Fractal Design Integra R2 750 W Review

Name: Fractal Design Integra R2 750 W
Brand: Fractal Design

crmaris

on Dec 14th, 2012,

in Power Supplies.

Manufacturer: Fractal Design

Performance Rating & Performance per Dollar »

Ripple Measurements

You will see the ripple levels we measured on the main rails of the Integra R2 750 W 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 Fractal Design Integra R2 750W
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
20% Load	8.9 mV	13.4 mV	17.9 mV	7.2 mV	Pass
40% Load	13.3 mV	16.5 mV	20.2 mV	9.3 mV	Pass
50% Load	16.1 mV	19.0 mV	22.6 mV	12.7 mV	Pass
60% Load	18.4 mV	20.9 mV	23.9 mV	15.4 mV	Pass
80% Load	26.6 mV	25.2 mV	27.0 mV	18.7 mV	Pass
100% Load	42.7 mV	31.1 mV	32.0 mV	27.2 mV	Pass
110% Load	51.6 mV	34.0 mV	34.7 mV	30.2 mV	Pass
Crossload 1	15.1 mV	21.5 mV	18.5 mV	8.3 mV	Pass
Crossload 2	39.2 mV	32.5 mV	34.7 mV	24.1 mV	Pass

Ripple suppression at +12V is very good, especially for a mainstream PSU. It is, at worst, a little above the middle of the corresponding limit on the minor rails. Overall, we can easily say that the PSU delivers very clean DC outputs under extreme conditions (like the ones we tested it in). Taking into account previous HEC platforms that registered way higher ripple on all rails, it is evident that they finally managed to find a solution to this problem. They surely don't reach Delta or Seasonic levels, but the improvement is huge.

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 0.01 V) as standard.