FSP Dagger Pro 850W Review - Tiny Power Plant

crmaris

on Jul 26th, 2021,

in Power Supplies.

Manufacturer: FSP

Efficiency »

Test Setup

Primary Rails Load Regulation

The following charts show the voltage values of the main rails, recorded over a range from 60 W to the maximum specified load, and the deviation (in percent) for the same load range. Tight load regulation is an essential characteristic for every power supply because it allows for constant voltage levels despite changes in load.

5VSB Regulation

Load regulation is satisfactory on all rails but 5VSB.

Ripple Measurements

Ripple represents the AC fluctuations (periodic) and noise (random) found in the DC rails of PSUs. Ripple significantly decreases the life span of capacitors because it increases their temperature; a 10 °C increase can cut into a capacitor's life span by up to 50 percent. Ripple also plays a vital role in overall system stability, especially when it is overclocked. According to the ATX specification, the ripple limits are 120 mV (+12V) and 50 mV (+5V, +3.3V, and 5VSB).

Ripple Measurements - FSP Dagger Pro 850W
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
10% Load	42.5 mV	13.0 mV	13.5 mV	11.4 mV	Pass
20% Load	38.8 mV	13.7 mV	14.5 mV	11.5 mV	Pass
30% Load	32.9 mV	14.1 mV	17.9 mV	13.7 mV	Pass
40% Load	28.1 mV	15.1 mV	19.1 mV	15.1 mV	Pass
50% Load	26.7 mV	16.6 mV	19.5 mV	14.5 mV	Pass
60% Load	39.6 mV	17.9 mV	21.6 mV	15.2 mV	Pass
70% Load	23.2 mV	20.6 mV	24.8 mV	15.8 mV	Pass
80% Load	26.7 mV	24.4 mV	22.9 mV	15.6 mV	Pass
90% Load	29.7 mV	22.2 mV	18.8 mV	15.0 mV	Pass
100% Load	37.3 mV	24.8 mV	25.9 mV	18.2 mV	Pass
110% Load	36.5 mV	25.1 mV	27.1 mV	16.9 mV	Pass
Crossload 1	46.3 mV	28.5 mV	27.8 mV	16.6 mV	Pass
Crossload 2	30.7 mV	16.8 mV	19.1 mV	14.7 mV	Pass