Stuttering, Freezing and Crashing in Northrend (Lordaeron)

I've got a lot of issues in Northrend so far where suddenly when playing there's insane amounts of frame drops and after filtering through endless amounts of troll comments in /global I found out that it's some sort of ram glitch or something like that so I tried to patch the exe with a large aware adress to allow for more than 2gb ram to be used and that seems to have done the trick for a lot of people in-game but it did NOTHING for me. My computer is only a few years old and I have 16gb ram so I don't really think my computer is the problem. Disabling my addons doesn't do anything either... Any other tips? It's becoming bad enough that I'm considering quitting.