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The new SiverStone Strider Gold Evolution series of power supplies is comprised of 750 W, 850 W, 1,000 W, and 1,200 W models, all featuring the 80 Plus Gold certification, a removable air filter for the fan, and a full modular cabling system, meaning that even the main motherboard cable is detachable. Let’s see if the 750 W model is a good option.
This is the first power supply we’ve seen with an air filter for its fan. It is attached to the power supply magnetically, making it very easy to be removed and cleaned. Interestingly, the company sells this filter by itself, in case you want to have this feature on another power supply.
The SilverStone Strider Gold Evolution 750 W is 7.1” (160 mm) deep, using a 139 mm fluid dynamic bearing fan on its bottom (SilverStone AP141 “Air Perpetrator,” which is actually a Honghua HA1425L).
As mentioned, this unit has a full modular cabling system with 11 connectors, one for the main motherboard cable, two for ATX/EPS12V power cables, four for video card power cables, and four for peripheral and SATA power cables. This power supply comes with the following cables:
- Main motherboard cable with a 20/24-pin connector, 22” (56 cm) long
- One cable with two ATX12V connectors that together form an EPS12V connector, 21.6” (55 cm) long
- One cable with two ATX12V connectors that together form an EPS12V connector, 29.5” (75 cm) long
- Two cables, each with one six-pin connector for video cards, 22” (56 cm) long
- Two cables, each with one six/eight-pin connector for video cards, 22” (56 cm) long
- Two cables, each with four SATA power connectors, 23.6” (60 cm) to the first connector, 5.9” (15 cm) between connectors
- One cable with three standard peripheral power connectors and one floppy disk drive power connector, 23.6” (60 cm) to the first connector, 5.9” (15 cm) between connectors
The ATX12V/EPS12V and video card power cables use thicker, 16 AWG wires, while all other cables use 18 AWG wires, which is the minimum recommended gauge.
The cable configuration is excellent for a 750 W power supply, with four video card power connectors and eight SATA power connectors.
Let’s now take an in-depth look inside this power supply.
[nextpage title=”A Look Inside the SilverStone Strider Gold Evolution 750 W”]
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.
[nextpage title=”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 this stage, the SilverStone Strider Gold Evolution 750 W power supply is impeccable, with two Y capacitors and three X capacitors more than the minimum required.
On the next page, we will have a more detailed discussion about the components used in the SilverStone Strider Gold Evolution 750 W.
[nextpage title=”Primary Analysis”]
On this page we will take an in-depth look at the primary stage of the SilverStone Strider Gold Evolution 750 W. For a better understanding, please read our “Anatomy of Switchi
ng Power Supplies” tutorial.
This power supply uses one GBU1006 rectifying bridge, which is attached to an individual heatsink. This bridge supports up to 10 A at 100° C, so in theory, you would be able to pull up to 1,150 W from a 115 V power grid. Assuming 80% efficiency, the bridge would allow this unit to deliver up to 920 W without burning itself out. Of course, we are only talking about this particular component. The real limit will depend on all the components combined in this power supply.
The active PFC circuit uses two STW20NM50FD MOSFETs, each one capable of delivering up to 20 A at 25° C or 14 A at 100° C in continuous mode (note the difference temperature makes), or up to 80 A in pulse mode at 25° C, each. These transistors present a 220 mΩ resistance when turned on, a characteristic called RDS(on). The lower this number the better, meaning that the transistors will waste less power, and the power supply will achieve a higher efficiency.
The output of the active PFC circuit is filtered by two 270 µF x 420 V electrolytic capacitors connected in parallel. This is the equivalent of one 540 µF x 420 V. Both capacitors are Japanese, from Matsushita (Panasonic), and labeled at 105° C.
In the switching section, the SilverStone Strider Gold Evolution 750 W uses another two STW20NM50FD MOSFETs in the traditional two-transistor forward configuration. The specifications for these transistors were previously discussed above.
The primary is managed by a CM6802 PWM controller.
Let’s now take a look at the secondary of this power supply.
[nextpage title=”Secondary Analysis”]
The SilverStone Strider Gold Evolution 750 W uses a synchronous design in its secondary, meaning that the diodes were replaced with transistors in order to increase efficiency. In addition, this power supply uses a DC-DC design, meaning that it is basically a +12 V power supply, with the +5 V and +3.3 V outputs generated by two smaller switch-mode power supplies attached to the main +12 V output. This is also done to increase efficiency.
The +12 V output is rectified using four IPP023N04N MOSFETs, each one capable of handling up to 90 A at 100° C in continuous mode, or up to 400 A at 25° C in pulse mode, with an RDS(on) of only 2.3 mΩ.
The +5 V and +3.3 V power supplies are located in two individual printed circuit boards, and each one uses an APW7073 PWM controller and four STD85N3LH5 MOSFETs, each one capable of handling up to 80 A at 25° C or 55 A at 100° C in continuous mode, or up to 320 A at 25° C in pulse mode, with an RDS(on) of 4.2 mΩ.
The secondary transistors are controlled by a PS232S chip, which supports over voltage (OVP), under voltage (UVP), and over current (OCP) protections. There are four +12 V over current channels available, but the manufacturer decided to use only one of them, thus making this unit a single-rail design.
The electrolytic capacitors used in the secondary are also Japanese, from Chemi-Con, and labeled at 105° C, as usual.
[nextpage title=”Power Distribution”]
Figure 18 shows the power supply label containing all the power specs.
This power supply uses a single-rail design, so there is not much to talk about here.
Let’s now see if this power supply can really deliver 750 W.
