Seasonic Focus GX-1000 V4 ATX v3.1 PSU Review

Protection Features

OCP (Cold @ 25.3°C) 12V: 112.00A (134.94%), 12.033V
5V: 33.2A (132.80%), 5.02V
3.3V: 35.4A (141.60%), 3.315V
5VSB: >6.2A (>206.67%), 4.79V*
*Didn’t shut down
OCP (Hot @ 44.2°C) 12V: 106.20A (127.95%), 12.046V
5V: 31.7A (126.80%), 5.022V
3.3V: 34.2A (136.80%), 3.316V
5VSB: 6.3A (210.00%), 4.768V
OPP (Cold @ 26.3°C) 1347.09W (134.71%)
OPP (Hot @ 41.7°C) 1197.04W (119.70%)
OTP ✓ (140°C @ 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 & Bypass Relay

The 12V OCP triggering point is higher than 130% at cold conditions but drops notably at high temperatures. The minor rails also have notably lower OCP triggering points at high temperatures, but in general, the triggering points are set high, especially on the 3.3V rail. The same is the case for 5VSB, where OCP exceeds 200%!

The Over Power Protection is set pretty high at low temperatures but drops significantly at high temperatures to protect the PSU effectively. All other primary protection features are present, but Fan Failure Protection should be implemented, especially since an MCU controls the fan.

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4 thoughts on “Seasonic Focus GX-1000 V4 ATX v3.1 PSU Review

  1. Thank you for the great review! I’m personally waiting for the ATX3.1 compliant Vertex PX-1200. But a sales rep from Seasonic told me those are currently only available in Asians markets at the time. Do you maybe have an estimate when the ATX3.1 versions of the Vertex series become available in the EU?

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