6
According to the manual it is required to use both.
According to the manual it is required to use both.
My guess with that TDP is yes. Iirc it's about 100W per connector.
I ran similar dual processors, each with a single x4 connector, while waiting for a conversion kit to turn one of my PCIe connectors into another set of plugs. It ran fine, but it's not officially recommended by my motherboard vendor, and I probably wouldn't have done it long-term. All that is to say that YMMV.