Silverstone Strider Essential Series (SST-ST60F-ESB) 600W Review

Load Testing

5 V SB Tests

The 5VSB rail in Silverstone Strider Essential Series 600 W is rated for 2.5 A, but we were able to overload it to 3.5 A. Efficiency started just slightly over 70 % and reached 76 % when overloaded. Nothing spectacular, the old topology determines that, and now the PSU is new, when the capacitors start failing, those will be things happening…

Output (W)  Load (A) Voltage (V)/ ripple (mV) Input (W) Efficiency/power factor
0 0 5.16/0.509 0.5 —/1
12.16 2.42 5.03/1.43 16.0 71.5 %/0.43
16.70 3.35 4.98/1.30 22.0 75.9 %/0.46

On the other hand the ripple was one of the lowest I have seen so far, under 1 mV without load and even with a load it was always under 2 mV. Very interesting. But the voltage regulation was worse. It starts pretty high and only drops under 5V when overloaded.

5 V Sb 0 A 25 5 V Sb 242 A 0 5 V Sb 335 A 0

Ripple of +5 V SB, from left: 0 A, 2.42 A, 3.35 A

Load Tests

Test 1 (36.26W Load)

Rail Load Voltage Ripple
12V 1.91A 12.15V 30.0mV
5V 0.33A 5.22V 24.4mV
3.3V 1.49A 3.38V 42.4mV
−12V 0.32A −11.57V 31.2mV
5Vsb 0.52A 5.15V 20.8mV
AC Power 51.5W
Efficiency 70.4%
Power Factor 1.0
Intake Temp 26°C
Exhaust Temp 28°C

Test 2 (122.14W Load)

Rail Load Voltage Ripple
12V 7.19A 12.2V 32.8mV
5V 3.52A 5.14V 39.2mV
3.3V 2.94A 3.38V 68.8mV
−12V 0.32A −11.84V 33.6mV
5Vsb 0.51A 5.11V 31.2mV
AC Power 140.5W
Efficiency 86.9%
Power Factor 0.89
Intake Temp 26°C
Exhaust Temp 34°C

Test 3 (235.66W Load)

Rail Load Voltage Ripple
12V 14.89A 12.15V 30.4mV
5V 6.12A 5.09V 40.0mV
3.3V 4.67A 3.38V 64.0mV
−12V 0.31A −11.94V 92.0mV
5Vsb 1.01A 5.06V 34.4mV
AC Power 266.5W
Efficiency 88.8%
Power Factor 0.98
Intake Temp 29°C
Exhaust Temp 41°C

Test 4 (362.92W Load)

Rail Load Voltage Ripple
12V 22.57A 12.2V 24.4mV
5V 9.48A 5.04V 33.6mV
3.3V 8.71A 3.38V 26.4mV
−12V 0.32A −12.05V 54.4mV
5Vsb 1.49A 5.03V 44.8mV
AC Power 405.0W
Efficiency 89.9%
Power Factor 0.99
Intake Temp 30°C
Exhaust Temp 47°C

Test 5 (472.21W Load)

Rail Load Voltage Ripple
12V 29.97A 12.16V 32.8mV
5V 11.18A 5.0V 64.0mV
3.3V 11.61A 3.32V 56.8mV
−12V 0.31A −12.1V 55.2mV
5Vsb 1.92A 4.99V 57.6mV
AC Power 534.5W
Efficiency 88.4%
Power Factor 0.99
Intake Temp 33°C
Exhaust Temp 46°C

Test 6 (602.11W Load)

Rail Load Voltage Ripple
12V 39.81A 12.15V 40.0mV
5V 12.47A 5.09V 66.4mV
3.3V 12.65A 3.36V 65.6mV
−12V 0.32A −12.16V 56.0mV
5Vsb 2.37A 4.94V 76.0mV
AC Power 684.5W
Efficiency 88.0%
Power Factor 1.0
Intake Temp 35°C
Exhaust Temp 53°C

Crossload Test 1 (109.37W Load)

Rail Load Voltage Ripple
12V 1.76A 12.22V 22.8mV
5V 1.51A 5.12V 24.8mV
3.3V 21.46A 3.46V 29.6mV
−12V 0.28A −11.7V 28.0mV
5Vsb 0.51A 5.10V 28.0mV
AC Power 143.0W
Efficiency 76.5%
Power Factor 0.9
Intake Temp 28°C
Exhaust Temp 34°C

