Protection Features Evaluation
Protection Features |
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OCP | +12 V: 79.4 A (127.04%), 11.968 V +5 V: 28.8 A (130.91%), 5.043 V +3.3 V: 30.3 A (137.73%), 3.294 V 5VSB: 5.1 A (170%), 4.977 V |
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OPP | 936.51 W (124.87%) |
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OTP | Yes (126 °C @ +12 V heat sink) |
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SCP | +12 V: Yes +5 V: Yes +3.3 V: Yes 5VSB: Yes -12 V: Yes |
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PWR_OK | Proper Operation |
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NLO | Yes |
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SIP | Surge: MOV Inrush: NTC & Bypass Relay |
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With the only exception of the 3.3 V rail, OCP is correctly set in general. The same goes for OPP, which is conservatively set, below 130%. It is nice to see ATX v3.0 PSUs, which can deliver 200% of their max-rated capacity for short periods if required, with adequate operating protection features.
DC Power Sequencing
According to Intel's most recent Power Supply Design Guide (revision 1.4), the +12 V and +5 V rails must have voltages equal to or greater than the +3.3 V rail's output at all times. We turn the unit off for our first measurement and switch it back on without a load on any of the rails.
The 3.3 V rail is always lower than the other two rails.
EMC Pre-Compliance Testing - Average and Peak EMI Detector Results
Electromagnetic Compatibility (EMC) is the ability of a device to operate correctly in its environment without disrupting the proper operation of other close-by devices.
Electromagnetic Interference (EMI) stands for the electromagnetic energy a device emits, and it can cause problems in other close-by devices if it is too high.
Several spurs go over the limits with the average EMI detector, and I also found three exceeding the limits with the peak EMI detector.