Measuring Energy Efficiency
efficient computers are a good thing, so it helps to know how power efficient,
or power hungry different parts of a computer are when stressed with different
tasks. Since it is very difficult to isolate a videocard or CPU and measure
power draw separately, PCSTATS measures total system power draw with the aid of
an Extech 380803 AC Power Analyzer and A-PFC compliant PC Power and Cooling 750W power supply. The meter is
placed between the 120V AC outlet and the PC power supply. By stressing the test
platform's graphics solution or processor, it's then possible to measure power
draw relative to the PC at an idle state.
system is measured at Idle (Windows desktop), Graphics Loaded (3Dmark06) and CPU
Loaded (Prime 95) states.
Total System Power Draw
nVidia Geforce GTS250
||(via 3Dmark 06)
it's packing a Phenom II 955 Black Edition, the Gigabyte GA-MA785GMT-UD2H still
has a fair amount of power draw at idle, and that number will grow a bit when a
graphics card is added in. When the system is put under 3D load, the IGP draws
35W over the normal load, which is quite convservative. Pairing a system like
this up with a 3D graphics card is also possible, as long as your power supply
is rated for at least 400W.