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Ripple Measurements

To learn how we measure ripple, please click here.

The following table includes the ripple levels we measured on the TPG-1250D-T's rails. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V and 5VSB).

Test	12V	5V	3.3V	5VSB	Pass/Fail
10% Load	14.7mV	7.8mV	6.0mV	6.1mV	Pass
20% Load	24.2mV	8.0mV	6.3mV	7.7mV	Pass
30% Load	30.2mV	8.7mV	6.8mV	9.7mV	Pass
40% Load	35.3mV	9.4mV	6.7mV	11.4mV	Pass
50% Load	30.4mV	9.8mV	7.2mV	13.5mV	Pass
60% Load	24.4mV	10.6mV	7.6mV	14.5mV	Pass
70% Load	32.8mV	11.6mV	8.3mV	16.7mV	Pass
80% Load	36.1mV	12.9mV	9.2mV	19.9mV	Pass
90% Load	39.4mV	14.2mV	10.8mV	21.9mV	Pass
100% Load	42.6mV	15.7mV	12.3mV	24.6mV	Pass
110% Load	45.1mV	16.7mV	12.8mV	25.8mV	Pass
Cross-Load 1	15.6mV	12.1mV	8.7mV	6.3mV	Pass
Cross-Load 2	41.5mV	14.9mV	12.2mV	26.2mV	Pass

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Ripple suppression on the +12V rail is good, though not as good as Corsair's and EVGA's high-end offerings. Ripple on the 5V and 3.3V rails is fairly low, while it's low enough on the 5VSB rail.

We should note that Super Flower's implementations use extra filtering capacitors installed on the modular cables to enable such low ripple readings. The problem with cable-installed caps is that they make the modular cables bulkier. Thus, it is much harder to route them inside a chassis. On the other hand, the fully-digital Flextronics platforms (Corsair AXi units) manage to offer exceptional ripple performance without the need for extra caps on the modular cables.

Ripple Oscilloscope Screenshots

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