SilverStone Strider Plus 600 W (ST60F-PS) Power Supply Review
By Gabriel Torres on March 21, 2013


Introduction

Hardware Secrets Golden Award

The Strider Plus power supply series from SilverStone has 500 W, 600 W, 750 W, 850 W, 1,000 W, and 1,500 W models, all with a fully modular cabling system. The 500 W model has the 80 Plus Bronze certification. There are two versions for the 600 W model: with the 80 Plus Bronze certification (ST-60F-P) or with the 80 Plus Silver certification (ST60F-PS), which is the model we are going to review. The other models have the 80 Plus Silver certification.

The ST60F-PS has received the 80 Plus Gold certification. However, as SilverStone couldn’t guarantee that every single model would achieve the same performance level as the sample the company sent for testing, they decided to spontaneously downgrade it to 80 Plus Silver. Kudos to SilverStone; it would be great if all companies were this honest.

The reviewed power supply is manufactured by High Power.

SilverStone Strider Plus 600w
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Figure 1: SilverStone Strider Plus 600 W (ST60F-PS) power supply

SilverStone Strider Plus 600w
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Figure 2: SilverStone Strider Plus 600 W (ST60F-PS) power supply

The SilverStone Strider Plus 600 W (ST60F-PS) is 5.5” (140 mm) deep. It uses a 120 mm ball-bearing fan on its bottom (Globe Fan B1202512L).

SilverStone Strider Plus 600w
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Figure 3: Fan

The modular cabling system from this power supply is fully modular and has eight connectors: one for the main motherboard cable, one for EPS12V/ATX12V connectors, two for video card power connectors, and four for peripheral and SATA power connectors. This power supply comes with the following cables:

All wires are 18 AWG, which is the minimum recommended gauge.

This is a somewhat standard configuration for 600 W units, with the advantage of allowing you to install up to two high-end video cards out-of-the-box because of its four video card power connectors, while a few competing products have only two video card power connectors.

SilverStone Strider Plus 600w
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Figure 4: Cables

Let’s now take an in-depth look inside this power supply.

A Look Inside the SilverStone Strider Plus 600 W (ST60F-PS)

We decided to disassemble this power supply to see what it looks like inside, how it is designed, and what components are used. Please read our “Anatomy of Switching Power Supplies” tutorial to understand how a power supply works and to compare this power supply to others.              

On this page we will have an overall look, and then in the following pages we will discuss in detail the quality and ratings of the components used.

 

SilverStone Strider Plus 600w
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Figure 5: Top view

SilverStone Strider Plus 600w
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Figure 6: Front quarter view

SilverStone Strider Plus 600w
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Figure 7: Rear quarter view

SilverStone Strider Plus 600w
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Figure 8: The printed circuit board

Transient Filtering Stage

As we have mentioned in other articles and reviews, the first place we look when opening a power supply for a hint about its quality, is its filtering stage. The recommended components for this stage are two ferrite coils, two ceramic capacitors (Y capacitors, usually blue), one metalized polyester capacitor (X capacitor), and one MOV (Metal-Oxide Varistor). Very low-end power supplies use fewer components, usually removing the MOV and the first coil.

In the transient filtering stage, this power supply is “flawless.”

SilverStone Strider Plus 600w
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Figure 9: Transient filtering stage (part 1)

SilverStone Strider Plus 600w
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Figure 10: Transient filtering stage (part 2)

On the next page, we will have a more detailed discussion of the components used in the SilverStone Strider Plus 600 W (ST60F-PS).

Primary Analysis

On this page, we will take an in-depth look at the primary stage of the SilverStone Strider Plus 600 W (ST60F-PS). For a better understanding, please read our “Anatomy of Switching Power Supplies” tutorial.          

This power supply uses two GBU805 rectifying bridges, which are attached to the same heatsink as the active PFC and switching transistors. Each bridge supports up to 8 A at 100° C if a heatsink is used, which is the case here. In theory, you would be able to pull up to 1,840 W from a 115 V power grid. Assuming 80% efficiency, the bridges would allow this unit to deliver up to 1,472 W without burning themselves out (or 1,656 W at 90% efficiency). Of course, we are only talking about these particular components. The real limit will depend on all the components combined in this power supply.

