Here are my specs,
Windows 10 Professional 64-bit (up to date)
16GB (8x2) HyperX Fury DDR3 1866Mhz RAM
AMD FX 8350 stock clocks
MSI Radeon RX 480 Gaming X 8G (19.5.1 drivers)
MSI 990FXA Motherboard (latest BIOS)
Crysis 3 is still experiencing low GPU utilization and FPS drops down to 17FPS in certain areas, which you can see in the screenshots which I am attaching. This screenshots is in the first mission, part 4 I think, where one just came through the green lazerbeam detection room and look through the windows.
Please note that it is not a CPU bottleneck, since I have tested it with my i5 8400 as well with only achieving 21FPS in this scene. This exact RX 480 was able to achieve 50FPS (100% GPU utilization at 1303Mhz stock clock speeds) in this scene in our old system with Windows 7 Home 64-bit & i5-4670k with early Crimson drivers that was installed for our R9 280X, but worked with the RX 480 with the exact same Very High preset at 1920x1080 resolution.
In addition, the frame rate drop is still present with Radeon Chill disabled.