Whenever I try to launch battlefield 3 (single or multiplayer, same thing happens for both) from origin or battlelog.com it will say "Joining Server" but the game won't launch, then my computer slowly gets choppier until it freezes up completely. It occasionally does this even before I click a server to join and just going through the battlelog page.
I've tried every solution I could find to similar problems online. I've reinstalled, repaired, updated my drivers, tried disabling my onboard sound, tried disabling SLI, and more and nothing seems to work. This happens with only Battlefield 3.
It's worth mentioning as well that I've played BF3 with no problems with the same video cards and hard drive, I've just recently replaced my mobo, RAM, and processor.
I've tried with each individual stick of RAM but it has the same problem. Could it be a processor thing? Or something running that came with the mobo driver disk? I completely wiped my hard drive before I put this together so I don't think it's an issue there.
Did you reinstal the OS and game after changing the motherboard? I know you said you wiped the drive, but it's hard to tell if you wiped it when you originally built the system or when you changed motherboards.
If you didn't wipe the drive after changing motherboards, I recommend a clean install of the OS and game, at the very least, reinstall the game.