SilverStone Strider Plus 600w
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Figure 11: Rectifying bridges

The active PFC circuit uses two SPP20N60C3 MOSFETs, each one supporting up to 20.7 A at 25° C or 13.1 A at 100° C in continuous mode (note the difference temperature makes), or 62.1 A at 25° C in pulse mode. These transistors present a 190 mΩ maximum resistance when turned on, a characteristic called RDS(on). The lower the number the better, meaning that the transistor will waste less power, and the power supply will have a higher efficiency.

SilverStone Strider Plus 600w
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Figure 12: Active PFC diode and transistors

The active PFC circuit is controlled by a CM6502 integrated circuit.

SilverStone Strider Plus 600w
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Figure 13: Active PFC controller

The output of the active PFC circuit is filtered by one 390 μF x 400 V Japanese electrolytic capacitor, from Matsushita (Panasonic), labeled at 85° C.

SilverStone Strider Plus 600w
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Figure 14: Capacitor

The switching section uses another two SPP20N60C3 MOSFETs in a resonant configuration. The specifications for these transistors were already discussed above.

SilverStone Strider Plus 600w
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Figure 15: The switching transistors

The switching transistors are controlled by a CM6901 integrated circuit.

SilverStone Strider Plus 600w
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Figure 16: Resonant controller

Let’s now take a look at the secondary of this power supply.

Secondary Analysis

As one would expect in a high-efficiency power supply, the SilverStone Strider Plus 600 W (ST60F-PS) uses a synchronous design, where the Schottky rectifiers are replaced with MOSFETs. Also, the reviewed product uses a DC-DC design in its secondary. This means that the power supply is basically a +12 V unit, with the +5 V and +3.3 V outputs produced by two smaller power supplies connected to the main +12 V rail. Both designs are used to increase efficiency.

The +12 V output uses four IPP023NE7N3 G MOSFETs, each one supporting up to 120 A at 100° C in continuous mode, or up to 480 A at 25° C in pulse mode, with a maximum RDS(on) of 2.3 mΩ.

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Figure 17: The +12 V transistors

As explained, the +5 V and +3.3 V outputs are produced by two DC-DC converters, which are located on a single daughterboard. Both converters are controlled by an APW7159 integrated circuit, and each converter makes use of four IPD060N03L G transistors. Each transistor supports up to 50 A at 100° C in continuous mode and up to 350 A at 25° C in pulse mode, with a maximum RDS(on) of 6 mΩ.

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Figure 18: The DC-DC converters

SilverStone Strider Plus 600w
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Figure 19: The DC-DC converters

The outputs are monitored by a PS224 integrated circuit, which supports over voltage (OVP), under voltage (UVP), and over current (OCP) protections. There are two +12 V over current protection (OCP) channels, but the manufacturer decided to use only one of them, giving this unit a single +12 V rail.

SilverStone Strider Plus 600w
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Figure 20: Monitoring circuit

This power supply uses Taiwanese electrolytic capacitors, from Teapo, labeled at 105° C in its secondary.

SilverStone Strider Plus 600w
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Figure 21: Capacitors

The +5VSB Power Supply

The +5VSB (a.k.a. standby) power supply is independent of the main power supply, since it is on continuously.

The +5VSB power supply uses a TNY278PN integrated circuit, which incorporates the PWM controller and the switching transistor into a single chip.

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Figure 22: The +5VSB integrated circuit with an integrated switching transistor

The rectification of the +5VSB output is performed by an SBL05L40C Schottky rectifier, which supports up to 5 A (2.5 A per internal diode).

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Figure 23: The +5VSB rectifier

Power Distribution

In Figure 24, you can see the power supply label containing all the power specs.

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Figure 24: Power supply label

This power supply is has a single +12 V rail, so there is not much to talk about here.

Let’s find out how much power this unit can deliver.

Load Tests

We conducted several tests with this power supply, as described in the article, “Hardware Secrets Power Supply Test Methodology.”          

First, we tested this power supply with five different load patterns, trying to pull around 20%, 40%, 60%, 80%, and 100% of its labeled maximum capacity (actual percentage used listed under “% Max Load”), watching the behavior of the reviewed unit under each load. In the table below, we list the load patterns we used and the results for each load.

