FSP Hydro PTM Pro 1200 W Review - A Silent Power Factory

crmaris

on Dec 9th, 2020,

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 important characteristic for every power supply because it allows for constant voltage levels despite changes in load.

5VSB Regulation

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 an important role in overall system stability, especially when it is overclocked. The ripple limits according to the ATX specification are 120 mV (+12V) and 50 mV (+5V, +3.3V, and 5VSB).

Ripple Measurements - FSP Hydro PTM Pro 1200W
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
10% Load	6.8 mV	6.6 mV	21.8 mV	12.0 mV	Pass
20% Load	7.6 mV	7.0 mV	22.0 mV	13.4 mV	Pass
30% Load	8.7 mV	8.3 mV	23.6 mV	20.2 mV	Pass
40% Load	10.0 mV	7.8 mV	24.1 mV	22.6 mV	Pass
50% Load	11.0 mV	8.0 mV	25.4 mV	20.0 mV	Pass
60% Load	10.0 mV	8.7 mV	25.4 mV	24.4 mV	Pass
70% Load	10.7 mV	9.0 mV	25.6 mV	28.6 mV	Pass
80% Load	11.3 mV	8.9 mV	25.3 mV	27.0 mV	Pass
90% Load	12.1 mV	9.5 mV	26.9 mV	30.7 mV	Pass
100% Load	21.1 mV	10.6 mV	30.2 mV	32.6 mV	Pass
110% Load	22.6 mV	10.9 mV	31.7 mV	32.8 mV	Pass
Crossload 1	9.5 mV	10.5 mV	24.9 mV	9.8 mV	Pass
Crossload 2	21.5 mV	9.0 mV	30.2 mV	23.6 mV	Pass

One of the two samples I had couldn't output 110% of its maximum-rated capacity, so I only applied a load of up to 106%. It was also impossible to run the Crossload 1 test (full load at +12 V, minor load on the minor rails). Thankfully, I also had a second sample that didn't have these issues.

Ripple suppression is good at + 12 V and excellent at 5 V. That said, I would like to see less than 30 mV at 3.3 V and 5VSB with 110% load.