Thermaltake Toughpower GF A3 750W PSU Review

Protection Features

OCP (Cold @ 26°C) 12V: 94.8A (151.68%), 11.968V
5V: 27A (135%), 5.013V
3.3V: >30A (>150%), <3.28V
5VSB: 4.7A (156.67%), 4.837V
OCP (Hot @ 43°C) 12V: 87.6A (140.16%), 11.864V
5V: 26.8A (134%), 5.013V
3.3V: 29.7A (148.5%), 3.278V
5VSB: 4.4A (146.67%), 4.841V
OPP (Cold @ 27°C) 1123.02W (149.74%)
OPP (Hot @ 40°C) 971.52W (129.54%)
OTP ✓ (108°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

OCP is highly set at 12V in cold conditions, dropping at around 140% at high temperatures. Given the 750W max power, I agree with this setting, so that I won’t mark it as negative. OPP is also close to 150% at low temperatures but drops notably at high temperatures, effectively protecting the PSU. The 5V rail has its OCP triggering point logically set, but this is not the case for the 3.3V rail, which exceeds 30A without triggering!

OTP triggers at a relatively low temperature on the 12V heatsink, but this makes perfect sense since the latter doesn’t directly contact the 12V FETs. Lastly, all other essential protection features are present.

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