Guild Wars 2

Hi, me and my girlfriend are having some crash during big fight in WvW (especially in eotm).

For exemple, I lead my zerg (around 30-40 people) against a big zerg (around 60-80 people), I have a crash most of the time.

If I play in fullscreen the GW2 screen stay on the top of my screen, can’t force quit the game even with ctrl + alt+ del or alt+F4, can’t do anything except doing physical hard reboot on my computer… If I play fullscreen window mode, the game just crash and the error window close in less than 1 second (so can’t see crash report) but I can use my computer so I launch again GW2. Same thing for my girlfriend except she crash 5 seconds after me.

We have nearly the same component in our computer :

Me :
intel I7 4770k
nvidia GTX 980
16Go RAM
Z97
Windows 7

my GF :
intel I7 4770k
nvidia GTX 970
16Go RAM
Z97
Windows 7

My GF’s computer is fully updated (windows, nvidia + other drivers)
My computer was not updated, I updated my drivers, nvidia and windows : it’s still crashing.

I tryed switching my ingame graphics options, don’t see any changes.

I had lot of crash with my old AMD R9 290 gaming, but now that I have switched to GTX 980, haven’t had any crash for the last year until now, same for my GF who switched from a GTX 780 kitten a GTX 970, crashes come from the last update (HoT)