2020 15" Lenovo Legion 7i (RTX2070S) [10th,8C,H] + RTX 3080 @ 32Gbps-TB3 (Razer ...
 
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2020 15" Lenovo Legion 7i (RTX2070S) [10th,8C,H] + RTX 3080 @ 32Gbps-TB3 (Razer Core X Chroma) + Win10 20H2 [Wildfear]  

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wildfear
(@wildfear)
Trusted Member
Joined: 10 months ago
 

 

Hello everyone !

I was lurking on this site / forum for quite some time, now I feel to share my last setup  Smile  

It's still a work in progress as I have to let the casing open to avoid PSU fan going crazy.

 

System specs :

Laptop :

Lenovo Legion 7i ( 2020 / 15imhg05 / 81yu / 81yu0006fr ) 

i7 10875H / 16GB 3200MHz / 1To + 2To NVME

dGPU : RTX 2070 MaxQ

Screens :

- main : Acer Predator XB271HUBMIPRZ (27" WQHD 165Hz IPS)

- secondary : SKILLKORP SKP_E20-27 (27" WQHD 144Hz VA)

OS :Windows 10 20H2 (19042.685)

 

eGPU hardware :

eGPU enclosure : Razer Core X Chroma 

TB3 Cable : from Razer bundle

eGPU card : MSI GeForce RTX 3080 VENTUS 3X 10G OC

 

Hardware pictures :

 

Installation steps :

No fresh OS install, just updated to Windows 20H2

Tried each available bios and now using v2.02

Undevolted CPU (-185mv) and set internal GPU mode to discrete GPU only (bios / hardware switch)

Used DDU to clean drivers and stop auto update

Installed last NV (460.97) from device manager for internal RTX 2070

Hotlug eGPU and install drivers for RTX 3080 form device manager

Tweaked RTX 3080 : undervolted GPU set to 850mv for 1890Mhz and overclocked RAM to +584Mhz (10005MHz)

 

Benchmarks :

Heaven

 

Superposition

 

Timespy

 

Port Royal

 

Comments :

> I have to hotplug eGPU after windows boot to avoid BSOD "DMA drivers", didn't encouter this issue with my last build (msi prestige 15 i7-10710U GTX1650 / Core X Chroma / 2080 super)

> If I stay on hybrid mode (dGPU and iGPU online) I get a lots of stuttering. Not really an issue, NV optimus seems badly implanted on this device and battery is even better without it.

2021 16" Lenovo Legion 5i Pro Gen 6 (RTX3060) [11th,8C,H] + RTX 3080 @ 32Gbps-TB4 (Razer Core X Chroma) + Win10 21H1 [build link]  

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wildfear
(@wildfear)
Trusted Member
Joined: 10 months ago
 

> I have to hotplug eGPU after windows boot to avoid BSOD "DMA drivers", didn't encouter this issue with my last build (msi prestige 15 i7-10710U GTX1650 / Core X Chroma / 2080 super)

I tried again to clean NV drivers through DDU and also uninstall/clean drivers for usb hub part of the enclosure. Pray  

And no more BSOD on boot with eGPU plugged. Smile  

 

Got another "DMA drivers" BSOD when i tried to connect an usb hub (for deported ports) so it seems that it's more an USB (ASMedia) drivers issue than proper eGPU one.

Any advice to solve this usb driver issue ?

2021 16" Lenovo Legion 5i Pro Gen 6 (RTX3060) [11th,8C,H] + RTX 3080 @ 32Gbps-TB4 (Razer Core X Chroma) + Win10 21H1 [build link]  

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vava
 vava
(@vava)
New Member
Joined: 9 months ago
 

Hey, I have the same Laptop and was thinking of going the razer core x chroma route, would you pick this again if you could start over? I saw on razers site it supports up to 2080ti. Nice build btw 😀 

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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wildfear
(@wildfear)
Trusted Member
Joined: 10 months ago
 

First of, this enclosure is one of the best and supports almost all GPU.

But there still some issues if you want to use it as a docking solution.

You may encounter different problems :

- usb disconnect

- usb stuttering

- ethernet disconnect

- BSOD on cold-boot

 

Right now I only use it for the eGPU part and it's really frustating !

Still hoping to find drivers / software / firmware solution...

