Fractal Design ION+ Platinum 660 and 860W PSU review

PSU - Power Supply Units 106 Page 7 of 9 Published by


Load testing the PSU

Load Testing The PSU

Testing a power supply is definitely a challenge, and you’ll need professional load testers to check the PSU’s behavior the right way.  


The first basic test is performed with a simple power supply tester. It doesn’t load the PSU more than a couple of Watts, but it helps to determine if the power supply unit is operational at all. There’s a self-check indicating if the voltages are at the proper levels. As you can see, there have been no issues with the Fractal ION+ PLATINUM unit.

The following setup was used for the remainder of the testing:

  • Voltcraft VC-870 Digital Multimeter - voltage measurement (+ Fluke 97 scope meter)
  • Oscilloscope - GW INSTEK GDS 3154
  • DC load - original solution
  • Fluke 97 Scope meter (a measurement of voltage and ripple),
  • Voltcraft SL-451 decibel meter (volume measurement)
  • ACUVIM-IIRF – for measuring active power (input from the socket).
  • PCE Instruments PCE-DT 50 tachometer – for the measurement of the rotational speed of the fan.

Measurements are taken only using 230 V input voltage.


In our power supply reviews, we emulate real-world usage by creating such loads as a power-hungry, multi-GPU setup with a powerful CPU would have. Older components used to require more power, but there has been some progress in this area. In a typical setup, reaching over 500-600 Watts is a rather difficult task. Let’s take a look at the ION+’s efficiency first. Checking efficiency is actually a relatively easy thing to accomplish.



It does look great even at low loads (10% equaling 66/86 W), which is quite typical of the idle state in modern PC’s.

Maximum load

Next up is the maximum wattage that this unit can hold up before switching off.

Maximum Load

Efficiency (in %)

725 W (for 660W variant)


930 W (for 860W variant)


Efficiency looks excellent even above 100% load. 725 and 930 Watts are impressive values, but you really wouldn’t want to come close to that for long.

ErP Lot 6 Power Off wattage

We looked at the powered-off status (ErP/EuP), productivity mode (when we stress the CPUs), and finally gaming. The lower the wattage, the more efficient the PSU. It is that simple.  

ErP Lot 6 Power Off

value in Watts

660 W variant


860 W variant


This is well below the 0.5 W requirement.

Ripple testing

First up is the ATX12V V2.2 specification for DC output ripple: 

ATX12V Ver 2.2 Noise/Ripple Tolerance


Ripple (mV p-p)

+3.3 V


+5 V


+12 V


The Fractal ION+ ION+ PLATINUM 660 W achieved the following results:

AC Ripple (mV p-p) +3.3 V +5 V +12 V
65 W (10%) 5 10 12
160 W (25%) 7 12 11
330 W (50%)
15 12
485 W (75%) 13 18 17
660 W (100%)
15 20 28

For the 860 W variant it’s:

AC Ripple (mV p-p) +3.3 V +5 V +12 V
85 W (10%) 5 6 8
210 W (25%) 5 10 10
435 W (50%)
10 14
640 W (75%) 12 12 16
860 W (100%)
16 15 18

The values are very well within tolerance. Even in the worst-case scenario (100% load), it is not worrying at all.

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