topic Archicad lags when I have two or more instances open along with Chrome. in Installation & update

Archicad lags when I have two or more instances open along with Chrome.

Airon — Thu, 07 May 2026 23:36:18 GMT

First, I'd like to apologize if this is not the right place to look for a solution to my problem — I'm new here.

The issue I'm having is the following: when I have two or more instances of Archicad open along with any web browser, the Archicad interface lags — the toolbars and palettes flicker as seen in the video and it takes a long time to respond. This gets worse if I have projects open. Archicad responds normally if I close the web browser I'm using, but this is a problem when I'm in a meeting.

I have tried several browsers — Google Chrome, Edge, Mozilla, and Brave — and the issue persists. It also happens across multiple versions of Archicad: 27, 28, and currently 29.

The PC I work on has the following specs:

Windows 11 Pro

Intel i7-10700K

NVIDIA RTX 3070

32 GB RAM 3600 MT/s

Archicad is installed on an NVMe SSD and I save my files on a separate SSD.

All drivers are up to date, as are the Archicad versions

Lastly, I forgot to mention that I use 3 monitors.

Operating system used: Windows 11 25H2

Re: Archicad lags when I have two or more instances open along with Chrome.

Lingwisyer — Fri, 08 May 2026 01:23:19 GMT

Open the Windows Resource Monitor and see if you are maxing out your RAM. Other than Mozilla, the other browsers mentioned are all Chromium based which tend to have a very liberal on their RAM usage. I have also used over 40GB of RAM with just two models open before...

Ling.

Re: Archicad lags when I have two or more instances open along with Chrome.

Airon — Fri, 08 May 2026 02:49:08 GMT

I am not using all my RAM — as seen in the video, I have two instances of Archicad open with new files and only two tabs open in Chrome. Resources are not the issue.