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Will 2xR9 290 Crossfire work with 750w PSU?

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  • Crossfire
  • Graphics
Last response: in Graphics & Displays
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December 16, 2013 5:20:46 PM

I plan on adding a second R9 290 to my rig, but do not know if my PSU will be able to handle it.

More about : 2xr9 290 crossfire work 750w psu

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December 16, 2013 5:28:22 PM

Power consumption AMD Radeon R9-290

System in IDLE = 128W
System Wattage with GPU in FULL Stress = 372W
Difference (GPU load) = 244W
Add average IDLE wattage ~10W
Subjective obtained GPU power consumption = ~ 254 Watts

Power consumption AMD Radeon R9-290 2-way Crossfire

System in IDLE = 130W
System Wattage with GPU in FULL Stress = 603W
Difference (GPU load) = 473W
Add average IDLE wattage ~20W
Subjective obtained GPU power consumption = ~ 493 Watts
Mind you that the system wattage is measured at the wall socket side and there are other variables like PSU power efficiency. So this is a calculated value not a precise measurement, albeit a very good one.

AMD Radeon R9 290 - On your average system the card requires you to have a 550~600 Watt power supply unit.
AMD Radeon R9 290 Crossfire - On your average system the cards require you to have a 800 Watt power supply unit as minimum.

Source
http://www.guru3d.com/articles_pages/radeon_r9_290_cros...
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