PC Power & Cooling Silencer 750 Quad CF-Edition

5Vsb Results

5Vsb Test Results
Percentage	Ampere	Wattage	Wattage (All Rails)
10%	0.24	1.21	75.61
20%	0.48	2.4	150.82
30%	0.71	3.54	225.52
40%	0.95	4.71	299.69
50%	1.19	5.88	373.43
60%	1.43	7.02	446.52
70%	1.67	8.18	519.14
80%	1.9	9.23	591.04
90%	2.14	10.34	662.41
100%	2.38	11.42	732.52

With the power supply totally shut down through the switch on the back it still used up to 0.13W from the power grid. This isn't the first time we've seen such behavior, but it is somewhat undesirable. Some power supplies still use energy even in this state, which normally should not occur since the switch is obviously turned off. With the switch on and the power cord connected the power supply uses up to 0.8W on 115VAC, which is still good since up to 2W is allowed by the Energy Star version 4.0 specifications.

If you connect the PSU to a computer it will probably use more energy since there are functions on the mainboard that will draw a bit of power in standby mode. We test the standby efficiency with loads of 0.1, 0.5, and 3 ampere. In any case it should have more than 50% efficiency.



The Silencer 750 Quad had an excellent standby efficiency with up to 85%.





Under heat influence the 5Vsb rail had problems just like the 5V rail. It went down and almost reached the bottom limit. At room temperature the result is different and we see a curve that actually begins going up again after the 60% load. This occurs because the fan begins pulling more air through since it's turning faster, and at room temperatures this helps cool the internals better than in our stress scenarios.