Gone are the days
when performance benchmarks settled all Intel vs. AMD processor
of the desktop computing world is palpably shifting towards power conservation,
and even individual computer users are starting to ask themselves "just how much
power is this going to use?"
it's only when we consider the 24x7x365 electrical operating cost of a computer
that these small power reductions muster any significance, but there it is. In a
sense, what's happening now parallels the transition to from loud computers to
the silent PC esthetic. Before hot-running computer processors went quiet,
enthusiasts' attempts to reduce the PC noise were exceptions to the rule, rather
than the norm.
industry now thrives on selling quiet computer hardware, could the same hold
true for energy efficient desktop processors that don't sacrifice performance?
That certainly seems to be the direction computers are headed, and frankly
this is a much overdue change.
we're all still finding our feet on the energy efficient component, but it's
certainly a new aspect PCSTATS will be considering as we mull over the benchmark
results of the Athlon64 X2 4800+ processor. Now, let's start off with total
system power draw tests.
Athlon64 X2 Total System Power Consumption Tests
The cost of energy is
increasing world wide, both monetarily and environmentally. Any reduction in the
amount of power a CPU requires is a welcome respite. Wading through the
technical numbers to figure out the differences can be confusing because Intel
and AMD report power values in slightly different ways.
AMD appears to consume more power since its values are higher, however AMD lists
its maximum power usage while Intel posts typical. Obviously the two are not comparable and to
find out which actually consumes more power, we decided to test things
Representing Intel will be the Core 2 Duo E6600, Pentium D 940, Pentium D 840, and Pentium 4 540 processors. Standing in for AMD are the
socket AM2 Athlon64 X2 4800+, Sempron 3600+, Athlon64 FX-62, Athlon64 X2 5000+, and socket 939 Athlon64 4000+ and Athlon64 FX-60 processors.
specs for each system stayed as constant as possible: Akasa PowerPlus AK-P550FF power supply, Western Digital 74GB Raptor hard drive, an 8x Gigabyte
DVD-/+RW drive and a MSI NX6600GT-TD128E videocard.
Quiet is disabled for these tests because with Cool 'n' Quiet enabled, total
system power draw will be even less that what is reported. A picture of the
total system power draw test configuration is shown at right. The Extech Power
Analyzer is located between the mains 120AC supply and the PC's power
PCSTATS uses an
Extech model 380803 Power Analyzer
Datalogger for measuring CPU power & total system power draw.
The tool can be found here if you would like
to replicate these microprocessor power measurements
single-core load, the Prime95 Small FFTs test was run, and two instances
launched for dual core loading. Total system power consumption was read with the
Extech Power Analyzer Datalogger (model 380803) for both CPU loaded and CPU idle
states. These values are measuring an entire system
while the processor is running under computational load or idle.
the socket AM2 Athlon64 X2 4800+ impact total system power draw? Let's have a