After Effects Sluggish Preview

Question

Hi,I'm running on a Windows PC with a sluggish preview for a few clip shots (120 fps).  Any ideas on how to fix that?   and     Is it helpful to install CUDA TOOL KIT? Things I have done so far but no result:1. Updated the latest version of the GPU driver.2. I have tried different Video Rendering modes (MGA CUDA and OPEN CL)3. Adaptive Resolution setting 1/8 ===>  Texture memory : 15 Gb4. Empty the disk case / clean media database, and cash 5. Tired of different playback preview spaces, Numb, Alt.... etc6. Max Disk cache size 200Mb7. Memory reserved for AE 58 Gb8. Some minor changes in NVIDIA CONTRol PANEL for AE (not for Global setting) PC SPEC:CPU I9-11900 KRAM 64GB DDR5GPU RTX3090Drive 2 TB SSD with 1 TB free Space(Using HDMI, not Disport)

Sam8888 · Accepted Answer

Thanks, Rick.It was my setting in Nvidia Control panel. But thanks for mentioning the Display refresh rate.

Rick Gerard · Answer

Try skipping a couple of frames. You can find the setting in the Preview Panel. That would make the rendered frame rate faster than a feature film or television in PAL countries. Your computer's display refresh rate is probably only 60 fps. The human eye and brain will see smooth motion in as few as 12 to 18 fps, and the purpose of a RAM preview in a compositing and effects app is to see the blocking, timing, and composition.

YouTube, Vimeo, and social media are going to throttle the frame rate to 30 for most viewers to save bandwidth anyway. Unless you are slowing things down in playback, there's not much of a reason to work in a 120 fps comp.

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