The key to a solid systems foundation is in the quality of the power being distributed through it. There are a number of top level OEM companies like FSP and Top Power that pretty much build the majority of the power supplies on the market currently. Seventeam is new to the US market but their power supplies are not; some SilverStone PSU’s were actually manufactured by Seventeam. Seventeam has been around for a number of years but we are just starting to see them creep into the US market and with power supplies boast Japanese capacitors I am sure they will be warmly welcomed to the power hungry westerners. Let’s take a look at the Seventeam Z-FORCE 700W Modular Power Supply and see if it has what it takes for your next build:

Provided by: Seventeam

Price: TBA

Closer Look:

Specifications and Features:

ST-700PSD Feature   ●    Conforms to ATX 12V V2.2 specification ●    Full range voltage: 90-264Vac ●    Active PFC (Power Factor Correction) > 0.99 ●    High Standard compatibility: Support SLI VGA card                                             Support Multi-Core CPU ●    Dual independent +12V rails, provide powerful output Voltage ●    High Efficiency >88% ●    135mm ultra silent fan delivers efficient air flow ●    Comb-shaped heat sink made from highly conductive metal:        low drag delivers better heat dissipation. ●    Uses LLC Resonant Circuit), DC-DC and SR (Synchronous Rectifying) circuit construction ●    Solid Capacitors and 100% Japanese-made Capacitors for maximum reliability and stability ●    Protection：OCP、OVP、UVP、OPP、SCP

Spec.     Model No ST-700PSD Output Wattage 700W PFC Active PFC Efficiency > 85 % FULL LOADING Noise Level   P. G. signal 100-500 ms Hold-up Time 14ms at 25℃ Weight 2.2 KG Color Black Fan Single 135 mm DC Fan Dimension 163mm (L) x 150mm(W) x 86mm(H) Protection OCP、OVP、UVP、OPP、Short Circuit Protection   INPUT Input Voltage 90-264 VAC Input Frequency 50 ~ 60 Hz MTBF 100,000 hrs minimum (at 25 ℃) Input Current 10-5A    OUTPUT   Voltage +5V +12V1 +12V2 -12V +3.3V +5Vsb MIN 1 1 1 0.0 0.5 0.1 NOM 12.5 15 15 0.25 12.5 1.25 MAX 25 30 30 0.5 25 2.5 Units AMPS AMPS AMPS AMPS AMPS AMPS                                         Note： 1)  The maximum continuous total DC output power shall not exceed 700 Watts.                                 2) The maximum continuous combined load on +5V and +3.3V outputs shall not exceed 150 Watts                                 3) The maximum continuous combined load on +12V1 and +12V2 outputs shall not exceed 650W.                    4) The maximum continuous combined load on +5V, +3.3V and +12V1, +12V2 outputs shall not exceed 685 Watts. Environment Operation Temperature 5 ℃ to 50℃ Storage Temperature -40 ℃ to 70℃ Operation Humidity 20% to 85%, non-condensing Storage Humidity 10% to 95%, non-condensing

Testing Rig:

• AMD Phenom II 965 Black Edition
• Noctua NH-D14 CPU Cooler
• Crucial DDR3 PC3 16000 2 x 1 GB
• Cooler Master HAF Special: AMD
  
• ATI Radeon 5570
• Western Digital 1TB HDD
• Windows 7 Ultimate 64bit Edition

Testing:

In order to test the power supply we will be putting it up against other PSU’s in its class. I will be running both a load and idle test on all the power supplies and recording the data. The comparison power supplies will be a Cooler Master GS 750W, Thermaltake 650W and a Coolmax USA ZP 750W.

Load Idle:

Conclusion:

 The overall performance from the Seventeam Z-FORCE 700W Modular Power Supply was very impressive. Usually you will see a fluctuation between load and idle voltages on power supplies of lesser quality. The Coolmax USA PSU’s were the cheapest PSU’s of the bunch and they showed their true nature when we looked at the 3.3 rail voltages. Although under voltage won’t destroy components overall performance will be affected especially when you need the extra boost for overclocking. Japanese capacitors make voltage regulation much cleaner and solid which in turn makes all your rails maintain rock solid voltages which means no loss of voltage during taxing OC sessions or gaming.

Would I recommend this product? Although I must say my personal choices for power supply companies are Thermaltake, CoolerMaster, and Mushkin; the people at Seventeam made me cave I am now running one of my test rigs with a Seventeam PSU and I couldn’t be happier. The Z-Force PSU is rock solid and very well designed if you are looking for something new in the North American PSU world, then you have to check out Seventeams impressive lineup.

Pros:

• 80 Plus Silver Certified 
• Japanese Capacitors
• Rock Solid Voltages
• 2 Dedicated 12v Rails
• Silent
• Great Design
• Modular

• Could use More Molex Connectors

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