CORSAIR CXM Series, CX850M, 850 Watt, Semi Modular Power Supply, 80+ Bronze Certified

Name: CORSAIR CXM Series, CX850M, 850 Watt, Semi Modular Power Supply, 80+ Bronze Certified
Brand: Unbranded
SKU: B00OVCJKWC

Status: CORSAIR CXM Series: Unavailable on Amazon as of 2026-10-06 22:25 UTC. SpecPicks has no in-stock listing with matching specs on file; the search below lists current offers. eBay sellers may still list this model new or used.

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Bottom line: The CORSAIR CXM Series: Semi-modular cabling: attach only the leads your build actually needs; main trade-off: bronze tier trails Gold and Platinum units on efficiency per watt.

Unavailable on Amazon as of 2026-10-06 22:25 UTC

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Currently unavailable on Amazon. Not the same product — 3 in-stock alternatives:

Similar: Redragon RGMS-850W PRO 80+ Gold 850 Watt Power… — $65.99 on Amazon as of 2026-10-07 04:20 UTC (price may vary).

View Current Price — $65.99

Similar: GOLDEN FIELD 850W Power Supply 80+ Gold Full… — $99.99 on Amazon as of 2026-10-06 22:21 UTC (price may vary).

View Current Price — $99.99

Similar: ASUS TUF Gaming 850W Gold — $149.99 on Amazon as of 2026-10-07 04:20 UTC (price may vary).

View Current Price — $149.99

Original listing (currently unavailable) → Compare to similar power supplies

By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-06

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides. About the author →

Pros & Cons

Pros

✓ Semi-modular cabling: attach only the leads your build actually needs
✓ 80 PLUS Bronze, up to 85% efficiency, so less waste heat inside the case
✓ Single +12V rail at 850W feeds modern high-draw GPUs and CPUs
✓ Thermally controlled large-diameter fan stays quiet at idle loads
✓ Extra-long sleeved cables reach PSU-basement mounts in full towers

Cons

✗ Bronze tier trails Gold and Platinum units on efficiency per watt
✗ Three-year warranty is short next to 7-10 year enthusiast PSUs
✗ Semi-modular: the 24-pin and CPU cables stay permanently attached
✗ No native 12VHPWR connector listed for newest GPU power standards

Manufacturer description

CX Series Modular power supply units are an excellent choice for basic system builds and desktop PC computer upgrades, offering high reliability, low noise, easy installation. The flexible modular cabling system lets you use only the cables you need, and 80 PLUS Bronze certified efficiency means less excess heat, lower noise, and lower power bills. The large-diameter, thermally controlled fan makes CX Series Modular quieter at idle, and the large diameter reduces noise even when you're pushing your system hard. And, the matte black finish, black-sleeved cables and black connectors help give…

SpecPicks Verdict

SpecPicks scored CORSAIR CXM Series using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies category. Compare with similarly-priced alternatives in the power supplies category before committing. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for power supplies of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

Modular cabling system lets you use only the cables you need
Built and tested to strict standards for trouble-free installation and smooth operation
80 PLUS Bronze certified efficiency for low noise and lower power bills
Up to 85% energy efficiency means less heat generation and lower energy bills
Universal AC input from 100-240V
A dedicated single +12V rail offers maximum compatibility with the latest components

Full Specifications

Brand	Corsair
Wattage	850 watts
Fan Size	140 Millimeters
Model Name	cx series
Form Factor	ATX12V / EPS12V
Model Number	CP-9020099-NA
Built-In Media	Power supply
Connector Type	ATX
Cooling Method	Air
Item Type Name	Corsair CP9020099NA CX850M Modular Power Supply
Number of Fans	1
Output Wattage	850.0
Item Dimensions	11.4 x 8.5 x 5.1 inches
Mfr Part Number	CP-9020099-NA
Compatible Devices	Personal Computer
Connector Quantity	4
Power Supply Design	Modular
Maximum Input Voltage	240 Volts
Minimum Input Voltage	100 Volts
Item dimensions L x W x H	11.4 x 8.5 x 5.1 inches

Ready to buy?

Amazon shows no buyable offer for CORSAIR CXM Series at the last check. A similar in-stock product is Redragon RGMS-850W PRO 80+ Gold 850 Watt Power…. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

View Similar — $65.99