If you add all the powers listed for each test, you may find a different value than what is posted under “Total” below. Since each output can have a slight variation (e.g., the +5 V output working at 5.10 V), the actual total amount of power being delivered is slightly different than the calculated value. In the “Total” row, we are using the real amount of power being delivered, as measured by our load tester.

The +12VA and +12VB inputs listed below are the two +12 V independent inputs from our load tester. During this test, the +12VA and the +12VB inputs were connected to the power supply’s single +12 V rail (the +12VB input was connected to the power supply’s EPS12V connector).

Input

Test 1

Test 2

Test 3

Test 4

Test 5

+12VA

4 A (48 W)

9 A (108 W)

13 A (156 W)

17.5 A (210 W)

21.5 A (258 W)

+12VB

4 A (48 W)

9 A (108 W)

13 A (156 W)

17.5 A (210 W)

21 A (252 W)

+5 V

1 A (5 W)

2 A (10 W)

4 A (20 W)

6 A (30 W)

8 A (40 W)

+3.3 V

1 A (3.3 W)

2 A (6.6 W)

4 A (13.2 W)

6 A (19.8 W)

8 A (26.4 W)

+5VSB

1 A (5 W)

1.5 A (7.5 W)

2 A (10 W)

2.5 A (12.5 W)

3 A (15 W)

-12 V

0.5 A (6 W)

0.5 A (6 W)

0.5 A (6 W)

0.5 A (6 W)

0.5 A (6 W)

Total

117.2 W

247.5 W

362.4 W

486.7 W

598.4 W

% Max Load

19.5%

41.3%

60.4%

81.1%

99.7%

Room Temp.

45.5° C

44.6° C

44.8° C

47.0° C

49.1° C

PSU Temp.

47.5° C

46.8° C

46.7° C

48.3° C

50.3° C

Voltage Regulation

Pass

Pass

Pass

Pass

Pass

Ripple and Noise

Pass

Pass

Pass

Pass

Pass

AC Power

130.9 W

272.1 W

406.7 W

556.2 W

697.4 W

Efficiency

89.5%

91.0%

89.1%

87.5%

85.8%

AC Voltage

117.6 V

116.2 V

114.4 V

113.3 V

111.7 V

Power Factor

0.982

0.991

0.993

0.994

0.995

Final Result

Pass

Pass

Pass

Pass

Pass

The 80 Plus Silver certification promises efficiency of at least 85% under light (i.e., 20%) load, 88% under typical (i.e., 50%) load, and 85% under full (i.e., 100%) load. The SilverStone Strider Plus 600 W (ST60F-PS) was able to surpass these requirements at high temperatures, which is excellent. As you can see, it surpasses the 80 Plus Gold levels at all loads but at full load.

Let’s discuss voltage regulation on the next page.

Voltage Regulation Tests

The ATX12V specification states that positive voltages must be within 5% of their nominal values, and negative voltages must be within 10% of their nominal values. We consider a power supply as “flawless” if it shows voltages within 3% of their nominal values. In the table below, you can see the power supply voltages during our tests and, in the following table, the deviation, in percentage, of their nominal values.

The SilverStone Strider Plus 600 W (ST60F-PS) presented excellent voltage regulation for the +12 V and +5 V outputs. The +3.3 V output, however, was outside the 3% range that we like to see to consider a power supply as “flawless” during test five.

Input

Test 1

Test 2

Test 3

Test 4

Test 5

+12VA

+12.26 V

+12.21 V

+12.14 V

+12.04 V

+11.98 V

+12VB

+12.27 V

+12.21 V

+12.13 V

+12.04 V

+11.96 V

+5 V

+5.14 V

+5.10 V

+5.06 V

+5.02 V

+4.98 V

+3.3 V

+3.33 V

+3.30 V

+3.26 V

+3.22 V

+3.19 V

+5VSB

+5.10 V

+5.08 V

+5.02 V

+4.97 V

+4.88 V

-12 V

-11.31 V

-11.73 V

-12.02 V

-12.03 V

-12.04 V

 

Input

Test 1

Test 2

Test 3

Test 4

Test 5

+12VA

2.17%

1.76%

1.17%

0.33%

-0.17%

+12VB

2.25%

1.75%

1.08%

0.33%

-0.33%

+5 V

2.80%

2.00%

1.20%

0.40%

-0.40%

+3.3 V

0.91%

0.00%

-1.21%

-2.42%

-3.33%

+5VSB

2.00%

1.60%

0.40%

-0.60%

-2.40%

-12 V

5.75%

2.25%

-0.17%

-0.25%

-0.33%

Let’s discuss the ripple and noise levels on the next page.

