Behaviors are complex animations and can put a strain on a weak computer. You could try disabling your graphics card in preferences and see if performance improves. Odds are this will make matters worse. But that's not always the case so it's a good place to start.
These are Camtasia 9's Requirements
System Requirements Camtasia (Windows)
- Microsoft Windows 7 SP1, Windows 8, and Windows 10 (Required: 64 Bit versions only)
- 2.0 GHz CPU with dual-core processor minimum (Recommended: Quad-core i5 processor or better)
- 4 GB RAM minimum (Recommended: 8 GB or more)
- 2 GB of hard-disk space for program installation
- Display dimensions of 1024x768 or greater
- Microsoft .NET 4.6.0 or later version (included)
- Dedicated Windows-compatible sound card, microphone, and speakers (Recommended)
- Windows N requires the MediaFeature Pack for Windows N
Quad-core i5 processor or better
4 GB RAM minimum (Recommended: 8 GB or more
Why they didn't recommend a good graphics card makes no sense at all to me. They gave themselves plenty of wiggle room with the CPU and RAM. Sky's the limit the way I read it "Better/More".
Editing 4K footage is a different ballgame and TechSmith posted some information about that here.
They used a strong computer for that test.
At least they used a GPU. However, a low powered one.
Processor: Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz (8 CPUs), ~3.4GHz
Memory: 16GB RAM
Graphics: NVIDIA GeForce GTX 745
- Display Memory: 12197 MB
- Dedicated Memory: 4035 MB
- Shared Memory: 8161 MB
If you have a high powered rig you can contact tech support for more assistance.
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