Energy Costs: When Cool'n'Quiet Mode Doesn’t Work
How high do electrical costs go if the Cool’n’Quiet feature can’t be activated? We make the assumption that the computer is left in standby for about 6 hours a day, and calculate the additional electricity costs for the whole year. We used a cost of 19 cents per kilowatt-hour.
The BE processor that had the lowest electrical intake out of all tested models had a cost increase of $3 (1.90 Euros) per year when Cool’n’Quiet mode was not activated. An FX 62 user can expect to pay $15.40 (10 Euros) more per year.
The Phenom processor uses twice as much electricity as others when in Cool’n’Quiet mode, but shows only a small difference in power costs without it. You can expect to pay $6.24 (4.05 Euros) more per year when Cool’n’Quiet mode is not active.
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my media centre based on a 3700+ (S939, single core san diego, 1MB, 2.2GHz) only uses 56-58W while running rosetta@home! That's including 1.25GB DDR (3 sticks), a freeview TV tuner, and a 2GB compactflash card on a Seasonic S12 330W PSU. It's undervolted as far as it'd go though...
What about performance per watt comparisons, which would have been the best comparison you could have made in such an article.
If you had a system that consumed 300W of power (forget about idle and full load differences for this question!!) with a 500W PSU, what would your power consumption be for the purpose of energy bill calculation?
Am I correct in believing that the rating of your PSU is the maximum power it can supply, and that it only actually draws what the system asks for? So in this case, your overall system power use would be 300W?
So, if you install a much more powerful PSU than you currently need (for the sake of future SLI upgrades) you wouldn't be wasting electricity?