Question FPS drops when laptop is connected to an external monitor ?

[thepenguin22]

I own a Lenovo Ideapad Gaming 3 15AHC6 with:
CPU: AMD Ryzen 5 5600H
GPU: NVIDIA Geforce RTX 3050
RAM: 24GB DDR4 3200Mhz
SSD: 512GB

When I play I always have my laptop connected to a AOC 27G2U 27-inch monitor via HDMI - . I use this monitor as the primary screen so the laptop screen is always off and I have the refresh rate set at 144hz.

However I’ve noticed that when I’m playing using the AOC monitor I lose some fps (20-30 fps) so the game is averaging like 80/90 fps, but if I’m using the laptop screen to play, I get are around 120-140 FPS.
Any idea why this happens? Could it be because the external monitor is bigger (27’) and so it uses more GPU and I lose fps?

 

[ChiefJoe89]

I own a Lenovo Ideapad Gaming 3 15AHC6, AMD Ryzen 5 5600H/NVIDIA Geforce RTX 3050/24GB RAM DDR4 3200MHZ/512GB SSD and when I play I always have my laptop connected to a 27’ external monitor via HDMI - AOC 27G2U. I use this monitor as the primary screen so the laptop screen is always off and I have the refresh rate set at 144hz.

However I’ve noticed that when I’m playing using the AOC monitor I lose some fps (20-30 fps) so the game is averaging like 80/90 fps while if I’m using the laptop screen to play the fps I get are around 120-140. Any idea why this happens? Could it be because the external monitor is bigger (27’) and so it uses more GPU and I lose fps?

Also posted here: https://forums.tomsguide.com/thread...p-is-connected-to-an-external-monitor.507831/

I have a similar issue and after trying multiple combinations of connecting my external monitor to my laptop I think the problem is that the port you/we are using for the external monitor is hardwired to the UHD/integrated graphics. Some laptops have a mux switch that will allow you to bypass the iGPU to the high performance GPU (rtx 3050 ti in my case), but unfortunately my laptop is not equipped with said switch.

If anyone has a solution, I'd love to hear it.

 

[Karadjgne]

The way it's supposed to work is laptops are all about battery life. Almost all laptops don't use line voltage to run, they use the battery, line voltage is used to recharge the battery, so that constant discharge/charge cycle is where much of battery life/heat issues come from.

Consequently, the igpu runs all the time, the gpu is only used at certain times, like 3d applications, but even then the igpu will switch in/out depending on the screen. So things like menus will be igpu, the gpu not kicking in until there's actual 3d file use.

Without that happening, even with line voltage charging the battery, it's possible with a big gpu to drain the battery to the point the gpu is shut down and even the 3d apps are run by the igpu.

The higher the fps and resolution, the higher the power usage, so it's possible you are hitting power limits, which is dropping fps as a result. Just because ypu get 140+fps on 1600x1200 doesn't necessarily mean you'll hit 140fps+ at 1920x1080 or higher, regardless of what Hz the monitor is set for.

It's not a desktop with a 200w+ gpu and 650w psu, it's a laptop with a 25w± gpu and a 19v (@ 40w) charging system.

 

[merlo]

Hello,

sorry for hijacking an older thread, but did any of you solved this issue by any chance?

A friend of mine is having an issue exactly like the OP.

Same GPU, same resolution and refresh rate.

BUT this problem occurs only in the game Kingdom Come Deliverance 2.

Any other game seems to be running fine, including CyberPunk 2077 for example.

Thanks in advance for any help!

 

[Phillip Corcoran]

Hello,

sorry for hijacking an older thread, but did any of you solved this issue by any chance?

Please start your own thread as this one is dead. You're wasting your time trying to get help on a thread which is over 2 years old. Closing thread .............................