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SuperFlower Leadex Titanium 1600W Review

Additional technical assistance: Peter McFarland and Jeremy Price.

Correctly testing power supplies is a complex procedure and KitGuru have configured a test bench which can deliver up to a 2,000 watt DC load. Due to public requests we have changed our temperature settings recently – previously we rated with ambient temperatures at 25C, we have increased ambient temperatures by 10c (to 35c) in our environment to greater reflect warmer internal chassis conditions.

We use combinations of the following hardware:

• SunMoon SM-268
• CSI3710A Programmable DC load (+3.3V and +5V outputs)
• CSI3711A Programmable DC load (+12V1, +12V2, +12V3, and +12V4)
• Extech Power Analyzer
• Extech MultiMaster MM570 digital multimeter
• Extech digital sound level meter
• Digital oscilloscope (20M S/s with 12 Bit ADC)
• Variable Autotransformer, 1.4 KVA

We test the SuperFlower Leadex Titanium 1600W with the fan in the ‘AUTO’ state.

DC Output Load Regulation

Combined

DC Load

+3.3V
+5V
+12V
+5VSB
-12V
A
V
A
V
A
V
A
V
A V
500W
7.63
3.33
8.82
5.06
36.05
12.12
1.5
5.02
0.30 -12.07
750W
12.63
3.33
14.12
5.05
52.06
12.09
2.0
5.02
0.30 -12.07
1000W
17.75
3.33
20.00
5.05
72.25
12.06
2.5
5.01
0.50 -12.08
1250W 18.84 3.32 24.04 5.05 90.14 12.03 3.0 5.00 0.60 -12.09
1500W
18.87
3.32
22.64
5.03
115.90
12.00
3.5
5.00
0.80 -12.10
1600W 10.00 3.31 10.00 5.03 125.00 11.97 3.5 5.00 0.80 -12.12

Load regulation is stellar, even when delivering the full 1600 watts of power.

SuperFlower Leadex Titanium 1600W PSU Maximum Load
1789W

We managed to get the PSU to achieve 1789W before it would shut down, delivering around 189W more than the rated specifications.

Next we want to try Cross Loading. This basically means loads which are not balanced. If a PC for instance needs 500W on the +12V outputs but something like 30W via the combined 3.3V and +5V outputs then the voltage regulation can fluctuate badly.

Cross Load Testing +3.3V +5V +12V -12V +5VSB
A V A V A V A V A V
1150W 3.0 3.33 2.0 5.05 92.0 12.05 0.2 -12.04 0.50 5.01
250W 20.0 3.30 24.0 5.02 5.0 12.09 0.2 -12.04 0.50 5.01

The SuperFlower Leadex Titanium 1600W produced some killer results in the cross loading test. No discernible weaknesses.

We then used an oscilloscope to measure AC ripple and noise present on the DC outputs. We set the oscilloscope time base to check for AC ripple at both high and low ends of the spectrum.

ATX12V V2.2 specification for DC output ripple and noise is defined in the ATX 12V power supply design guide.

ATX12V Ver 2.2 Noise/Ripple Tolerance
Output
Ripple (mV p-p)
+3.3V
50
+5V
50
+12V1
120
+12V2
120
-12V
120
+5VSB
50

Obviously when measuring AC noise and ripple on the DC outputs the cleaner (less recorded) means we have a better end result. We measured this AC signal amplitude to see how closely the unit complied with the ATX standard.

AC Ripple (mV p-p)
DC Load +3.3V +5V +12V 5VSB
500W 10 5 5 5
750W 10 5 5 5
1000W 10 5 10 5
1250W 10 5 15 5
1500W 15 10 15 10
1600W 15 10 15 10

Fantastic ripple suppression, and yet again figures that any manufacturer would be pleased to produce. As good as we have seen in a high power unit such as this.

Efficiency (%)
500W
93.67
750W
95.65
1000W
94.94
1250W
93.55
1500W 93.12
1600W 92.43

Overall efficiency is excellent, peaking at 95.65% when delivering between 750 and 850 watts.

We take the issue of noise very seriously at KitGuru and this is why we have built a special home brew system as a reference point when we test noise levels of various components. Why do this? Well this means we can eliminate secondary noise pollution in the test room and concentrate on components we are testing. It also brings us slightly closer to industry standards, such as DIN 45635.

Today to test the power supply we have taken it into our acoustics room environment and have set our Digital Sound Level Noise Decibel Meter Style 2 one meter away from the unit. We have no other fans running so we can effectively measure just the noise from the unit itself.

As this can be a little confusing for people, here are various dBa ratings in with real world situations to help describe the various levels.

KitGuru noise guide

10dBA – Normal Breathing/Rustling Leaves
20-25dBA – Whisper
30dBA – High Quality Computer fan
40dBA – A Bubbling Brook, or a Refrigerator
50dBA – Normal Conversation
60dBA – Laughter
70dBA – Vacuum Cleaner or Hairdryer
80dBA – City Traffic or a Garbage Disposal
90dBA – Motorcycle or Lawnmower
100dBA – MP3 Player at maximum output
110dBA – Orchestra
120dBA – Front row rock concert/Jet Engine
130dBA – Threshold of Pain
140dBA – Military Jet takeoff/Gunshot (close range)
160dBA – Instant Perforation of eardrum

Noise (dBA)
500W
28.0
750W
28.4
1000W
33.2
1250W
33.6
1500W 34.1
1600W 35.7

Due to the extreme efficiency of the power supply, the fan is never tasked particularly hard. Noise levels at or below 1000 Watts are exceptionally good. At 1300 watts, the fan ramps up and it becomes audible, although never too intrusive.

Temperature (c)
Intake
Exhaust
500W
36
39
750W
37
41
1000W
42
48
1250W
46
52
1500W
48
55
1600W 51 61

The large fan copes with the heat inside the chassis, spinning more actively as the load increases above 1,000 watts.

Maximum load
Efficiency
1789W
92.12

At 1789W, the efficiency level is still good, measuring 92.12%. Not a practical situation to be running 24/7, but worth noting.

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