 

To answer you, if I had to start again I might pick up an eGPU only solution or maybe the last gigabyte 3080 gaming box.

 

As for the lenovo legion 7i, I have two main complaints : the impossible-to-disable RVB vomit at boot and no charging through usb type C ports !

Otherwise I love it !

2021 16" Lenovo Legion 5i Pro Gen 6 (RTX3060) [11th,8C,H] + RTX 3080 @ 32Gbps-TB4 (Razer Core X Chroma) + Win10 21H1 [build link]  

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wildfear
(@wildfear)
Trusted Member
Joined: 10 months ago
 

Posted by: @wildfear

It's still a work in progress as I have to let the casing open to avoid PSU fan going crazy.

I changed the PSU fan as it was too loud after sometime with high GPU load.

Got an Artic F8 silent and it's perfect now.

 

I also removed the 12cm case fan and put a 14cm one (be quiet pure wings 2) in place of the rear panel.

Still have to figure how to make the rear face more aestetic (and replace double face tape with the right screw).

2021 16" Lenovo Legion 5i Pro Gen 6 (RTX3060) [11th,8C,H] + RTX 3080 @ 32Gbps-TB4 (Razer Core X Chroma) + Win10 21H1 [build link]  

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wildfear
(@wildfear)
Trusted Member
Joined: 10 months ago
 
Posted by: @wildfear

I also removed the 12cm case fan and put a 14cm one (be quiet pure wings 2) in place of the rear panel.

Still have to figure how to make the rear face more aestetic (and replace double face tape with the right screw).

Added plexyglass to finish the rear panel :

 

 

Also removed the PCIE usb / ethernet card > ASMEDIA usb controler seems to be the cause of most of my issues (RIP the cable dock goal !)

2021 16" Lenovo Legion 5i Pro Gen 6 (RTX3060) [11th,8C,H] + RTX 3080 @ 32Gbps-TB4 (Razer Core X Chroma) + Win10 21H1 [build link]  

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wildfear
(@wildfear)
Trusted Member
Joined: 10 months ago
 
Posted by: @wildfear

Also removed the PCIE usb / ethernet card > ASMEDIA usb controler seems to be the cause of most of my issues (RIP the cable dock goal !)

+ disabling Intel VT in bios and with lastest NV drivers (27.21.14.6133) got much better bench:

Time SPY : http://www.3dmark.com/spy/17727968

3DMark Score : 13384
Graphics Score : 14162
CPU Score : 10209
Graphics Test 1 : 93.59 fps
Graphics Test 2 : 80.22 fps
CPU Test : 34.3 fps

 

Time SPY Extreme : http://www.3dmark.com/spy/17728568

3DMark Score : 7065
Graphics Score : 7799
CPU Score : 4608
Graphics Test 1 : 49.59 fps
Graphics Test 2 : 45.72 fps
Average simulation time per frame : 75.9 ms

 

Port Royal : http://www.3dmark.com/pr/812760

3DMark Score : 8344
Graphics Score : 8344
Graphics Test : 38.63 fps

2021 16" Lenovo Legion 5i Pro Gen 6 (RTX3060) [11th,8C,H] + RTX 3080 @ 32Gbps-TB4 (Razer Core X Chroma) + Win10 21H1 [build link]  

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wildfear
(@wildfear)
Trusted Member
Joined: 10 months ago
 

Some more testing :

 

I have a TB3 dock, the HP G2 and I tried daisy chaning the eGPU with it.

It's working very well but with expected performance loss : arround -12%.

Timespy with and without the G2 dock between laptop and eGPU :

https://www.3dmark.com/compare/spy/17909482/spy/17911831#

 

3DMark Score : 12 209 vs 13 648 +11.8 %

Graphics Score : 12 673 vs 14 492 +14.4 %

CPU Score : 10 114 vs 10 265 +1.5 %

Graphics Test 1 : 84.88 fps vs 96.47 fps +13.7 %

Graphics Test 2 : 70.98 fps vs 81.58 fps +14.9 %

CPU Test : 33.98 fps vs 34.49 fps +1.5 %

2021 16" Lenovo Legion 5i Pro Gen 6 (RTX3060) [11th,8C,H] + RTX 3080 @ 32Gbps-TB4 (Razer Core X Chroma) + Win10 21H1 [build link]  

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