Now you've got me confused..... as the thread, that Lysrin linked to, mentioned, the CPU power should be 4 or 8 pin, so why are you talking about 6pin PCI-E, when you're wondering about checking the board with a particular CPU?
You might be able to use 4pin CPU power in the right most socket at the top of the CPU. I'm not sure it's advisable to run any heavy loads in that state though as you probably won't really be supplying enough power to the CPU. If you just need to quickly test the board functionality though, you might be okay.
The socket below the PSU looks to be for PCIe 6pin power, likely to give more power to the PCIe slots when running triple GPUs.
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