Power Consumptions of Various Devices

With the help of a power meter like the P3 Kill A Watt...

I was surprised that most electronics consume very little power. In particular, I was pleased to find that most electronics consume 0 W (rounded to the nearest watt because of the meter’s precision) when powered off in a normal fashion (other than by unplugging).

Computer equipment

• Desktop computer (Nayuki):
  • Idle: 123 W, 200 VA
  • Full CPU load: 140 W, 220 VA
  • Off: 6 W, 13 VA
• Desktop computer (Saba-tan):
  • Idle: ~50 W
  • Full CPU load: ~60 W
• Laptop computer (Hazumu):
  • Idle: 13 W (remember to add other stuff)
  • Full CPU load: 32 W (remember to add other stuff)
  • LCD display: +1–6 W (depending on backlight brightness)
  • Charging battery: +25 W
  • CPU fan: +1 W
• 19 in. LCD monitor (ViewSonic VP930b): 20 W
• 19 in. LCD monitor (BenQ FP992): 30 W
• 19 in. CRT monitor (ViewSonic GS790): ~100 W
• Flatbed scanner (Canon CanoScan 4400F):
  • Idle (with lamp on): 8 W
  • Scanning: 13 W
  • Off: 3 W
• Speakers (Logitech):
  • On: 6 W (from silence through moderate volumes)
  • Loud: ~10 W
  • Really loud: ~25 W (not willing to go further, risk of damage to me and equipment)
  • Off: 1 W
• Router (D-Link DI-604): 5 W
• DSL modem (Siemens SpeedStream 4200): 3 W

Electronics

• 27 in. CRT television (JVC): 60–90 W (depending on scene brightness)
• 14(?) in. CRT television (Prima): ~40–60 W (depending on scene brightness)
• Hi-fi stereo (Panasonic):
  • Operating: 35–40 W
  • Standby: 10 W (one of the worst)
• Video cassette recorder (Hitachi): 10–20 W
• DVD player (Koss): 13 W

Appliances

• 900 W microwave oven:
  • Full power: 1430–1460 W, ~1550 VA (remember to add lamp)
  • Standby: 1 W
  • Lamp: +20 W
• Electric kettle: ~1400 W
• Rice cooker: 640 W

Links

• Wikipedia: Watt-hour
• Wikipedia: Power factor
• P3 International: Kill A Watt

Last modified: 2008-01-09-Wed
Created: 2007-04-15-Sun