Hey, there! Based on the screenshot you sent, I see that the RAM usage is not the worst, but the power usage might be what’s causing it.
You might want to switch power settings on Windows. (note that if you have a laptop, it will drain the battery faster)
Go to Control Panel > Power Options > select High Performance
If the problem still consists, then maybe one of these will help:
<div>Go to Options > Preferences > Video.Under the Dynamic RAM Preview Max (MB), lower the amount (try 256 MB or lower). This way, it won’t use up too much of your system’s resources when rendering previews. That might affect their quality so if you don’t want that, you can reverse it.
</div>
Lastly you could try enabling GPU acceleration
Go to Options > Preferences > Video.
Under the GPU acceleration of video processing dropdown, ensure you’re using your GPU.