Corsair CX-m 2025 (Black Label, ATX 3.1)

650/750W

BronzeATXATX 3.xFull modular2025

B-Published tier

Why this rating

Every criterion, its status, and the evidence behind it.

B-Published rating

BEngine rating

Evidence

74%Limited lab data

PASS: 9
WARN: 1
FAIL: 0
N/D: 12

Ratings disagree by 1 step

The engine rates this unit higher than the imported list, usually because the list de-tiers units that lack independent testing while the engine records that as low confidence instead.

Architecture

PASS
Resonant primary stage (LLC)weight 3
PASS
Synchronous rectificationweight 2
PASS
Independent DC-DC converters for +5V and +3.3Vweight 3
N/D
PFC type is not documented; APFC assumed only when statedweight 2

Standards

PASS
Declares ATX 3.x complianceweight 2
PASS
Full-range input (~100-240 VAC)weight 2

Efficiency

WARN
Bronze class efficiencyweight 2

Components

N/D
Capacitor temperature rating is not documentedweight 2
N/D
Fan bearing type is not documentedweight 1.5

Protections

N/D
Protection set has not been verified independentlyweight 3
N/D
OCP declaration has not been verifiedweight 2
N/D
OTP declaration has not been verifiedweight 1.5
N/D
Protection trip points have not been measuredweight 2

Electrical performance

N/D
No qualitative electrical assessment on recordweight 3
N/D
No ripple measurement on recordweight 3
N/D
No voltage regulation measurement on recordweight 2
N/D
No transient response measurement on recordweight 2

Evidence

PASS
Built by HECweight 1.5
PASS
Platform Customweight 1.5
N/D
No independent laboratory report linked yetweight 2

Warranty and support

PASS
7 year warrantyweight 1.5
Uses semi-digital PFC, 7 year warranty.(editorial note)

Safety

PASS
No safety incidents or false claims on recordweight 3

How the tier was reached

MISSED
Tier A - reference classspec 12.9
- — Efficiency certification: Bronze class efficiency
MET
Tier B - strong mainstreamspec 12.10

Weighted pass ratio 95% with 1 warning(s)

Missing evidence

These criteria could not be resolved. They lower the confidence index rather than count against the unit.

Active power factor correction
Electrolytic capacitor temperature rating
Fan bearing type
Protection coverage
Over-current protection declared
Over-temperature protection declared
Protection trip points
Measured electrical behaviour
+12V ripple
Voltage regulation
+12V transient response
Independent laboratory evidence

Specification

Values carry the source they came from; unknowns stay unknown.

Capacities: 650 W750 W
Form factor: ATX
ATX generation: ATX 3.x
Efficiency class: Bronze
AC input: Full range (~100–240 V)
Cable modularity: Full
Introduced: 2025

Electrical architecture

What is actually inside, when it is known.

Primary stage: LLC
Secondary rectification: SR
Minor rail regulation: DC-DC
Built by: HEC
Platform: Custom

Reviewer notes

Free text from the source, used by the engine as signals.

Poor ripple suppression on the minor rails. Uses semi-digital PFC, 7 year warranty. Can get loud (in excess of 40dbA) under heavy load.

Warranty length stated in the editorial note7confidence 60%

Where this data comes from

Each field records which source supplied it and how sure we are.

Field	Source	Confidence	Captured
oem	PSU Tier List (seed workbook)trust 70	70%	workbook import
intro_year	PSU Tier List (seed workbook)trust 70	70%	workbook import
modularity	PSU Tier List (seed workbook)trust 70	70%	workbook import
atx_version	PSU Tier List (seed workbook)trust 70	70%	workbook import
form_factor	PSU Tier List (seed workbook)trust 70	70%	workbook import
input_range	PSU Tier List (seed workbook)trust 70	70%	workbook import
platform	PSU Tier List (seed workbook)trust 70	70%	workbook import
editorial_tier	PSU Tier List (seed workbook)trust 70	70%	workbook import
efficiency_class	PSU Tier List (seed workbook)trust 70	70%	workbook import
primary_topology	PSU Tier List (seed workbook)trust 70	70%	workbook import
minor_rail_regulation	PSU Tier List (seed workbook)trust 70	70%	workbook import
secondary_rectification	PSU Tier List (seed workbook)trust 70	70%	workbook import

Primary source: PSU Tier List (seed workbook) (row 380). Community-maintained tier list imported as the seed data set. Ratings from this source are shown as the published tier; the Tier Engine computes its own rating separately.