Protection Features
| OCP (Normal @ 27.0°C) | 12V: 138.00A (138.00%), 11.982V 5V: 30.7A (122.80%), 5.175V 3.3V: 30.9A (123.60%), 3.296V 5VSB: 4.7A (156.67%), 5.075V |
| OCP (Hot @ 45.0°C) | 12V: 137.00A (137.00%), 11.986V 5V: 30.2A (120.80%), 5.173V 3.3V: 30.4A (121.60%), 3.304V 5VSB: 4.7A (156.67%), 5.077V |
| OPP (Normal @ 29.2°C) | 1521.14W (126.76%) |
| OPP (Hot @ 44.5°C) | 1465.12W (122.09%) |
| OTP | ✓ (130°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 (Damage @ 80V) | ✓ |
| Conducted Emissions EN55032 & CISPR 32 | ✓ |
| NLO | ✓ |
| Fan Failure Protection | ✗ |
| SIP | Surge: MOV Inrush: NTC & Bypass Relay |
The 12V rail’s OCP triggering points are high, given the PSU’s high nominal power. Additionally, the normal and hot 12V OCP triggering points are too close, almost similar. This is also the case for the OCP triggering points of the minor rails, which are also generally high. There is no need for more than 30A at 3.3V in any modern system.
The over-power protection is set correctly, and the rest of the essential protection features are present except fan failure, which is not present in most desktop PSUs (unfortunately).
EMC Pre-Compliance at a Glance
Every electronics device, including PSUs, can be an EMI source, which, depending on the amount of EMI emitted, 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 EMI noise. The corresponding standards for IT (Information Technology) products are CISPR 32 and its derivative EN 55032, which is for products sold in the EU. In the EU, every product featuring the “CE” marking has to comply with the EN 55032 standard. CISPR 32 and EN 55032 standards divide devices into two classes, A and B. B-class equipment is for domestic environments, so their permitted EMI emissions are significantly lower than for A-class devices.
Our equipment for EMI readings:
- Rohde & Schwarz FPC1500 (loaded with all options)
- 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
The PSU’s conducted emissions are in control. There is a small spike over the average detector’s limit, which falls into our measurement uncertainty margin.
Aris would u update Gamemax Lioncore 1000/1200P series, i’ve seen they just had cybenetics platinum ratings
I will review them at some point. Their OEM is doing some serious effort to improve, and I try to help them (as I do with all the other OEMs who send me products for testing)
Love your work but could you in future articles explain every test with simple explanation? I always forget what’s what and have to go to your Tom’s HW reviews to check 😀
For example from the Hold up time segment there: “Put simply; hold-up time is the amount of time that the system can continue to run without shutting down or rebooting during a power interruption.”
If you could mention briefly at the beginning of each test that would be great. If it’s not hassle to paste it every time of course 🙂
I’m still rocking a 2019 Seasonic Focus GX which I picked based on Jonny Guru’s review and I’m afraid that it will die soon so started my research and I’m glad to see that there is a new Guru in the PSU review space so thank you for your work.
Also, your reviews now made me hesitant to buy Seasonic when the time is here lol hopefully they are still reliable even though they are now midrange in these tests
Will see what I can do about that 🙂 Thank you!
I really was hoping für the FSP Mega TI to be next in line…
FSP is still working on this…