I changed everything I could in windows settings to high performance, same in the nvidia control pannel.The game is running on 'performance' graphics settings, which mean everything is on lowest possible, post processing : none.Note that before I had the issue, all those windows/nvidia settings were still on default mode and gw2 was running with more than decent graphics.If it was the HDMI, or any hardware issue (?) it would cause problems when I play other games right ? I'm mentioning SAB area because it seem to be the place where I'm guaranteed to crash within 2 minutes. Same goes for any strike mission that isn't in Sanctum Arena, sometimes I happened to crash after boss was killed in shiverpeak pass, and it seems like I can crash anywhere near the end of Forging steel. As I mentioned I was able to play for 3+ hours straight when staying on Eternal Battlegrounds, with tri factions big zergs around, only to crash 1 minutes into a solo SAB instance. Also any PvP game => crashes. After two weeks exchanging with the CS, my computer has never been so fast to start, there is literaly not a single other program or service running when I start the game, yet it still turns off my monitor at some point, like graphic driver were no longer responding or something. I'm pretty sick of rebooting my PC all day long, I just want to play the game that has been working mighty fine for 5+ years