There has been a recent update to this.
Brent,
Running Crysis Remastered at 4K, starting with the highest quality preset to the lowest while staying in the game, Mission 2 Recovery. Using 16gb Vega FE. When going from the higher preset quality setting to the lower ones, the vram allocation went down each time, in other words the game is not automatically allocating the vram capacity of the video card but appears to be what the game needs.
- "Can It Run Crysis?" took 13gb at 4K, very consistent in the level
- "Very High" took 11.2gb at 4K, very consistent
- "High" took 6.7gb
- "Med" took 4.8gb, this turns off raytracing
- "Low" took 4.4gb, also has no raytracing
The 3080 would not have enough vram at 4K with "Very High" or Can It "Run Crysis?" - I Would expect stalls, stutters at points in the game and would not be smooth.
Raytracing is doing more than just reflections, it does bounce as in GI for color as well as shadows, indoor scenes can be greatly improved in IQ. Digital Foundry did a rundown of raytracing and settings to get 60fps. The presets are really unbalanced, you can get some good IQ and fps with settings. You can run a number of the settings at "Can It Do Crysis?" while others best be on high or even medium.