High CPU usage when typing a message in Outlook

So far, I cannot cause the GPU to spike. I tested switching mail to calendar and otherwise. Does this happen on the primary monitor or is it secondary or does it matter?

In the past when we looked into graphics issues engineers would get a DXDiag report, Which version of DirectX is on your PC? - Microsoft Support. This will show you the driver date which could help indicate if the driver is old and needs to be updated.

Another thing to test if it would help is the option File, Options, General, User interface options, Office support for high definition displays - Microsoft Support. Test with best appearance and optimize for compatibility.

I only use an external monitor (2.560x1.440), and my integrated display (which I don't use in dock) has the same resolution.

According to DXDiag, I have DirectX 12, the main driver is dated 20210820, and no problems had been detected.

I'm quite sure that it's not a question of versions, options etc., because 2405 has not this bug, but later versions have.

Hi all,

The CPU spike fix is now available in the Beta Channel (Version 2505 Build 18827.20006). If you are able to switch to the Beta Channel to test, please do. The Word Team will backport the fix to the other channels, and I will post back with those specifics once I get them and will update the Known Issue as well, CPU spikes when typing in classic Outlook for Windows - Microsoft Support.

Simplest steps to switch to the Beta Channel:

Use a registry key to Beta Channel. For more information, go to Use a registry command to install Microsoft 365 Insider on Windows device.

1. Open a Command Prompt window with Run as administrator for Administrator context.
2. Paste the command below and press Enter:

reg add HKLM\Software\Policies\Microsoft\office\16.0\common\officeupdate /v updatebranch /t REG_SZ /d BetaChannel 3. After you add the registry key, select File> Office Account > Update Options, then Update Now to initiate the switch to Beta Channel.

I only use an external monitor (2.560x1.440), and my integrated display (which I don't use in dock) has the same resolution.

According to DXDiag, I have DirectX 12, the main driver is dated 20210820, and no problems had been detected.

I'm quite sure that it's not a question of versions, options etc., because 2405 has not this bug, but later versions have.

All of my machines are on DirectX 12 as well. The oldest driver I have is from 2024. Please double check there is not something newer. Switch to the Beta Channel and test with the Word fix if that has any affect on the GPU issue. When you are on the Beta Channel you should be able to submit an In App ticket (Help, Contact Support). I would do that and see if the In App support can identify any causes for the GPU spike. Since you already have it I would attach the DXDiag report.