I recently got battlefield 3, and i get massive lag spikes when i play it, both online and multiplayer. For the first 5 minutes or so, itll be fine (80-100 fps) and after that there will be massive lag spikes every 10 seconds or so. All the settings are on ultra, and msaa is at 2x. The weird thing is that my computer is running it fine, except that it will lag out after 5 minutes and it becomes unplayable. My setup: Windows 7 64 bit. 4 gigs ddr3 ram crucial 2x hd5870 1gb in crossfire EDIT: This also happens when i play it on high settings, so i think its crossfire. My drivers are up to date, so i dont know what to do.