A month ago I was faced with a Logicboard problem. It turns out that it’s been a known issue for some time. My work around was to manually set the fan control (away from the logic board) and use a software to force the video card into integrated only mode. For those with similar issues, you should get a call by Apple or bring your mbp to have it checked. My mac wasn’t listed on their system so I would not have been notified of this issue so it’s better to check up the situation for yourself.
http://www.apple.com/support/macbookpro-videoissues/