Hi Tom's Hardware! Since you might already have read the title you know what this is about. My Gigabyte GTX 670 works perfectly fine when watching HD videos or just browsing on the internet. But when i start a game it suddenly crashes(and just before the crash the gfx fans goes to 200% in speed and sound). It doesn't even get past the loading screen. And i've done some testing myself and games where the gpu isn't needed like Minecraft and Terraria the computer runs perfectly fine(though the fans still run at 200%).