What is the efficiency rating of this Gold Medal power supply, and how does it impact energy consumption?

The efficiency rating of this Gold Medal power supply is over 90%, and it is 80 PLUS GOLD Certified.

Is this power supply compatible with both the 4090 and 7900 series graphics cards simultaneously?

Yes, this power supply supports both the 4090 and 7900 series graphics cards.

Questions & Answers: Great Wall 850W White Limited Edition ATX Power Supply, Gold Medal Full Module Power ,0.01ms Speed Response,Fan Automatic Start Stop,140mm Mute Big Fan ,Support 4090 ,7900 Series Graphics Card

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Corn Electronics
Item#: 9SIA4REJT89644
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Great Wall 850W White Limited Edition ATX Power Supply, Gold Medal Full Module Power ,0.01ms Speed Response,Fan Automatic Start Stop,140mm Mute Big Fan ,Support 4090 ,7900 Series Graphics Card

ATX
Full Modular
80 PLUS GOLD Certified
100 - 120 V / 200 - 240 V 47 - 63 Hz

$263^.38 –