Just built an editing machine for Premiere Pro and After Effects (specs below), and although Premiere Pro is running pretty quick, After Effects can barely play ram previews at quarter resolution. It never plays realtime even though the computer I upgraded from could play realtime ram previews on the same project at half resolution. I have messed with every setting and cannot figure it out. I have run multiple benchmarks that show the new setup is a lot faster in every way compared to my old setup.
Any help would be appreciated!
Ryzen 7 1700 (OC to 3.8ghz all cores)
GTX 1070 FTW OC
32gb 3000mhz Corsair LPX DDR4 RAM
250gb NVME 960 EVO
500gb Samsung 850 EVO SSD
H100i water cooling
Old computer setup (runs better in After Effects)
i7 4690k stock frequency
AMD R9 280
16gb 2333mhz Corsair DDR3 RAM
250gb Samsung 850 EVO SSD
500 watt Corsair PSU
Are you using the same monitor? There was a weird issue with certain 4k screens.