Electricity Use Information

Here is some information about how much electricity various computers use (as gathered by the Luce Grant interns in the summer of 2006).

You might also be interested in the 2005 Jesup energy use spreadsheet that's attached.

Stats on Desktop Computer Electricity Usage

Make/Model	max energy use (watts)	on and idle	standby	off	idle as % of max	Reference
mac g4	338	113	10		33 %	http://support.apple.com/specs/powermac/Power_Mac_G4_Digital_Audio.html; http://www.macalester.edu/its/faq/power_usage.html
mac g5	604	185	16	2	31 %	http://docs.info.apple.com/article.html?artnum=32486; http://images.apple.com/environment/resources/pdf/apes_PMG5_2-22-06.pdf
mac mini	110	22	2	1.1	20 %	http://www.apple.com/macmini/whatsinside.html
imac g4 15	180	46	2.3	1	26 %	http://www.macalester.edu/its/faq/power_usage.html
imac g5 17	180	58	4	1	32 %	http://shopper.cnet.com/4014-3118_9-31517973.html?pbrpt=4582&cip=1; http://lancej.blogspot.com/2006/03/pc-electricity-consumption.html
imac g5 20	180	60	4	1	33 %	http://shopper.cnet.com/4014-3118_9-31556109.html?pbrpt=4582&cip=1
imac intel 17	180	55	4	1	31 %	http://images.apple.com/environment/resources/pdf/apes_imac_2-27-06.pdf
dell optiplex gx260	84	35	3	2	42 %	http://www.dell.com/downloads/global/corporate/environ/Opti_GX260SF.pdf
dell optiplex gx270	115	51	2.5	1.7	44 %	http://www.dell.com/downloads/global/corporate/environ/Opti_GX270SFF.pdf
dell optiplex gx280	193.95	162.21	1.77	1.02	84 %	http://www.dell.com/downloads/global/corporate/environ/Opti_GX280_DT.pdf
dell optiplex gx400	250				0 %	http://support.dell.com/support/edocs/systems/opgx400/en/UG/ch4.htm
dell optiplex gx620	120.65	65.85	2.38	2.47	55 %	http://www.dell.com/downloads/global/corporate/environ/Opti_GX620_SFF.pdf
dell precision 410	330				0 %	http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6884555741&category=42020
dell precision 450	184.02	120.82	4.51	3.95	66 %	http://www.dell.com/downloads/global/corporate/environ/Prec_450.pdf
dell precision 470	340.76	274.22	3.72	2.78	80 %	http://www.dell.com/downloads/global/corporate/environ/Prec_470.pdf
Averages	226	96	4.6	1.75	44 %
			5 %	2 %

Stats on Laptop Computer Electricity Usage

Make/Model	max energy use (watts)	on and idle	standby	off	idle as % of max	Reference
macbook pro 15	85	27	2.5	2	32 %
powerbook g4 15	85	18	2	1	21 %	http://www.macalester.edu/its/faq/power_usage.html; http://lancej.blogspot.com/2006/03/pc-electricity-consumption.html
compaq presario 2200 15	46.095	32.23	1.33	0.55	70 %
dell latitude cp1	46.095	32.23	1.33	0.55	70 %	average of other dell models (d400, d500, d505, d600, d620, d610)
dell latitude d400	45.85	24.17	1.63	0.34	53 %	http://www.dell.com/downloads/global/corporate/environ/Lat_D400.pdf
dell latitude d600 14.1	57.37	34.63	2.48	0.9	60 %	http://www.dell.com/downloads/global/corporate/environ/Lat_D600.pdf
dell latitude d620	42.34	29.21	0.22	0.23	69 %	http://www.dell.com/downloads/global/corporate/environ/Lat_D620.pdf
hp 14	46.095	32.23	1.33	0.55	70 %
hp 17	46.095	32.23	1.33	0.55	70 %
ibm 14	46.095	32.23	1.33	0.55	70 %
ibook g4 14	85	18			21 %
Averages	57	28	1.5	0.7	55 %
			5 %	3 %

Laptop Compared to Desktop Electricity Usage

	max energy use	on and idle	standby	off
Compare laptop vs. desktop	25 %	30 %	33 %	41 %