[nextpage title=”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 differe
nt 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 +12VB inputs were connected to the power supply’s single +12 V rail.
|Input||Test 1||Test 2||Test 3||Test 4||Test 5|
|+12VA||5 A (60 W)||11 A (132 W)||16 A (192 W)||22 A (264 W)||27 A (324 W)|
|+12VB||5 A (60 W)||10 A (120 W)||16 A (192 W)||21 A (252 W)||27 A (324 W)|
|+5 V||2 A (10 W)||4 A (20 W)||6 A (30 W)||8 A (40 W)||11 A (55 W)|
|+3.3 V||2 A (6.6 W)||4 A (13.2 W)||6 A (19.8 W)||8 A (26.4 W)||11 A (36.3 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||147.1 W||296.6 W||444.9 W||591.9 W||748.4 W|
|% Max Load||19.6%||39.5%||59.3%||78.9%||99.8%|
|Room Temp.||45.2° C||45.0° C||46.9° C||47.2° C||46.8° C|
|PSU Temp.||45.9° C||46.2° C||46.8° C||48.0° C||48.9° C|
|Ripple and Noise||Pass||Pass||Pass||Pass||Pass|
|AC Power||168.5 W||332.2 W||499.2 W||674.0 W||869.0 W|
|AC Voltage||116.1 V||114.4 V||112.8 V||110.4 V||108.8 V|
The SilverStone Strider Gold Evolution 750 W can really deliver its labeled wattage at high temperatures.
Efficiency was between 86.1% and 89.3% during our tests. At our full load test, efficiency was a bit below the 87% minimum promised by the 80 Plus Gold certification. If you follow our reviews, you know that temperature plays a major role in efficiency. The higher the temperature, the lower the efficiency. During this test, the AC voltage dropped below 115 V, which also affects efficiency.
Voltage regulation was very good, with all voltages closer to their nominal values than required (three percent regulation), except the -12 V output during all tests, the +3.3 V output during test five (at +3.20 V), and the +5VSB output during tests four and five (at +4.84 V and +4.79 V, respectively). These outputs were still inside the allowed range. 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.
Let’s discuss the ripple and noise levels on the next page.
[nextpage title=”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 Gold Evolution 750 W provided extremely low ripple and noise levels, as you can see in the table below.
|Input||Test 1||Test 2||Test 3||Test 4||Test 5|
|+12VA||16.0 mV||21.8 mV||26.8 mV||28.2 mV||35.0 mV|
|+12VB||24.2 mV||29.4 mV||34.8 mV||40.4 mV||47.8 mV|
|+5 V||9.2 mV||9.6 mV||10.4 mV||11.2 mV||14.2 mV|
|+3.3 V||8.6 mV||9.8 mV||10.0 mV||11.4 mV||13.4 mV|
|+5VSB||10.2 mV||11.4 mV||12.6 mV||14.8 mV||17.4 mV|
|-12 V||50.6 mV||57.6 mV||63.8 mV||58.8 mV||68.4 mV|
Below you can see the waveforms of the outputs during test five.
Let’s see if we can pull more than 750 W from this unit.
[nextpage title=”Overload Tests”]
Below you can see the maximum we could pull from this power supply. We couldn’t pull more, as the power supply would shut down, showing that its protections are present and working fine. During this extreme configuration, noise and ripple levels were still extremely low. The +3.3 V and +5VSB outputs dropped below the minimum allowed, at +3.12 V and +4.73 V, respectively. The +5 V output dropped to +4.82 V, still inside the allowed range.
|+12VA||33 A (396 W)|
|+12VB||33 A (396 W)|
|+5 V||20 A (100 W)|
|+3.3 V||20 A (66 W)|
|+5VSB||3 A (15 W)|
|-12 V||0.5 A (6 W)|
|% Max Load||126.6%|
|Room Temp.||45.4° C|
|PSU Temp.||49.8° C|
|AC Voltage||104.2 V|
[nextpage title=”Main Specifications”]
The main specifications for the SilverStone Strider Gold Evolution 750 W power supply include:
- Standards: ATX12V 2.3
- Nominal labeled power: 750 W continuous, 850 W peak at 40° C
- Measured maximum power: 949.4 W at 45.4° C
- Labeled efficiency: Between 88% and 91%, 80 Plus Gold certification
- Measured efficiency: Between 86.1% and 89.3%, at 115 V (nominal, see complete results for actual voltage)
- Active PFC: Yes
- Modular Cabling System: Yes, full
- Motherboard Power Connectors: One 20/24-pin connector and two sets of two ATX12V connectors that together form an EPS12V connector
- Video Card Power Connectors: Two six-pin connectors and two six/eight-pin connectors on four cables
- SATA Power Connectors: Eight on two cables
- Peripheral Power Connectors: Six on two cables
- Floppy Disk Drive Power Connectors: Two on two cables
- Protections (as listed by the manufacturer): Over current (OCP), over voltage (OVP), under voltage (UVP), over power (OPP), over temperature (OTP), no load (NLP), and short circuit (SCP)
- Are the above protections really available? Yes.
- Warranty: Three years
- More Information: https://www.silverstonetek.com
- Average Price in the US*: USD 160.00
* Researched at Newegg.com on the day we published this review.
The SilverStone Strider Gold Evolution 750 W proved to be an excellent power supply, with efficiency up to 89.3%, extremely low noise and ripple levels, and decent (but not “flawless”) voltage regulation. The highlights of this power supply also include a full modular cabling system with an excellent configuration for a 750 W product (four video card cables and eight SATA power cables), a high-end fan, and a magnetic fan filter, which is a terrific idea. To top all of this, this unit is offered at an excellent price for an 80 Plus Gold unit (USD 160), costing less than its main competitor, the FSP Aurum CM Gold 750 W (USD 175).