Antec TruePower Classic Series 750 W Review

Name: Antec TruePower Classic Series 750 W
Brand: Antec

crmaris

on Feb 7th, 2014,

in Power Supplies.

Manufacturer: Antec

Performance Rating, Performance per Dollar, Noise & Efficiency Rating »

Ripple Measurements

You will see the ripple levels that we measured on the main rails of the TP-750C in the following table. The limits are, according to the ATX specification, 120 mV (+12V) and 50 mV (5V, 3.3V, and 5VSB).

Ripple Measurements - Antec TP-750C
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
20% Load	13.1 mV	6.9 mV	10.3 mV	8.2 mV	Pass
40% Load	20.1 mV	7.8 mV	12.1 mV	11.4 mV	Pass
50% Load	24.8 mV	8.8 mV	13.7 mV	13.2 mV	Pass
60% Load	30.1 mV	16.9 mV	13.9 mV	15.0 mV	Pass
80% Load	41.3 mV	25.0 mV	17.6 mV	18.3 mV	Pass
100% Load	56.1 mV	29.1 mV	22.6 mV	23.3 mV	Pass
110% Load	76.3 mV	32.2 mV	25.6 mV	26.6 mV	Pass
Crossload 1	12.9 mV	8.3 mV	12.7 mV	12.8 mV	Pass
Crossload 2	57.5 mV	26.9 mV	21.4 mV	22.4 mV	Pass

Seasonic PSUs usually register ultra-low ripple on all rails, but that was unfortunately not the case here. The ripple measurements we got in our normal test sessions, overload test exuded, can't be called high, but they can't compare with the values of other Seasonic products we have reviewed in the past. Even the G-550, a unit based on the same platform, achieved a much better ripple suppression, but its capacity is also significantly lower than that of the TP-750C. Anyway, ripple suppression is decent and even very good at up to 80% load. However, it isn't up to par for a Seasonic product because their implementations have spoiled us by being virtually ripple-proof.

Ripple at Full Load

You can see the AC ripple and noise the main rails registered (+12V, 5V, 3.3V, and 5VSB) in the following oscilloscope screenshots. The bigger the fluctuations on the oscilloscope's screen, the bigger the ripple/noise. We set 0.01 V/Div (each vertical division/box equals 0.01 V) as standard as the standard for all measurements.