I received a Kill-A-Watt meter for Christmas this year, so I decided to do some testing:
K6-2 test system: As described below
Relisys 15" CRT (built Nov. 97): 75 watt active, 4 watt standby
Computer-idle on desktop: 42 watt
Computer-100% CPU load: 67 watt
CD-ROM drive spinup: Add 6 watts to previous totals.
Hard Drive in standy: Subtract 3 watts (per hd) from previous totals.
Floppy Drive: forgot to test.
Pentium M test System: Dell Inspiron 1200: 1.4Ghz Pentium M, Banias core, underclocked/undervolted @ 600MHz/0.700volt. 256MB DDR pc2700 ram, 30GB 4200rpm 2.5" hdd, 14" screen, CD-RW/DVD-ROM combo drive, factory 18V 62 watt max AC adapter.
laptop at lowest screen brightness, idle: 11 watt
full brightness, idle: 17 watt
CPU @ 100% load, lowest screen brightness: 15 watt
laptop in standby mode: 1 watt
combo drive spinning, laptop with lowest screen brightness: 15 watt
laptop idle, lowest screen brightness, with hdd in standby: 9 watt
Wi-fi add in card: 1 watt
I'll test my Pentium D system when I get home.
K6-2 test system: As described below
Relisys 15" CRT (built Nov. 97): 75 watt active, 4 watt standby
Computer-idle on desktop: 42 watt
Computer-100% CPU load: 67 watt
CD-ROM drive spinup: Add 6 watts to previous totals.
Hard Drive in standy: Subtract 3 watts (per hd) from previous totals.
Floppy Drive: forgot to test.
Pentium M test System: Dell Inspiron 1200: 1.4Ghz Pentium M, Banias core, underclocked/undervolted @ 600MHz/0.700volt. 256MB DDR pc2700 ram, 30GB 4200rpm 2.5" hdd, 14" screen, CD-RW/DVD-ROM combo drive, factory 18V 62 watt max AC adapter.
laptop at lowest screen brightness, idle: 11 watt
full brightness, idle: 17 watt
CPU @ 100% load, lowest screen brightness: 15 watt
laptop in standby mode: 1 watt
combo drive spinning, laptop with lowest screen brightness: 15 watt
laptop idle, lowest screen brightness, with hdd in standby: 9 watt
Wi-fi add in card: 1 watt
I'll test my Pentium D system when I get home.