be quiet! Power Zone 2 850W ATX v3.1 PSU Review

Protection Features

OCP (Normal @ 24.3°C) 12V: 93.60A (132.20%), 12.165V
5V: 29.7A (148.50%), 5.06V
3.3V: 28.1A (140.50%), 3.312V
5VSB: 4.8A (160.00%), 4.898V
OCP (Hot @ 40.0°C) 12V: 89.20A (125.99%), 12.165V
5V: 29.5A (147.50%), 5.056V
3.3V: 28.1A (140.50%), 3.314V
5VSB: 4.7A (156.67%), 4.898V
OPP (Normal @ 25.8°C) 1232.66W (145.02%)
OPP (Hot @ 41.5°C) 1152.66W (135.61%)
OTP ✓ (142°C @ Secondary Side)
SCP 12V to Earth: ✓
5V to Earth: ✓
3.3V to Earth: ✓
5VSB to Earth: ✓
-12V to Earth: ✓
PWR_OK Proper Operation
NLO
Fan Failure Protection
SIP Surge: MOV
Inrush: NTC & Bypass Relay

OCP at 12V is appropriately set, but I find it too high on the minor rails, mostly at 3.3V, where there is no need for such high Amps. Moreover, the difference between normal and hot OCP on the minor rails is low at 5V and does not exist at 3.3V. At high temperatures, the PSU gets stressed more, so OCP should normally be lower.

OPP is highly set at normal conditions; the same is true for hot ones. At least the difference between these two is significant at 9.41%. All other essential protection features are present, and soon enough, I will add more to my test sessions.

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