Ripple and Noise Tests

Voltages at the power supply outputs must be as “clean” as possible, with no noise or oscillation (also known as “ripple”). The maximum ripple and noise levels allowed are 120 mV for +12 V and -12 V outputs, and 50 mV for +5 V, +3.3 V, and +5VSB outputs. All values are peak-to-peak figures. We consider a power supply as being top-notch if it can produce half or less of the maximum allowed ripple and noise levels.

The SilverStone Strider Plus 600 W (ST60F-PS) provided low ripple and noise levels, as you can see below.

Input

Test 1

Test 2

Test 3

Test 4

Test 5

+12VA

41.4 mV

39.6 mV

37.4 mV

42.4 mV

55.2 mV

+12VB

39.8 mV

34.2 mV

30.2 mV

31.0 mV

41.4 mV

+5 V

8.2 mV

11.4 mV

13.2 mV

14.2 mV

16.2 mV

+3.3 V

9.4 mV

14.8 mV

13.4 mV

15.8 mV

22.8 mV

+5VSB

4.6 mV

6.2 mV

9.2 mV

10.8 mV

17.0 mV

-12 V

65.4 mV

64.2 mV

48.6 mV

36.2 mV

37.6 mV

Below you can see the waveforms of the outputs during test five.

SilverStone Strider Plus 600w
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Figure 25: +12VA input from load tester during test five at 598.4 W (55.2 mV)

SilverStone Strider Plus 600w
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Figure 26: +12VB input from load tester during test five at 598.4 W (41.4 mV)

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Figure 27: +5V rail during test five at 598.4 W (16.2 mV)

SilverStone Strider Plus 600w
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Figure 28: +3.3 V rail during test five at 598.4 W (22.8 mV)

Let’s see if we can pull more than 600 W from this unit.

Overload Tests

Below you can see the maximum we could pull from this power supply. The objective of this test is to see if the power supply has its protection circuits working properly. This power supply passed this test, as it shut down when we tried to pull more than what is described below. During this test, ripple and noise levels were still low, however the +5VSB output was at +4.58 V, 8.40% below its nominal value.

Input

Overload Test

+12VA

26 A (312 W)

+12VB

26 A (312 W)

+5 V

10 A (50 W)

+3.3 V

10 A (33 W)

+5VSB

3 A (15 W)

-12 V

0.5 A (6 W)

Total

720.4 W

% Max Load

120.1%

Room Temp.

42.2º C

PSU Temp.

41.2º C

AC Power

862.0 W

Efficiency

83.6%

AC Voltage

110.0 V

Power Factor

0.997

Main Specifications

The main specifications for the SilverStone Strider Plus 600 W (ST60F-PS) power supply include:

* Researched at Newegg.com on the day we published this review.

Conclusions

The SilverStone Strider Plus 600 W (ST60F-PS) is a very good power supply with the 80 Plus Silver certification. Officially getting the 80 Plus Gold certification, SilverStone downgraded it to 80 Plus Silver, as they couldn’t guarantee that every single product would achieve 80 Plus Gold levels at full load. Because of that, the ST60F-PS achieves 80 Plus Gold levels (between 87.5% and 91.0% in our tests) when you are not pulling 600 W from it.

The reviewed unit provides good voltage regulation (although it could be better on +3.3 V output during full load) and low noise and ripple levels.

Other highlights of this power supply include the presence of a fully modular cabling system and its size: it is only 5.5” (140 mm) deep, fitting small form factor cases that only support power supplies with this depth.

At USD 106, it competes in price mostly with models with the 80 Plus Bronze certification, making it a no-brainer against such power supplies. However, there are a few models with the 80 Plus Gold (Fractal Design Tesla R2 650 W and Rosewill CAPSTONE-650-M) and even with the 80 Plus Platinum (Rosewill Tachyon 650 W) in the same price range. However, these models don’t have a fully modular cabling system and may have higher noise and ripple levels, and worse voltage regulation.

Originally at http://www.hardwaresecrets.com/article/SilverStone-Strider-Plus-600-W-ST60F-PS-Power-Supply-Review/1751


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