Just bought 24GB Ram off a friend, very cheap!! its compatible with my MOBO (sabertooth x58)
But will I see a massive difference to my 8GB?
Standard games no, not at all.
If you are multiboxing multiple game clients like EVE online, then yeah. More RAM you ahve the better.
You will truely see the difference if you do heavy 3d editing, work with massive photoship files or do heavy music editing.
However, 8GB RAM to 24GB RAM, hell 8GB to 100GB zero difference, while a single SSD can cut your boot time and load times down by several seconds to almost instant if the CPU is up to the task.