Guild Wars 2

Hello,
I have been playing the game since late beta and though I play on a fairly good system I’m afraid I’m having a problem that I’m not certain how to fix. I’ve done the suggested changes in the “FPS issues” sticky and nothing has changed. So I’ve come to ask for any other suggestions (beyond getting a new system because that’s not an option).
My problem is this: about 75-80% of the time I get 60+ fps. In the world, in cities, with large crowds or small, in intense combat with spell effects, etc., it doesn’t seem to matter. However, completely randomly, I will occasionally drop down to 10 or less fps, sometimes as little as 2. It does not appear to be connected to opening my map, nor am I in combat, it happens when I’m alone in a personal instance, when I’m in a city, when I have background programs open and when I do a fresh restart and only open GW2. My significant other plays the game right next to me and he never has this issue, so I know it’s not our internet which means it’s something about my computer.
I’d appreciate any suggestions!
Attached, please find a DXdiag.

Your processor is a Intel® Core™ i7-2720QM CPU @ 2.20GHz (8 CPUs), ~2.2GHz
This CPU will turbo up to 3Ghz for 3 cores.
GW2 is very very CPU intensive and you will encounter drops in fps during certain events or areas in the game.
That being said, I would make sure that you have no other applications eating your CPU resources when you play the game. Make sure that you also have good ventilation for your laptop. Hot CPU’s will throttle.