In the top-right corner of Corsair's attractive packaging we find the rather subtly displayed 80 PLUS logo. The 400 W PSU contained within is safely swaddled in bubble wrap, though the rest of the package's items are floating free. In addition to the PSU and power cord, Corsair includes screws and a handful of cable ties.
The PSU itself feels solid. The cables aren't modular, but they are fully wrapped in mesh sleeves and are of adequate length. Having six Molex and SATA connectors places Corsair at the head of this group when it comes to available connectivity. Plus, you get the ATX and +12 V auxiliary CPU cables, as well as a single 6-pin PCIe connector. The single 12 V rail can handle currents of up to 30 A.
| Corsair CX400W | ||||||||
|---|---|---|---|---|---|---|---|---|
| AC Input | 90-264 V, 47-63 Hz | |||||||
| DC Output | +3.3 V | +5 V | +12 V (#1) | +12 V (#2) | +12 V (#3) | +12 V (#4) | -12 V | +5 Vsb |
| 20 A | 20 A | 30 A | n/a | n/a | n/a | 0.8 A | 2.5 A | |
| Individual Output | 9.6 W | 2.5 W | ||||||
| Rail Utilization | Sys | Sys | CPU And VGA | |||||
| Combined Output | 130 W | 360 W | ||||||
| Total Continuous Output | 400 W | |||||||
| Peak Output | 440 W | |||||||
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Summary
- 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
Ask a Category Expert



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.