up type value to disabled.

-Press Apply.

-Press the Stop button to stop the service.

 

You need to perform the above action for each service. This will prevent the services from running in the background and spiking the CPU clockrate every time their stupid service polls hardware status information. iCue is garbage... especially so on these laptops. As is their firmware for the keyboard... which I suspect is not true Corsair hardware based off of the fact that the keyboard device hardware ID doesn't even link back to Corsair. Probably a cheap knock off that has been designed to use the same microcode. Just my opinion. 

 

Bear in mind that you will have to repeat the above steps every time you let the iCUE software update itself. Once the services are off your battery life should return to normal, and you'll still be able to use keyboard lighting if you wish. 

 

Hope this helps.  

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