Rosewill Tachyon 750 W Review

Name: Rosewill Tachyon 750 W
Brand: Rosewill

crmaris

on Sep 4th, 2013,

in Power Supplies.

Manufacturer: Rosewill

Performance Rating, Performance per Dollar & Noise Rating »

Ripple Measurements

You will see the ripple levels we measured on the main rails of the Tachyon-750 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 Rosewill Tachyon-750
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
20% Load	13.5 mV	12.1 mV	10.2 mV	5.4 mV	Pass
40% Load	24.0 mV	11.7 mV	12.9 mV	7.1 mV	Pass
50% Load	25.4 mV	11.9 mV	15.0 mV	8.2 mV	Pass
60% Load	28.4 mV	12.6 mV	16.8 mV	9.3 mV	Pass
80% Load	31.3 mV	14.1 mV	16.3 mV	10.8 mV	Pass
100% Load	36.8 mV	15.7 mV	21.5 mV	12.2 mV	Pass
110% Load	39.5 mV	16.2 mV	24.7 mV	12.7 mV	Pass
Crossload 1	16.2 mV	13.1 mV	14.3 mV	17.3 mV	Pass
Crossload 2	33.3 mV	12.8 mV	15.7 mV	8.8 mV	Pass

Ripple was never an issue for SF products and the Tachyon-750 is clear proof of this. At +12V and irregardless of our tough testing conditions, ripple barely surpassed 35 mV during the full load test, keeping under 40 mV during the overload test. Ripple suppression on the minor rails was very good, with 3.3V performing the worst by registering ripple half of the limit in our 110% overload test.

Ripple at Full Load

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