Efficiency meets 80 PLUS requirements:


Efficiency under different load profiles:


The Corsair CX400W lives up to the 80 PLUS certification conditions, though it only just manages to reach the minimum requirement of 80% efficiency at 20% and 100% of the maximum 115 V load.
At 230 V, the results are naturally a bit higher. Its efficiency does deteriorate rather severely under light loads, though. At 25 W, it is just 69% (115 V) and 70% (230 V) respectively.
Other measurement results are loosely within the ATX specifications, and the hold-up time of 35 ms is particularly good. The very low temperature increase of just two degrees under load is also noteworthy. However, the CX4000W does have the highest inrush current of all the tested PSUs, with more than 63 A at 230 V.
- PSUs At A Reasonable Price
- Corsair CX400W
- Corsair CX400W: Measurements
- FSP Saga II 400
- FSP Saga II 400: Measurements
- Huntkey Jumper 450B
- Huntkey Jumper 450B: Measurements
- Xigmatek NRP-PC402
- Xigmatek NRP-PC402: Measurements
- Test Configuration And Short Circuit Tests
- Antec EA-380D Green
- Antec EA-380D Green: Measurements
- Chieftec BPS-450S
- Chieftec BPS-450S: Measurements
- Enermax PRO82+ II (425 W)
- Enermax Pro82+ II: Measurements
- Test Configuration And Short Circuit Tests
- Hold-Up Time, Inrush Current, And Peak Load Tests
- Efficiency In Accordance With 80 PLUS Specification, Temp., And Standby Power
- Load Profiles Efficiency Overview
- Conclusion And Recommendations
Looking at the picture and the fan alignment it seems otherwise.
While your tests show that these PSU's perform up to or even above their power output specs, that's not the whole story. You say you have an oscilloscope, but where are it's readings across all those load tests? What about voltage fluctuation measurements across them as well?
I just think you're capable of providing more thorough tests and results.
Oh, and it was interesting to see a real PSU blow up
Looking at the picture and the fan alignment it seems otherwise.
great video, Ive always wanted to see a PSU explode lol.
Looking at the picture and the fan alignment it seems otherwise.
While your tests show that these PSU's perform up to or even above their power output specs, that's not the whole story. You say you have an oscilloscope, but where are it's readings across all those load tests? What about voltage fluctuation measurements across them as well?
I just think you're capable of providing more thorough tests and results.
The initial request makes me think these were cherry-picked, rather than selected from a Retail source. That bodes particularly poorly for AXP; looks like they should not be legal for sale.
If you doubt this, try using a kill-a-watt meter or equivalent. Most mainstream PC's idle lower than 100, and max lower than 250.