I got exactly the same problem and now the system always crash after a few minutes running.
Ubuntu 12.10 3.5.0-26 generic
CPU intel core i7 2600
Ram 3x4GB DDRIII
I got exactly the same problem and now the system always crash after a few minutes running.
Ubuntu 12.10 3.5.0-26 generic
CPU intel core i7 2600
Ram 3x4GB DDRIII