The price of energy is increasing world wide, and any reduction in the amount
of power a computer draws is welcome in our books. Power supplies which
employ power factor correction (PFC, or A-PFC) help ensure efficient conversion of
AC to DC, and reduce the amount of energy wasted as heat. The following power
tests were all conducted with an Extech Model 380803 Power
Analyzer located between the mains 120AC supply and the PC power supply.
Power jitter is measured with a Mastech MS8230B Multimeter at the device power
Here is a picture of the test set up for the PC Power &
Cooling Turbo-Cool 1KW power supply.
Power Jitter Observations -
Voltage jitter is read by
accessing the power options displayed in the motherboard BIOS, with the system obviously in an unloaded state. *All
voltages were read from the BIOS of an MSI K8N Neo4 Platinum SLI
& Cooling Turbo-Cool 1KW motherboard BIOS values are fairly stable, the 12V line jumped
around quite a bit but was nothing out of the ordinary.
Voltage Level Measurements -
The +3.3V, +5.0V, and 12V voltage levels were measured
directly with the aide of a Mastech MS8230B Multimeter. The power supply was connected to a
stock computer system operating in an unloaded state, and the voltage values were taken directly
from the power cables.
The three voltage rails that were measured are all
pretty much on the mark, or very close. The +5V rail is 0.2V below what it
should be, and the 12V rail is right on the money. Lastly, the 3.3V rail is
on the mark as well.
Next, load tests with the Seasonic PSU tester and then
our final conclusions on this unit.