Oscar, think of RAM as the top of your "desk" where you are doing your work.
If you have a very small "Desk" (less RAM) you cannot keep as many items up there. This means you have to go back and forth to stacks or materials elsewhere in your "office", or back and forth in "file cabinets". This is the kind of disk activity that goes on behind the scenes, as your computer works to put in front of you the things you need at the moment.
A Bigger "desk" (more RAM) means you can keep more things in easy reach - less going back and forth. Faster access.
Your operating system is the muscle, the lifeblood in your system. More RAM means more muscle from your OS as well as more room for your applications. Overall performance improves.
Dell Precision T7600 (x2)
Win 7 64-bit
Adobe CC 2014 (as of 7/2015)
256GB SSD system drive
4 internal media drives RAID 5
Typically cutting short form from HD MP4 and P2 MXF.