Guild Wars 2

Hello all, i had the same problem as you guys. It start 1 month ago, 10-15 min playing either a dungeon or pvp or sometime pve and wvw, my gpu crashed. It starts with a driver crash (blackscreen) then recover to the desktop, then i had no signal (must turn off and reset the pc). I have found the solution for my problem, i hope this gonna works for you:

1- clean up your pc, there was alot of dust in my fans and on my gpu and processors. (was crashing with 15 min of gameplay before, now with 45 min)
2- i use min. settings in gw2 (dunno if it really changes something)
3- then i used this software (MSI Afterburner) to underclock my gpu (gtx 285)

original settings underclock settings
core clock: 666 core clock: 571
shader clock: 1512 shader clock: 1296
memory clock: 1242 memory clock: 1149

for the moment with this setting, i had no crash while playing gw2 for 5h. I wish really hard this gonna help you with your problem, i know how it’s frustrating. Btw its the only game that crash my gpu.

link for MSI Afterbuner: http://event.msi.com/vga/afterburner/download.htm