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HEC WinPower Win 550UB PSU Review
HEC WinPower Win 550UB PSU Review - PCSTATS
Abstract: According to HEC, the +3.3V line can deliver up to 32A and the +5V up to 38A, for a combined max output of 240W of power.
 81% Rating:   
Filed under: Power Supply Published:  Author: 
External Mfg. Website: HEC Group Jul 20 2005   Max Page  
Home > Reviews > Power Supply > HEC Group WIN 550UB

Power Efficiency / Load Tests

Power Jitter Observations

Voltage jitter is read by accessing the power options displayed in the motherboard BIOS, with the system obviously in an unloaded state. *All voltages were read from the Motherboard BIOS of a Foxconn NF4K8AC-8EKRS.

Listed Voltages Lower Voltage Upper Voltage Jitter
+3.3V 3.29V 3.3v 0.01v
+5.0V 4.96v 4.99v 0.03v
+12V 11.85V 11.99V 0.15v
-12V -12.00v -12.00v 0.00v
-5.0V -5.00v -5.00v 0.00v
+5.0Vsb 5.00v 5.00v 0.00v

Idle voltages are nice and stable, exactly what we'd expect from a good power supply. There was a bit of jitter in the +12V rail but not enough to sacrifice system stability.

Seasonic Load Tests Source: Seasonic

When looking at the Seasonic Power Supply test results we see two values, wattage and volt-amps. Since it might not be clear what they measure, here's a brief overview.

The volt-amp (VA) value is how much real power is being consumed by the power supply being tested to provide the wattage (W) value. The higher the VA value is, the more electricity is being used by the power supply. Because no electrical device is 100% efficient, there will always be some loss when converting AC to DC. The closer the volt-amps and wattage figures are to each other, the more efficient a power supply is. This is called the Power Factor: wattage / volt-amps = PF.

Since we're testing with a 120W dummy load, the load on the power supply (wattage) should be as close to this figure as possible. Anything above this load in apparent power describes the overhead and wasted energy (given off as heat) for the particular power supply being tested.

For the unloaded tests, the wattage and volt-amp figures should be as close as possible to one another.

Seasonic Power Load Tests

Power Supply Wattage Test Type Loaded Unloaded
Seasonic SuperTornado 400 W
Active Power 177 W 6 W
Apparent Power 182 VA 7 VA
Vantec iON2 350 W Active Power 192 W 10 W
Apparent Power 277 VA 21 VA
Antec TruePower 330 330 W Active Power 195 W 22 W
Apparent Power 289 VA 38 VA
Ultra X-Connect Green UV 500W 500 W Active Power 193W 22 W
Apparent Power 307 VA 40 VA
AOpen Silent Power AO400-12AHN 400 W Active Power 179W 9 W
Apparent Power 275 VA 18 VA
Seasonic S12-430 430 W
Active Power 179W 6W
Apparent Power 180VA 9VA
PC Power and Cooling Turbo-Cool 510 Express/SLI

510 W

Active Power

200 W

29 W
Apparent Power 202 VA 32 VA
HEC Ace Power 580UB

580 W

Active Power

183 W

12 W
Apparent Power 272 VA 26 VA
Hec Win 550UB 550 W Active Power 184W 10W
Apparent Power 263VA 22VA

For a power supply without Active PFC, the Hec Win 550UB actually performs a better than comparable units with efficiency just a hair under 70%. The Win 550UB wastes less power than the other non Active PFC power supplies shown in this comparative list, but is not as power efficient as the Active-PFC power supplies.

Final Thoughts

Despite what newbies might think, experienced users know that a reliable computer first starts with a good power supply, but there's no law that states the PSU has to be boring....

Gone are the days of of grey being the only colour power supplies come in, now you can get them in all colours, shapes and sizes. In fact you can pretty much get a power supply that suits the look of your computer, if you use cold cathodes or LEDs, it's possible to get a power supply that shines in the same colour.

First impressions are important and HEC certainly knows how to make an entrance! The Win 550UB (HEC-550TW-TF) 550W power supply shines with its large 120mm blue LED fan and glossy black finish. This PSU was definitely intended for the enthusiast with its eight molex, two floppy and two six pin 12V videocard connectors. Of course it's also a very flexible PSU with EPS12V and AMD ATXGES compatibility.

The Win 550UB's power ratings are quite high as well and with two powerful 12V rails, the power supply should be able to keep the most powerful system up and running.

While far from being as efficient as the power supplies with Active PFC, the HEC -550TW-TF still performed quite well in its class despite powering a large 120mm LED fan. Team that up with near silent operation and you've got yourself a power supply that many people will want.

The MSRP on the HEC WinPower Win 550UB power supply is $85 USD (have a look at the mfgr's website for links). Still if you find one at a good price, I don't think you'll be disappointed!

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Related Articles

Here are a few other articles that you might enjoy as well...

1. Seasonic S12-430 430 Watt Power Supply Review
2. AOpen Silent Power AO400-12AHN Power Supply Review
3. Ultra X-Connect Green UV 500W Power Supply Review
4. Vantec iON2 350W Power Supply Review
5. RAIDMAX LP-6100E 500W Power Supply Review

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Contents of Article: HEC Group WIN 550UB
 Pg 1.  HEC WinPower Win 550UB PSU Review
 Pg 2.  Exterior of the HEC-550TW-TF
 Pg 3.  — Power Efficiency / Load Tests

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