Rosewill Capstone Modular 750 W Review

Name: Rosewill Capstone Modular 750 W
Brand: Rosewill

crmaris

on May 2nd, 2012,

in Power Supplies.

Manufacturer: Rosewill

Performance Rating & Performance per Dollar »

Ripple Measurements

In the following table you will find the ripple levels that we measured on the main rails of CAPSTONE-750-M. According to ATX specification the limits are 120 mV (+12V) and 50 mV (5V, 3.3V and 5VSB).

Ripple Measurements Rosewill CAPSTONE-750-M
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
20% Load	13.8 mV	8.3 mV	5.6 mV	4.4 mV	Pass
40% Load	16.6 mV	9.2 mV	6.8 mV	5.0 mV	Pass
50% Load	20.5 mV	9.4 mV	7.9 mV	5.2 mV	Pass
60% Load	23.2 mV	10.9 mV	10.2 mV	6.2 mV	Pass
80% Load	28.4 mV	11.7 mV	14.2 mV	6.8 mV	Pass
100% Load	33.2 mV	13.1 mV	17.6 mV	7.7 mV	Pass
Crossload 1	17.9 mV	13.5 mV	10.4 mV	4.2 mV	Pass
Crossload 2	31.2 mV	10.1 mV	13.5 mV	5.4 mV	Pass

Similar to all Super Flower platforms we have tested so far this one is ripple proof too. The +12V rail at worst case is at about one fourth of the corresponding limit and the minor rails don't even come close to 20mV at full load. Finally the 5VSB rail delivers an almost flat DC output. Overall this unit features an excellent DC output quality on all rails and confirms its high overall performance.

Ripple at Full Load

In the following oscilloscope screenshots you can see the AC ripple and noise that 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 to 0.01V) as standard.