|Unless I am missing something here, the PSU posted above does not have an 8 pin CPU power connector.|
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The specs on newegg (the link you posted above) confirm the same: 1 x 4-pin CPU.
But, what it does have is an 8 pin (6-2) PCI-E connector, which in no way can replace the 8 pin CPU connector. (but you might be using that one instead)
To verify which one you are using, check the wire colors of the connector. If it is the right one, four wires should be black, and four yellow. Please post back with the results.
Important: DO NOT power up the system until you verify that you are using the right connector. Doing so might can your system!
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