Crossload Test 2 (138.23W Load)

Rail Load Voltage Ripple
12V 1.77A 12.72V 31.6mV
5V 21.65A 4.84V 31.2mV
3.3V 1.45A 3.36V 27.2mV
−12V 0.29A −12.22V 36.8mV
5Vsb 0.51A 5.1V 28.8mV
AC Power 174.0W
Efficiency 79.4%
Power Factor 0.94
Intake Temp 28°C
Exhaust Temp 34°C

Crossload Test 3 (560.05W Load)

Rail Load Voltage Ripple
12V 45.8A 11.81V 25.6mV
5V 1.56A 5.27V 35.2mV
3.3V 1.4A 3.33V 38.4mV
−12V 0.33A −11.94V 23.6mV
5Vsb 0.46A 5.07V 52.8mV
AC Power 629.0W
Efficiency 89.0%
Power Factor 0.99
Intake Temp 34°C
Exhaust Temp 45°C

Overload Test (841.23W Load)

Rail Load Voltage Ripple
12V 53.0A 12.26V 59.2mV
5V 3.29A 4.76V 172.0mV
3.3V 19.22A 3.26V ?
−12V 0.29A −12.45V ?
5Vsb 3.28A 4.85V ?
AC Power 1015.0W
Efficiency 82.9%
Power Factor 1.0
Intake Temp 41°C
Exhaust Temp 73°C

The 12V rail had maximum and minimum values of 12.2V and 12.1V respectively, giving us 0.2V (or 1.66%) Line regulation and 0.1V (0.83%) Variation, or load regulation. The 5V rail started  near the maximum allowed in ATX specs at 5.22V and dropped to 4.99V, giving us 0.22V (4.4%) Line regulation and 0.23V (4.6V) Variation. Last but not least, the 3.3V rail had maximum and minimum values of 3.38 and 3.32V respectively, giving us 0.08V (2.42%) line regulation and 0.06V (1.82%) Variation. This is a great result on the 12V rail, a good result on the 3.3V rail, and a very average result on the 5V rail.

Below 40W load, PFC controller constantly cycled between being on and off and the power meter could not accurately measure the power draw. Just under 40 W the PFC was running almost constantly and I was able to read the input power, but even then we do not guarantee the precision – the efficiency may be somewhat higher than 70 % measured. In subsequent tests it climbed over 80 % and peaked at just under 90 %. But the fan curve is oriented towards silence, rather than cooling, so the power supply runs quite hot. Over 50 °C is very high, especially with those capacitors in there.

In addition to the progressive load tests, three crossload tests were also performed. In the first test, with the 3.3V rail being loaded heavily, its voltage was high, but still just barely in spec. In the second test (with the 5V rail loaded heavily), the 12V rail went too high, and in the third test (with the 12V rail loaded heavily), the 5V rail was too high. Although this result is poor, it’s typical of group-regulated designs. I was also able to overload the power supply to about 840W – a full 240W above its rating. Under this test, the 12V rail voltage kept dropping and the unit would shut down. The voltages were in spec, but the ripple had gone through the roof on the 5V rail and the exhaust air temperature was a scorching 73°C


Rail Test 1 (36.26W) Test 6 (601.11W)
5V  5 V 63  5 V 64
3.3V  33 V 63  33 V 64
−12V  12 V 63  12 V 64
5Vsb  5 V Sb 62  5 V Sb 63

Quite a disaster. The worst is 3.3V rail (which usually powers memory modules) – besides Tests 1 and 4, it is out of spec. I found it hard to believe that Silverstone would sell a power supply with out of spec ripple like this, so we tried moving things around to rule out interference, but the source of the ripple was definitely the power supply. Other reviews (such as on TechPowerUp) have found the same problem. The 5V and 5VSB rails were also out of spec at 80% and 100% load. The 12V rail, on the other hand, had ripple below half the maximum allowed at all times. Note that these tables are a bit different to how Callum (c_hegge) did them. On these tables, the yellow waveform (CH-1) is the rail in the corresponding row in the table. The light blue waveform (CH-2) is the 12V rail on all of the shots.

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