RAM Playback is still slow on 4K GUI
I have noticed there are several bug reports regarding the unsufficient RAM playback on 4K GUI, e.g. https://adobe-video.uservoice.com/forums/911311-after-effects/suggestions/36926725-ram-preview-plays-back-slow-on-4k-monitor-unless-i
This is still definitely an issue on the latest AE 2021 18.4.0, on Windows 10 64-bit, UHD 620 integrated GPU.
RAM playback seriously frame drops on 4K full screen > drop AE to the corner to resize the complete AE UI to 1920 x 1080 > RAM playback is realtime again!
Please improve this.