by birchm » Sun 30 Apr 2006, 21:51:04
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')For PC's, I'd say at least setting the monitor power-saving mode helps a lot, especially for cheapos like me who can't afford (and don't want) LCD panels and have stuck with CRT's. Set to 5 or 10 minutes, and it's off.
The PC itself takes a lot less power than the monitor especially if you're running anything newer/better than Windows 95/98. Windows NT and XP (and 2003 should as well) come with a "System Idle Process" that issues the HLT instruction (HALT, actually) when doing nothing in particular.
Oh, and if you're actually going to buy a new CPU, avoid the Intel Pentium 4's, *especially* the P4E's - they're the V8 energy guzzlers of the processor world nowadays. The AMD64's are cheaper, run faster in most applications except XVID, MP3 encoding (who does that all the time anyway), run cooler and use much less energy.
Mine's an AMD64, it runs at 41 degC idle, 44-46 degC running 3D games, and up to 56 degC XVID encoding. Intel P4E's typically run at over 50 degC *while idle*. And heat up over 60-70 degC, guzzling way over 100W at full throttle.
Newest generation Pentium chips (Pentium D, and Core Solo/Duo) are much more power efficient than previous generation Pentium 4s and Athlon 64s. Major things which will eat power alive in computers besides processors include cheap power supplies, monstrous video cards, and high-speed hard drives. This can be mitigated (like with major appliances and most electronics) by purchasing name brand components, going for value-edition video cards which are based on modern small-channel processing yet don't have massive clock speeds, and sticking with modern drives with fluid bearings. Newer hardware is much more energy efficient.
Also, the statement about a computer's tower taking up less power than a 100-watt CRT is just plain false.
This link can help you calculate just how much power your computer uses. Changing to an LCD will save you a good amount of power. They use somewhere on a range of 1/3 the power as a CRT. Like a CF lightbulb, it saves you money in the long run.
As a general rule with semiconductor electronics, power consumption is controlled by the following factors:
channel width (smaller is better)
clock frequency (lower is better)
die size (smaller is better)
source voltage (lower is better)