Source: Tom's Hardware – Keywords: amd, power, cpu
Categories: Hardware
Energy Consumption: The Processor and Cool'n'Quiet Mode
Let’s start with the measurements that were taken with the processor in standby mode, with Cool’n’Quiet mode activated. In this case, the CPU switches down to the lowest possible clock rate, and depending on which CPU model is used, may also deactivate some core items and then tells the motherboard to lower the core voltage. In this case the core is lowered to 1.0 V.
In order for Cool’n’Quiet mode to work, it must be activated via the BIOS. In most cases, though, it is activated by default.
The operating system must also offer a way for the processor’s clock rate to be lowered. With Vista, in the “Control Panel”, an option called “Energy Options” is selected and changed to “Energy save mode”.
Choosing the energy saving mode lowers the CPU’s clock rate
The unburdened processor will, if the motherboard and operating system do not conflict, fall into Cool’n’Quiet mode and dynamically lower its clock rate. A Cool’n’Quiet driver is necessary for Windows XP users; it can be downloaded
The Phenom uses twice as much energy and comes in last place, while the new “e” models live up to their names and achieve new bests. Because the Sempron 64 processors only have one core, they trail behind the classic Athlon 64 X2 models. The combined values give the logical succession that is seen on the chart.
- Previous page Testing 35 AMD Processors
- Next page Energy Consumption: Cool’n’Quiet and...
Best offers
- Help me buy a new PC
- The reason Tivo is 'on' all the time
- DELL SUCKS
- Does this sound like a decent Gaming computer? (for the price)
- HELP WITH COMPAQ 5000
- which system
- XG Desktop pc, any good?
- Dual Processor Vs Dual Core
- I need advice or help for LCD 22" or 24",
- Dual 19" on 7600GT Graphic Design/Gamimg
- vista control panel
- control panel vista problem
- processor of a motherboard
- amd run one core
- get out of standby windows xp
- vista control panel not working
- vista control panel open
- best processor motherboard combination
- how to get out of standby mode xp
- how to lower cpu clock
- motherboard lower power consumption
- new motherboard no operating system
- amd drivers
- how can i tell if my motherboard is going
- what the best processor for my motherboard
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?