Deepcool PQ850G ATX v3.1 PSU Review

Protection Features

OCP (Cold @ 27°C) 12V: 84.4A (120.57%), 12.165V
5V: 29.9A (149.5%), 5.013V
3.3V: 30.1A (150.5%), 3.249V
5VSB: 4.1A (164%), 5.048V
OCP (Hot @ 43°C) 12V: 80.6A (115.14%), 12.174V
5V: 29.5A (147.5%), 5.013V
3.3V: 29.8A (149%), 3.248V
5VSB: 4.1A (164%), 5.044V
OPP (Cold @ 25°C) 1083.05W (127.42%)
OPP (Hot @ 43°C) 1018.02W (119.77%)
OTP ✓ (165°C @ +12V Heat Sink)
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 Thermistor & Bypass relay

The 12V rail’s over current protection is conservatively set under all conditions, which is good. Moreover, the over power protection is set correctly, with a notable difference between cold and hot conditions, so the PSU is effectively protected. As in the 1200W and 1000W units, OCP is sky-high on the minor rails, and the difference in the triggering points between cold and hot conditions is low.

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