Date: Tue, 30 Dec 2003 08:37:44 +0800 From: Erich Dollansky <oceanare@pacific.net.sg> To: Martin Cracauer <cracauer@cons.org> Cc: Tim Kientzle <kientzle@acm.org> Subject: Re: Power consumption in desktop computers Message-ID: <3FF0C8D8.3040205@pacific.net.sg> In-Reply-To: <20031229170255.A87023@cons.org> References: <20031225224609.A5326@cons.org> <3FEF2D62.8010906@acm.org> <20031229170255.A87023@cons.org>
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Hi, Martin Cracauer wrote: > Tim Kientzle wrote on Sun, Dec 28, 2003 at 11:22:10AM -0800: > >>Ouch! I've tested a bunch of 'business-grade' desktops around >>my office, and they all run 40-60 watts during normal use (not >>including monitor) with peak power at boot time up to 70-80 watts. >>This includes some P4s with lots of memory, CD-RWs, etc. >>(The one exception is an AMD Duron system; it seems that >>the AMD processors are uniformly power-hungry.) > > > I wonder how that works. > > I finally got ahold of a datasheet of P-4 power consumption: > http://support.intel.com/support/processors/pentium4/sb/CS-007999.htm#Table2 > The table shows the Processor Thermal Design Power. The CPU will dissipate much less during normal operation and can dissipate even a bit more as worse case. This number is important to the hardware developer only. The actual power can go down to less than 10% if the CPU is idle. > Are these business-grade ones maybe equipped with mobile P-4s? No, it is just the fact that modern CPU are most of the time just idle. Erich
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