Or as low as 
Corsair RM850e 850W 80 Plus Gold Fully Modular ATX PSU
FULLY MODULAR CABLING
Keep cable clutter down by connecting only the cables your system needs and nothing else. Five universal 8-pin connectors can be used with any 8-pin cable, satisfying all the power needs of modern motherboards and GPUs.
TUNED FOR LOW NOISE OPERATION
A 120mm rifle bearing fan with a specially calculated fan curve keeps fan noise down, even when operating at full load.
With Zero RPM Fan Mode for near-silent operation at lower loads.
TECHNOLOGY AND RELIABILITY
For consistent, reliable power and superb electrical performance, each RMe Series power supply features a robust resonant LLC topology with DC-DC conversion and 105° rated industrial-grade capacitors.
With precise timings, RMe supports Modern Standby, ensuring extremely fast wake-from-sleep times and better low-load efficiency.
80 PLUS GOLD-CERTIFIED
Steady power output at up to 90% efficiency, and Cybenetics Platinum certified for lower power consumption, less noise, and cooler temperatures.
