Each die has an independent voltage controller and 12V input, so you can run whatever power supply configuration you want. Even if you have a server power supply with a higher 13V input voltage and an ATX one with a 12V output, you could run them together without contention.
How much current will each die be pulling? i.e. a power supply has to be able to supply at least XXA or XXXW, or a multiple there of . . .
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