I've updated to OS X 10.8.5; My Powercore PCI/ PCI Express card has stopped working. Why?
OS 10.8.5 breaks the PCI memory window distribution, and as a result the driver unloads.
This is a bug that Apple needs to address and unfortunately it's not something we're able to provide a 'software workaround' for. For further information please follow this thread in the PowerCore forum.