Why PowerPoint Uses Low CPU When Deleting Slides or Exporting MP4
Question details
The user experiences unusually long processing times when deleting multiple slides or exporting presentations to MP4 format, despite system resource monitors showing low overall CPU, GPU, memory, and SSD usage.
- Product
- Microsoft PowerPoint
- Device & OS
- not provided
- Scenario
- Deleting multiple presentation slides or rendering a presentation file into an MP4 video.
- Observed behavior
- The operation takes a very long time to complete while average CPU usage remains low, though individual processor cores may briefly spike to high usage.
Ensure your Windows operating system and Microsoft Office installation are fully updated to the latest versions before troubleshooting performance issues.
Check Office Architecture and Optimize Single-Core Processing
Understand how PowerPoint utilizes CPU cores and verify that you are running the optimal 64-bit version of Office for better hardware utilization.
PowerPoint often relies on a single processor core for sequential tasks like exporting MP4 videos or deleting complex slides. Because only one core works at full capacity while others remain idle, your overall system CPU usage appears deceptively low.
Running the 64-bit version of Office allows the application to access more system memory and better utilize modern hardware architectures compared to the legacy 32-bit version.
Launch PowerPoint, create a blank presentation, and click on 'File' in the top-left corner. Select 'Account' at the bottom of the left sidebar.
Click the 'About PowerPoint' button. In the window that appears, look at the top line to see whether your installation is labeled as 32-bit or 64-bit.
If you are running 32-bit Office on a 64-bit operating system, uninstall your current Office suite and reinstall the 64-bit version from the Microsoft portal for improved performance.
Reduce Presentation Complexity and Embedded Media
Minimize the load on the rendering engine by simplifying complex animations and compressing heavy media files.
Experience Faster Presentations with WPS Office
If you frequently struggle with slow video exports or sluggish slide editing in PowerPoint, try WPS Office. It is a highly optimized, lightweight alternative that handles complex presentation tasks smoothly without straining your system resources.
- 1. Download WPS Office: Visit the official WPS website and download the free installation package.
- 2. Install the Software: Run the downloaded installer and follow the simple on-screen instructions to set up WPS Office on your computer.
- 3. Open Your Presentation: Launch WPS Presentation and open your existing .pptx files to enjoy faster editing and exporting capabilities.
Frequently Asked Questions
Can I force PowerPoint to use all CPU cores?
No. PowerPoint's core rendering engine relies on single-thread processing for certain sequential tasks, like video encoding or processing complex object deletions. You cannot force the application to use all CPU cores simultaneously.
Will upgrading my graphics card speed up PowerPoint MP4 exports?
Not significantly. PowerPoint primarily relies on your CPU for exporting MP4 files. While hardware acceleration helps with on-screen slide rendering, a new GPU will not drastically decrease video export times.
Why does deleting a single slide sometimes freeze the application?
Deleting a slide can cause freezing if it contains high-resolution embedded media, complex overlapping animations, or linked data from other applications (like large Excel charts) that take time to detach from the presentation file structure.
