Save Big on AppleiPhone, iPad, MacBook and more. Ends Saturday.Shop now ›

Corsair - CX Series 850W Semi-Modular Power Supply - Black

Build your own computer with this Corsair CX Series CX850M power supply, which is ATX 12V compliant for use with most ATX motherboards and cases. A thermally controlled fan helps dissipate heat while maintaining low noise levels.

Price Match Guarantee

Best Buy is dedicated to always offering the best value to our customers. We will match the price, at the time of purchase, on a Price Match Guarantee product if you find the same item at a lower price at a Designated Major Online Retailer or at a local retail competitor's store.

Here's how:
  • If you find a qualifying lower price online, call 1-888-BEST BUY and direct a customer service agent to the web site with the lower price, or when visiting a Best Buy store, one of our employees will assist you.
  • On qualifying products, Best Buy will then verify the current price to complete the price match.

Exclusions apply including, but not limited to, Competitors' service prices, special daily or hourly sales, and items for sale Thanksgiving Day through the Monday after Thanksgiving. See the list of Designated Major Online Retailers and full details.

Save $6 (Reg. $119.99)
Cardholder Offers

Complete Your Purchase

Corsair - CX Series 850W Semi-Modular Power Supply - Black - Larger Front
Item you are currently viewing
Clearance: $113.99
See details
On Sale: $78.99
Price for both items


What's Included

  • CX Series 850W Semi-Modular Power Supply
  • Owner's manual

Ratings & Reviews

Overall Customer Rating:
96% of customers would recommend this product to a friend (164 out of 171)

Product Features

850W power supply

With 130W maximum output and 25-amp maximum load at 3.3V and 5V, 840W maximum output and 70-amp maximum load at 12V, 9.6W maximum output and 0.8-amp maximum load at -12V and 15W maximum output and 3-amp maximum load at 5Vsb.

Designed for basic system builds and desktop PC upgrades

For reliable, low-noise installation.

ATX 12V v2.3 compliant

Backward compatible with ATX 12V v2.2 and ATX 12V v2.01 for use in most ATX motherboards and cases. A dedicated 12V rail provides compatibility with a wide variety of components.

Thermally controlled fan

Keeps components cool and produces minimal noise.

Over- and under-voltage, over-power and short-circuit protection

To safeguard your system.

80 PLUS Bronze certified

For minimal heat, noise levels and energy consumption.

Semi-modular cable management

Allows you to use only the cables you need.

0.99 Active Power Factor Correction

Promotes clean, reliable power.

100-240V AC input

With input current between 12 and 6 amps and 47-63Hz frequency for wide-ranging use.

Overall Customer Rating

4.7 (171 Reviews)
Product images, including color, may differ from actual product appearance.