With the Leadex Gold 850 Watt, Super Flower has a PSU in their portfolio which they manufacture in-house. Especially in the case of their high-end power supplies SuperFlower is known for excellent build quality and apart from that their choice of components is very well though. Therefore it might not strike as a surprise, that we're really curious who this PSU is going to deal with our test parcours.
On the following pages
we're going to show you the strengths and weaknesses of the Super Flower Leadex
Gold 850W Watt.
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Preview
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Delivery and Specifications
With
the Super Flower Leadex Gold 850W Watt you get a fully modular power supply.
Cables |
Cable |
Length |
1 x ATX 20+4 pin |
54 cm |
2 x EPS/ATX 12V (8 & 4+4) pin |
65 cm |
2 x PCI-E 6+2 pin |
54 cm, 67 cm |
2 x PCI-E 6+2 pin |
55 cm |
2 x 4x SATA |
50, 63, 76, 89 cm |
2 x 2x SATA + 2x Molex |
50, 63, 76, 89 cm |
1 x 3x Molex +
1 x Floppy |
55, 68, 81, 94 cm |
With its four PCIe connectors this PSU hasn't been
equipped with too many of them. It would have been nice if SuperFlower added
another pair for six pin connectors to the delivery. Nevertheless overall connectivity is good for a
850W PSU. We like seeing universal
plugs on this PSU. In our opinion this is an important step towards more
versatile PSUs. Apart from that the fact that the plugs received a backlight
makes them look really nice especially in the dark.
Specifications |
Voltage |
Current |
Power |
+ 3.3 V |
24 A |
120 Watt |
850 Watt (Total) |
+ 5.0 V |
24 A |
+ 12 V |
70.8 A |
849.6 Watt |
- 12 V |
0.5 A |
6 Watt |
+ 5 Vsb |
3.0 A |
15 Watt |
The
SF-850F14MG has been 80Plus Gold certified. This means, that the efficiency of
this PSU should be above 87% at 20% load, above 90% at 50% load and above 87% at
100% load.
At this point the feature list:
- 80Plus Gold
- OVP, UVP, OCP, SCP, OPP, OTP
- Dimensions (W x H x D): 150 mm x 86 mm x 200 mm
- 140 millimeter fan
- Warranty: 5 Years
- Price: is estimated to be
around 117 Euro / 147 CHF
Remarkable
is the depth of this PSU as well as the long lasting warranty.
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A Look Inside
The first hint for a high Quality PSU we can see already when we
take a first look at it. At this point we get a nice design and high quality case.
Right at the input there are two X capacitor. On the main PCB the transient
filtering stage continues with two X and four Y caps and there is also one CM choke
and one MOV (Metal-Oxid-Varistor). Additionally there is an NTC thermistor for inrush current limitation. A
mechanical relay shorts the NTC thermistor for normal operation. The transient
filtering stage is well done.
Rectification is being handled by two bridge rectifiers in the case of this PSU. The PFC booster consists
of two IPP50R199P mosfets and two C3D06060A SiC shottky diodes. The APFC is controlled by an NCP1653A from ON Semiconductor. This PSU
features two APFC capacitors
from Nippon Chemi-Con (KMR series; 300uF and 400V at 105°C). The total
capacitance of 600uF is competitive for a 850W PSU. The LLC resonance
converter, is controlled by an ASIC with the name
AA9013.
Either the overall build quality as well as the quality of the components used
make this an excellent product, which will provied power reliably over years.
On the secondary side there are 4 IPP041N04N (40V, 4.1mOhm, 80A) mosfets
to take care of 12V rectification. These mosfets are directly
cooled via 2 heatsinks. The design of the secondary side is solid. 3.3 and 5V
are generated from 12V using DC-DC conversion. Those are located on two Daughter
PCBs. The DC filtering is done using Nippon Chemi-Con capacitors. Those are
extremely high end. The connection of the main PCB to the connector PCB is well
done. The connector PCB has some additional capacitors from Capxon which are non
Japanese.
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Input/Output Power and
Efficiency
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Result Analysis and Discussion
Efficiency 115V
|
Load |
Pin(W) |
Pout(W) |
Efficiency |
10 % |
100.98 |
86.10 |
85.26 % |
20 % |
192.23 |
172.33 |
89.65 % |
50 % |
474.10 |
428.92 |
90.47 % |
100 % |
976.30 |
850.52 |
87.12 % |
The 80Plus Gold certification
requirements (87% - 90% - 87%) are surpassed especially at 20% Load. The full Load
efficiency is a bit higher at 230V AC. This is the case with most of todays PSU's an it mainly
originates from the reason of lower losses in the AC filtering stage and the PFC at
230V AC. The 230V AC 100% Load efficiency is 90.47%.
Output Stability |
Load |
Rail |
Loading(A) |
Output(V) |
10 % |
5V |
1.20 |
5.00 |
3.3V |
1.20 |
3.30 |
12V |
6.10 |
12.10 |
|
20 % |
5V |
2.50 |
5.00 |
3.3V |
2.50 |
3.30 |
12V |
12.20 |
12.10 |
|
50 % |
5V |
6.20 |
5.00 |
3.3V |
6.20 |
3.30 |
12V |
30.50 |
12.10 |
|
100 % |
5V |
12.30 |
5.00 |
3.3V |
12.40 |
3.30 |
12V |
60.60 |
12.00 |
Noise |
Load |
|
20 % |
Noiseless |
50 % |
Silent |
100 % |
Audible |
Voltage regulation of
this PSU is very good. It makes use of a DC-DC approach, which means, that the 12
Volt rail is being used to generate 5 and 3.3V.
This is a very modern approach, and since the Load is mainly on 12V it makes a
lot of sense. Like most PSU, which use this topology, the voltage regulation and
crossload testing does not present a problem.
Noise/Ripple |
Voltage |
Noise/Ripple Vpp |
5V |
0.009 |
12V |
0.010 |
3.3V |
0.008 |
The noise/ripple values you can
see here come from a Chroma test report, which we got from the manufacturer. The
noise values
are excellent. However these values are probably measured in a different
way, which means, that they're not comparable to other PSU reviews. However the
DC output quality is excellent, and in comparison with many other PSUs
outstanding.
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Conclusion
With the
Leadex Gold 850W, Super
Flower offers
a PSU, which is available for 117 Euro. Connectivity options are good although
we would have appreciated another pair of PCIe cables. For a
850W PSU
the efficiency surpasses 80Plus Gold standards with huge margin especially at
20% load.
This unit is very well manufactured and the DC output quality is simply excellent.
Another neat feature, especially for modding, is the lighting you get with the
connectors. Another great sign of quality is, that the efficiency does
not drop much between 50 and 100% Load. Additionally, because of it's very low
ripple/noise, this PSU is very well suitable for high-end PC audio, where low
ripple and noise values are what you're looking for.
Overall you get an excellent power supply with the Super Flower Leadex Gold 850W. Thank you very much for the good work Super Flower!
We rate the Super Flower Leadex 850W with 5 out of 5 possible stars.