danpaul88 Messages: 5795 Registered: June 2004 Location: England
Karma:
General (5 Stars)
When its freshly installed there is a good chance a lot of the files are still resident in the RAM standby cache, especially if you have a lot of RAM in your system that isn't being used for anything else.
Whilst an SSD might be fast it's still many orders of magnitude slower than RAM and even after reading the file it needs to unpack it into a game data structure, which requires CPU and/or GPU time depending on the type of file. Textures in particular will typically cause micro-stutters since they have to be loaded before they can be rendered.