North Bridge Disconnect?

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Gentle People:

   I am developing an optimization application that uses the CPU quite intensely for long periods of time on a CentOS  6.9 machine. Some test runs can run for hours or even days. On a particular test the the OS crashes to a black screen with the message "North Bridge Disconnected"
printed in the upper left.

   The application is carefully designed to not simply consume too much memory and run out, and observation
of the System Monitor confirms this.

   What could be  the cause? Is this a bug in my code, quite possible given the fact that I an still testing and debugging?
Can a bug in a user application get into Kernel space and crash the machine?
Or is it likely a hardware problem on the Motherboard?

Thomas Dineen

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