GTA 5 Performance

Let's start with info about GTA 5 performance.
GTA 5 is really CPU and RAM hungry, many people believe it's not optimized at all, it's not reacting to PC upgrades as much as other games, it can load 4-core CPU to 100% and require more, it can allocate 12GB ram easily, but we still love it and want big and stable FPS, so let's try to get it.

Structure:
- general info about gta performance, ram consumption and cpu hunger
- the reason of stutters, content loading and disk usage
- ssd as pagefile
- hdd defragmentation, data zoning
- ahci mode
- shader caching
- gpu overclocking, occt for error checking

This is draft, do not link it anywhere, do not share it.
When it will be ready - I'll make it available.