BitFenix Formula Gold 750 W Review

Name: BitFenix Formula Gold 750 W
Brand: BitFenix

crmaris

on Nov 2nd, 2017,

in Power Supplies.

Manufacturer: BitFenix

Protection Features Evaluation »

Ripple Measurements

You will see the ripple levels we measured on the rails of the BF750F 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 - Bitfenix BF750G
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
10% Load	7.5 mV	6.6 mV	7.2 mV	11.2 mV	Pass
20% Load	11.4 mV	8.2 mV	10.2 mV	12.5 mV	Pass
30% Load	27.7 mV	8.5 mV	11.1 mV	13.1 mV	Pass
40% Load	25.2 mV	10.9 mV	20.6 mV	14.2 mV	Pass
50% Load	25.2 mV	9.1 mV	11.7 mV	15.5 mV	Pass
60% Load	27.1 mV	11.4 mV	13.6 mV	16.5 mV	Pass
70% Load	28.5 mV	12.5 mV	14.2 mV	27.4 mV	Pass
80% Load	30.2 mV	12.0 mV	14.0 mV	19.9 mV	Pass
90% Load	30.3 mV	16.7 mV	15.2 mV	19.4 mV	Pass
100% Load	33.5 mV	18.7 mV	17.6 mV	19.9 mV	Pass
110% Load	34.9 mV	28.6 mV	25.7 mV	19.7 mV	Pass
Crossload 1	25.9 mV	11.0 mV	12.2 mV	9.0 mV	Pass
Crossload 2	25.0 mV	12.7 mV	15.2 mV	17.3 mV	Pass

Ripple suppression is pretty good on the +12V rail and superb on the minor rails. CWT did a good job here. With 110% load, we did notice some spikes, which most likely occurred because the test combines high operating temperatures with a high load. However, the PSU did operate beyond its nominal capacity, and we will, as such, not include this result in our final rating. We only conduct the overload test to check on how close a PSU's nominal capacity is to the platform's true capabilities. In any case, we advice against applying such a load to a PSU since doing so can backfire badly.

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 the standard for all measurements.