Fractal Design Tesla R2 1000 W Review

Name: Fractal Design Tesla R2 1000 W
Brand: Fractal Design

crmaris

on Jun 6th, 2013,

in Power Supplies.

Manufacturer: Fractal Design

Performance Rating & Performance per Dollar »

Ripple Measurements

You will see the ripple levels that we measured on the main rails of the Tesla R2 1000 W in the following table. The limits are 120 mV (+12V) and 50 mV (5V, 3.3V, and 5VSB) according to the ATX specification.

Ripple Measurements Fractal Design R2 1000W
Test	12 V	5 V	3.3 V	5VSB	Pass/Fail
20% Load	15.6 mV	14.4 mV	15.6 mV	17.7 mV	Pass
40% Load	21.9 mV	18.5 mV	19.2 mV	19.5 mV	Pass
50% Load	26.0 mV	20.8 mV	20.7 mV	22.7 mV	Pass
60% Load	30.9 mV	22.3 mV	24.1 mV	23.2 mV	Pass
80% Load	37.4 mV	26.5 mV	27.7 mV	27.2 mV	Pass
100% Load	51.0 mV	41.8 mV	34.6 mV	31.5 mV	Pass
110% Load	62.9 mV	40.2 mV	36.7 mV	33.0 mV	Pass
Crossload 1	19.8 mV	18.6 mV	23.2 mV	20.2 mV	Pass
Crossload 2	46.6 mV	29.9 mV	27.9 mV	27.1 mV	Pass

Ripple suppression at +12V is fairly good for a unit of this category. If this was a high-end PSU, we would want to see ripple below 40 mV on the same rail; ideally under 30 mV. Ripple on the minor rails is kept at fairly good levels up to the 80% test, but it increases significantly during the full-load test, with 5V taking most of the hit. Sure, the limit is still a ways away, but we would like to see better ripple suppression on these rails. That said, the R2 1000 W still managed to outperform its high-end sibling (the R3 1000 W) in these tests.

Ripple at Full Load

You can see the AC ripple and noise that 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. For all measurements, we set 0.01 V/Div (each vertical division/box equals 0.01 V) as standard.