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How many watts does a power supply really need to have to power two 7990s?

Tags:
  • Quad Crossfire
  • Power Supplies
  • Tom's Hardware
  • Power
Last response: in Components
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September 21, 2013 6:14:54 PM

I am working on a build with one 7990 but will eventually add in another for quad crossfire but i am not really sure what power supply i need to get. do i need something like a rosewill hercules or could i make do with a 1000w Cooler Master Silent Pro RSA00? how many watts are really required?

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