Protection Features
Desktop power supply units (PSUs) include several protection features to safeguard both the PSU itself and the connected PC components (motherboard, CPU, GPU, drives, etc.). These protections prevent damage from electrical faults, overloads, or abnormal conditions.
| OCP (Normal @ 30.0°C) | 12V1: 45.70A (152.33%), 11.897V 12V2: 48.50A (161.67%), 11.694V 12V3: 47.32A (135.20%), 11.762V 12V4: 47.32A (135.20%), 11.762V 5V: 31.3A (130.42%), 5.057V 3.3V: 30.3A (126.25%), 3.27V 5VSB: 4.9A (163.33%), 4.888V |
| OCP (Hot @ 42.1°C) | 12V1: 44.80A (149.33%), 11.889V 12V2: 47.3A (157.67%), 11.792V 12V3: 44.0A (125.71%), 11.789V 12V4: 44.0A (125.71%), 11.789V 5V: 31.6A (131.67%), 5.069V 3.3V: 30.1A (125.42%), 3.264V 5VSB: 4.9A (163.33%), 4.859V |
| OPP (Normal @ 28.7°C) | 1114.42W (131.11%) |
| OPP (Hot @ 44.0°C) | 1083.37W (127.46%) |
| OTP | ✓ (115°C @ Heat Sink) |
| SCP | 12V to Earth: ✓ 5V to Earth: ✓ 3.3V to Earth: ✓ 5VSB to Earth: ✓ -12V to Earth: ✓ |
| PWR_OK | Proper Operation |
| UVP (Full Load @ 90V) | ✓ |
| UVP (No Damage @ 80V) | ✓ |
| Conducted Emissions EN55032 & CISPR 32 | ✓ |
| NLO | ✓ |
| Fan Failure Protection | ✗ |
| SIP | Surge: MOV Inrush: NTC & Bypass Relay |
Evaluating the protection features on multiple 12V rail PSUs is a pain. From now on, I will combine all 12V rails into one and get over this.
The 12V OCP triggering points are set very high at 12V1 and 12V2 because the nominal values are conservative. The rest rails (12V3 and 12V4) have correctly set OCP triggering points, with a significant difference between standard and high operating temperatures.
On the minor rails, the 5V rail’s protection thresholds are not optimally configured, as the OCP point is higher at elevated temperatures than at nominal conditions. Although the rail is conservatively set relative to its rated capacity and the deviation is small, this behavior is enough to prevent the unit from receiving a recommendation badge. In contrast, the 3.3V rail is better tuned; however, its 30A current limit is unnecessary for any modern system, and the difference between normal and high-temperature operation is minimal.
The over-power protection is properly configured, and all other protection features are present and operate as intended. My only criticism is the absence of fan failure protection, which should be a standard feature on a high-end platform.
EMC Pre-Compliance at a Glance
Every electronic device, including PSUs, can be an EMI source, and the amount of EMI it emits can affect the proper operation of nearby devices. EMI can, in some extreme cases, even render them unusable. Some standards have been established to minimize electromagnetic interference (EMI) noise. The corresponding standards for IT (Information Technology) products are CISPR 32 and its derivative, EN 55032, which applies to products sold in the EU. In the EU, every product bearing the “CE” marking must comply with the EN 55032 standard. CISPR 32 and EN 55032 standards categorize devices into two classes: A and B. Class B equipment is intended for domestic environments. Hence, its permitted EMI emissions are significantly lower than those of A-class devices.
Our equipment for EMI readings:
- TBMR-110M EMI-Analyzer DC-110 MHz
- Tekbox TBLC08 LISN
- Tekbox TBFL1 transient limiter
- Tekbox EMCview software
| CISPR 32 / EN55032 Limits | ||
| CISRP 32 / EN 55032 Class A Conducted EMI Limit | ||
| Frequency of Emission (MHz) | Conducted Limit (dBuV) | |
| Quasi-peak | Average | |
| 0.15 – 0.50 | 79 | 66 |
| 0.50 – 30.0 | 73 | 60 |
| CISPR 32 / EN 55032 Class B Conducted EMI Limit | ||
| Frequency of Emission (MHz) | Conducted Limit (dBuV) | |
| Quasi-peak | Average | |
| 0.15 – 0.50 | 66 – 56 | 56 – 46 |
| 0.50 – 5.00 | 56 | 46 |
| 5.00 – 30.00 | 60 | 50 |
| CISRP 32 / EN 55032 Class A 10-Meter Radiated EMI Limit | ||
| Frequency of Emission (MHz) | Field Strength Limit (dBuV/m) | |
| 30 – 88 | 39 | |
| 88 – 216 | 43.5 | |
| 216 – 960 | 46.5 | |
| > 960 | 49.5 | |
| CISRP 32 / EN 55032 Class B 3-Meter Radiated EMI Limit | ||
| Frequency of Emission (MHz) | Field Strength Limit (dBuV/m) | |
| 30 – 88 | 40 | |
| 88 – 216 | 43.5 | |
| 216 – 960 | 46.0 | |
| > 960 | 54.0 | |
Please note that the ATX spec allows a 4 dB margin for conducted and radiated emissions. This means that if a PSU exceeds the limits but stays within the 4 dB margin, it meets the corresponding ATX spec requirement (8.1 Emissions).
EMI Results
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The PSU’s EMI emissions are under control.
Leakage current graph is for the 1000W models so wrong graph used here, too bad your graphs don’t include Pure Power 13 M , that model seems to be a better value and maybe better unit than this.
BQ can snatch loyal Seasonic and Corsair users with these 2025 models, good job from them. Thanks for the review!
Do you think that the Dark Power 14 worth the premium over the Pure Power 13 M?
…in addition, Pure Power has more compact dimensions 160 vs 175 (Dark Power) and fits into e.g. Lancool 207, or Sugo 14, while Dark Power does not 😉