topic Re: autocad works slower when using an external monitor !?!!? in AutoCAD Forum

autocad works slower when using an external monitor !?!!?

OGOUN — Mon, 16 Sep 2024 13:11:16 GMT

Hi there !

I'm working on Autodad 2025 on a Lenovo with an i9 processor and a NVIDIA Quadro RTX 5000 Max-Q graphic card.

I'm doing pretty basic steel constructions 2D drawings and I have no problems when I work on the laptop but today I plugged my big EIZO EV2736W monitor.

The laptop doesn't have a DisplayPort slot and the monitor doesn't have a an HDMI slot so I used an HDMI cable with an HDMI>Displayport adaptor on the monitor side.

I use a single screen display (EIZO monitor) and Autocad is slow and have some lags, the cursor moves in a herky-jerky way and for exemple it's very difficult to stretch my drawing.

Anyone know why I have this issue ?

Thanks a lot !

Re: autocad works slower when using an external monitor !?!!?

paullimapa — Mon, 16 Sep 2024 13:22:05 GMT

Did you install 2025.1 update?

Try setting Gfxdx12 to 0 and restart AutoCAD

If still no difference then enter GraphicsConfig and change the 2d Display settings to another selection

Re: autocad works slower when using an external monitor !?!!?

TheCADnoob — Mon, 16 Sep 2024 13:59:55 GMT

Assuming there may be two video cards on board, make sure that you are using the right one

https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/How-to-force-your-laptop-to-Run-with-Graphics-Processor-vs-the-default-Integrated-Graphics-for-InfraWorks.html

Re: autocad works slower when using an external monitor !?!!?

pendean — Mon, 16 Sep 2024 14:13:59 GMT

Is your laptop plugged into it's power brick and the light is on (aka it is getting power from your outlet)?

Which video card is your AutoCAD using as listed in GRAPHICSCONFIG command? Does it change when the other monitor is lugged in?
Do you have the 2025.1 update installed? the program's ABOUT command will confirm.

Did you try an HDMI/DP CABLE instead of an adaptor?

Re: autocad works slower when using an external monitor !?!!?

OGOUN — Mon, 16 Sep 2024 14:27:27 GMT

Thanks to you all for your help..!

First, I made a mistake...I?m still on 2023 and I?m updating to 2025 right now.

I checked in my Graphics Settings and my video card is not recognized !!!!!

So first of all I'll update to 2025 and get back to you !

I just noticed that in my Autocad Graphics Config it seems that no NVIDIA is detected but this card appears in the Device Manager on Windows10.....

Weird !!!

Re: autocad works slower when using an external monitor !?!!?

OGOUN — Mon, 16 Sep 2024 14:38:22 GMT

OK....so I installed 2025 with 2025.1 Update and Autocad don't recognize my videocard with and without external monitor !

This is annoying.

Re: autocad works slower when using an external monitor !?!!?

OGOUN — Mon, 16 Sep 2024 14:41:11 GMT

OK I'm reinstalling the:

NVIDIA RTX / Quadro Desktop And Notebook Driver 537.70

Let's see.....

Re: autocad works slower when using an external monitor !?!!?

paullimapa — Mon, 16 Sep 2024 14:44:32 GMT

And follow instructions in link provided by @TheCADnoob or in bios disable the other graphics driver so os only sees nvidia.

Re: autocad works slower when using an external monitor !?!!?

pendean — Mon, 16 Sep 2024 14:51:53 GMT

@OGOUN Start with the highlighted section here

https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/AutoCAD-uses-the-wrong-graphics-card.html#:~:text=Solution%3A,in%20this%20setup.

Then

https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/AutoCAD-does-not-recognize-the-graphics-card.html#:~:text=Load%20the%20previous,Windows%20Management%20Instrumentation.

Re: autocad works slower when using an external monitor !?!!?

OGOUN — Mon, 16 Sep 2024 14:58:54 GMT

OK I installed the NVIDIA Driver but it still don't recognize. I'll try what you say @pendean !

Re: autocad works slower when using an external monitor !?!!?

OGOUN — Mon, 16 Sep 2024 15:10:29 GMT

OK...I followed the steps and I do have this mentionned message:

Re: autocad works slower when using an external monitor !?!!?

OGOUN — Mon, 16 Sep 2024 15:16:41 GMT

So....must I reinstall Windows ?

Re: autocad works slower when using an external monitor !?!!?

pendean — Mon, 16 Sep 2024 16:00:20 GMT

@OGOUN wrote:
So....must I reinstall Windows ?

If you are sure that is it... No Windows reinstall is often required, you need to ask your IT person/friend/colleague/PC repair shop to activate it if you don't feel comfortable (or not allowed to) doing so yourself https://community.spiceworks.com/t/windows-management-instrumentation-wmi-has-to-be-enabled-via-powershell/952445

and

https://support.auvik.com/hc/en-us/articles/204610500-How-to-enable-WMI-monitoring-on-a-single-Windows-device

Unless this is a server level setting as well, then only your IT can address.

Re: autocad works slower when using an external monitor !?!!?

RSomppi — Mon, 16 Sep 2024 16:32:02 GMT

Don't know if this will help but I recently had to order a Display Port to HDMI cable. During that process, I learned that they are directional. DP to HDMI is not the same as HDMI to DP. Maybe your adapter is directional. This doesn't mean that it won't work at all when installed improperly as there is some 2-way communication.

Re: autocad works slower when using an external monitor !?!!?

OGOUN — Tue, 17 Sep 2024 06:47:37 GMT

Thank's a lot for your help, I'll try this WMI trick or contact my IT and get back here when I have some answers !

Re: autocad works slower when using an external monitor !?!!?

Simon_Weel — Tue, 17 Sep 2024 10:34:12 GMT

If you unplug the external monitor and then look at the Graphics config - does it list which GPU is used?

Re: autocad works slower when using an external monitor !?!!?

OGOUN — Tue, 17 Sep 2024 10:48:14 GMT

No, now even with monito unplugged it did not recognize the Nvidia in Autocad, but it's still appears in the Windows Device Manager.....

Re: autocad works slower when using an external monitor !?!!?

OGOUN — Tue, 24 Sep 2024 12:06:33 GMT

Hi everybody !

I finally fully reinstalled Windows 10 and Autocad 2025 and now my NVidia Quadro RTX 5000 Max-Q is working fine !

Thanks for your help !

Re: autocad works slower when using an external monitor !?!!?

OGOUN — Tue, 24 Sep 2024 12:12:34 GMT

...but now I have another "small" problem that me and some other users had some years ago:

I'll browse topics to see if any solution has been found in the meanwhile !

Re: autocad works slower when using an external monitor !?!!?

OGOUN — Tue, 24 Sep 2024 12:16:53 GMT

Ah !

Rectangle pick box problem can be solved by having tool palettes docked on the left and/or right of drawing window !