Corsair HX750 PSU Review

1. Introduction2. Packaging, Contents & Exterior3. Teardown & Component Analysis4. Load Regulation, Hold-Up Time & Inrush Current5. Efficiency, Temperature & Noise6. Protection Features7. Cross-Load Tests & Infrared Images8. Transient Response Tests9. Ripple Measurements10. EMC Pre-Compliance Testing11. Performance, Value, Noise & Efficiency12. Final Analysis13. View All Pages

Protection Features

Our protection features evaluation methodology is described in detail here.

Protection Features
OCP	12V: 74A (118.4%) 5V: 33.7A (134.8%) 3.3V: 34.3A (137.2%) 5VSB: 7A (233.3%), 65mV Ripple
OPP	899.25W (119.9%)
OTP	✓ (145°C @ Secondary Side)
SCP	12V: ✓ 5V: ✓ 3.3V: ✓ 5VSB: ✓ -12V: ✓
PWR_OK	Proper Operation
NLO	✓
SIP	Surge: MOV Inrush: NTC Thermistor & Bypass Relay

The over current triggering points of the +12V, 5V and 3.3V rails are set at normal levels, while at 5VSB OCP activates at a very high load, allowing this rail to exceed the 50mV ripple limit that the ATX spec sets.

Similar to OCP on all rails but 5VSB, the over power protection is reasonable set and OTP is triggered when the temperature on the PSU's secondary side hits 145°C. Finally, there is short circuit protection on all rails.

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