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Nickh1
Paper Tape
Posts: 5
Registered: ‎09-03-2017
Location: US
Views: 28,060
Message 1 of 9

Laptop Lags When Connected To External Monitor

My laptop has extreme lag when I connect to an external montior. Ive tried two monitors, with no luck and using the same games I run 80fps on, on the laptop monitor I get 20 on the external monitor. I use a kensington usb 3.0 docking station and when I put the monitor directly into that it lags very badly and if I also put the monitor into my laptop it also lags very badly. My computer is plugged in and ive checked the power settings to make sure im on the high performance battery setting so video is optimized. Both monitors are 60hz 1080p.

 

This is my exact laptop: http://www.microcenter.com/product/479048/legion_y720_156_gaming_laptop_computer_-_black

 

Help is appreciated, thanks.

Guru
Posts: 3,429
Registered: ‎04-02-2014
Location: MX
Views: 28,017
Message 2 of 9

Re: Laptop Lags When Connected To External Monitor

This is probably because the external monitor is not utilizing the Discrete GPU.

 

Which mode are you using to display on the 2nd monitor? (Duplicate/extended etc)

 

Can you make sure in NVIDIA control panel that the external monitor settings look fine.

Is the external monitor set to a preset resolution?

 

When you play the game, does it run on both monitors?

---------------------------------
Current System - Lenovo Y720
Y720 REVIEW - Youtube Link (Opens in New Tab)
If your experience was good today, please feel free to give KUDOS. It Ain't Over, 'til it's over.
Nickh1
Paper Tape
Posts: 5
Registered: ‎09-03-2017
Location: US
Views: 28,011
Message 3 of 9

Re: Laptop Lags When Connected To External Monitor

I have two externals, running on extended with laptop display off. I opened nvidia panel and it said i am not running a display attached to a nvidia gpu, so I assume its running on discrete? No, game doesnt run on both monitors.

Nickh1
Paper Tape
Posts: 5
Registered: ‎09-03-2017
Location: US
Views: 28,008
Message 4 of 9

Re: Laptop Lags When Connected To External Monitor

When I try and change my default gpu it tells me I cant open nvidia control panel, any ideas :/?

Guru
Posts: 3,429
Registered: ‎04-02-2014
Location: MX
Views: 28,006
Message 5 of 9

Re: Laptop Lags When Connected To External Monitor

Can you please run MSI Afterburner while playing the game and see how the GPU usage is displayed?

 

Also, having 2 external monitors connected I am not sure how this is utilizing NVIDIA optimus and maybe that is the issue?

I usually just connect 1 external and it works fine.

---------------------------------
Current System - Lenovo Y720
Y720 REVIEW - Youtube Link (Opens in New Tab)
If your experience was good today, please feel free to give KUDOS. It Ain't Over, 'til it's over.
Guru
Posts: 3,429
Registered: ‎04-02-2014
Location: MX
Views: 28,001
Message 6 of 9

Re: Laptop Lags When Connected To External Monitor

Can you please try this with only 1 external monitor?

 

Also, please specify how are you connecting 2 monitors? (which port/connector)

---------------------------------
Current System - Lenovo Y720
Y720 REVIEW - Youtube Link (Opens in New Tab)
If your experience was good today, please feel free to give KUDOS. It Ain't Over, 'til it's over.
Nickh1
Paper Tape
Posts: 5
Registered: ‎09-03-2017
Location: US
Views: 27,997
Message 7 of 9

Re: Laptop Lags When Connected To External Monitor

Ive tried with 1 monitor plugged into both the laptop and my kensington docking station. Runs just as slow.
This is the connector, ill test msi afterburner now on overwatch. https://www.amazon.com/Kensington-SD3500v-Universal-Display-K33972US/dp/B009F7E730
Guru
Posts: 3,429
Registered: ‎04-02-2014
Location: MX
Views: 27,990
Message 8 of 9

Re: Laptop Lags When Connected To External Monitor

Connecting directly to the laptop should definitely work without issues and the GPU should switch automatically.

Try a power flee (for 1 monitor setup) -

 

Shutdown and disconnect power adapter

Press power button for 45 seconds

Connect and start again.

 

Then connect only 1 monitor (display only on external), run MSI afterburner, run game and test it please.

---------------------------------
Current System - Lenovo Y720
Y720 REVIEW - Youtube Link (Opens in New Tab)
If your experience was good today, please feel free to give KUDOS. It Ain't Over, 'til it's over.
Nickh1
Paper Tape
Posts: 5
Registered: ‎09-03-2017
Location: US
Views: 27,975
Message 9 of 9

Re: Laptop Lags When Connected To External Monitor

Thanks so much for the help my dude, kudos to you Smiley Happy

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