1st Player ACK
850W
Why this rating
Every criterion, its status, and the evidence behind it.
Evidence
- PASS
- 5
- WARN
- 2
- FAIL
- 3
- N/D
- 12
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
- FAIL
Restricted 230V-only inputweight 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
- FAIL
Electrical performance criticised: Although OCP is set reasonably (118% on 12V), the platform is at its limit and cannot handle the increased stress, as ripple gets out of control.weight 3
Although OCP is set reasonably (118% on 12V), the platform is at its limit and cannot handle the increased stress, as ripple gets out of control.(editorial note)
- 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 Hellyweight 1.5
- PASS
Platform ATX-0600T v3.1weight 1.5
- N/D
No independent laboratory report linked yetweight 2
Warranty and support
- N/D
Warranty length is not documentedweight 1.5
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
- — AC input range: Restricted 230V-only input
- — Measured electrical behaviour: Electrical performance criticised: Although OCP is set reasonably (118% on 12V), the platform is at its limit and cannot handle the increased stress, as ripple gets out of control.
- — Too many failed criteria for this tier (3)
- MISSED
Tier B - strong mainstreamspec 12.10
- — Primary conversion stage: Legacy primary topology (DF)
- — Measured electrical behaviour: Electrical performance criticised: Although OCP is set reasonably (118% on 12V), the platform is at its limit and cannot handle the increased stress, as ripple gets out of control.
- — Too many failed criteria for this tier (2)
- MISSED
Tier C - adequatespec 12.11
- — Measured electrical behaviour: Electrical performance criticised: Although OCP is set reasonably (118% on 12V), the platform is at its limit and cannot handle the increased stress, as ripple gets out of control.
- — Too many failed criteria for this tier (1)
- MISSED
Tier D - basicspec 12.12
- — Measured electrical behaviour: Electrical performance criticised: Although OCP is set reasonably (118% on 12V), the platform is at its limit and cannot handle the increased stress, as ripple gets out of control.
- Insufficient evidence, unknown platform or unsatisfactory architecture (spec 12.13)
- Modifiers do not apply to E and F
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
- +12V ripple
- Voltage regulation
- +12V transient response
- Independent laboratory evidence
- Manufacturer warranty
Specification
Values carry the source they came from; unknowns stay unknown.
- Capacities
- 850 W
- Form factor
- ATX
- ATX generation
- ATX 2.x
- Efficiency class
- Bronze
- AC input
- 230V
- Cable modularity
- No
- Introduced
- 2025
Electrical architecture
What is actually inside, when it is known.
- Primary stage
- DF
- Secondary rectification
- SR
- Minor rail regulation
- DC-DC
- Built by
- Helly
- Platform
- ATX-0600T v3.1
Reviewer notes
Free text from the source, used by the engine as signals.
Although OCP is set reasonably (118% on 12V), the platform is at its limit and cannot handle the increased stress, as ripple gets out of control.
- Electrical performance criticised by the reviewernoconfidence 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 8). 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.
Built on the same platform
Different badge, same electrical design.
1st Player
ACK Silver
750/850W
no price yet
- Built by
- Helly
- Platform
- ATX-0600T v3.1
- Introduced
- 2025
- Engine rating
- E(74%)
1st Player
ACK Bronze
650/750W
no price yet
- Built by
- Helly
- Platform
- ATX-0600T v3.1
- Introduced
- 2025
- Engine rating
- D(74%)