Chieftec/Chieftronic Vita BPX-S

750/850W

BronzeATXATX 2.xnon-modular2024

C-Published tier

Why this rating

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

C-Published rating

C-Engine rating

Evidence

74%Limited lab data

PASS: 6
WARN: 3
FAIL: 2
N/D: 11

Architecture

FAIL
Legacy primary topology (DF)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

WARN
ATX 2.x generation platformweight 2
PASS
Full-range input (~100-240 VAC)weight 2

Efficiency

WARN
Bronze class efficiencyweight 2

Components

FAIL
85 degC electrolytic capacitors found (3 year warranty; 85C bulk cap, and not one of particularly good quality, either.)weight 2
3 year warranty; 85C bulk cap, and not one of particularly good quality, either.(editorial note)
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 Andysonweight 1.5
PASS
Platform P37weight 1.5
N/D
No independent laboratory report linked yetweight 2

Warranty and support

WARN
3 year warrantyweight 1.5
3 year warranty; 85C bulk cap, and not one of particularly good quality, either.(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
- — Primary conversion stage: Legacy primary topology (DF)
- — Efficiency certification: Bronze class efficiency
- — Electrolytic capacitor temperature rating: 85 degC electrolytic capacitors found (3 year warranty; 85C bulk cap, and not one of particularly good quality, either.)
- — Too many warnings for this tier (2)
- — Too many failed criteria for this tier (2)
MISSED
Tier B - strong mainstreamspec 12.10
- — Primary conversion stage: Legacy primary topology (DF)
- — Electrolytic capacitor temperature rating: 85 degC electrolytic capacitors found (3 year warranty; 85C bulk cap, and not one of particularly good quality, either.)
- — Too many failed criteria for this tier (2)
MET
Tier C - adequatespec 12.11

Weighted pass ratio 67%, 3 warning(s), confidence 74%

Missing evidence

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

Active power factor correction
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: 750 W850 W
Form factor: ATX
ATX generation: ATX 2.x
Efficiency class: Bronze
AC input: Full range (~100–240 V)
Cable modularity: No
Introduced: 2024

Electrical architecture

What is actually inside, when it is known.

Primary stage: DF
Secondary rectification: SR
Minor rail regulation: DC-DC
Built by: Andyson
Platform: P37

Reviewer notes

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

3 year warranty; 85C bulk cap, and not one of particularly good quality, either.

Warranty length stated in the editorial note3confidence 60%
85 degC capacitors reportednoconfidence 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 293). 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.