The i7-4930K is not compatible with the DX79TO motherboard: Compatible Processors
While it may physically fit the LGA2011 socket, there are other considerations regarding its operation. Most importantly, the BIOS needing to be upgraded to support the i7-4930K, which is not likely to happen.
You may want to review this thread: https://communities.intel.com/message/236388#236388
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