I'd recommend the following:
1. Make sure "Expansion Card Text" option is enabled. This is found in the BIOS, under the "Security" tab.
2. If the problem continues, make sure the wattage on your power supply is compliant; see page 56 of the Technical Product Specification here:
Very Imporant Note, which may be related: The Intel(R) Xeon(TM) Processor W5580 is not a compatible one for the Intel(R) Desktop Board DX58SO; see the following URL: