iMac: Power consumption and thermal output (BTU) information

Summary

Learn about the power consumption and thermal output of iMac computers.

iMac (Late 2011)
iMac (21.5-inch, Late 2011)
21.5-inch display, 3.1GHz Intel Core i3, 2GB 1333MHz DDR3 SDRAM - 2x2GB, 250GB Serial ATA hard drive, AMD Radeon HD 6750M graphics
Power Consumption		Thermal Output
Idle	CPU Max	Idle	CPU Max
80 W	101 W	273 BTU/h	345 BTU/h

iMac (Mid 2011)
iMac (21.5-inch, Mid 2011)
21.5-inch display, 2.5GHz Intel Core i5, 4GB 1333MHz DDR3 SDRAM - 2x2GB, 500GB Serial ATA hard drive, AMD Radeon HD 6750M graphics
Power Consumption		Thermal Output
Idle	CPU Max	Idle	CPU Max
81 W	106 W	276 BTU/h	362 BTU/h

iMac (21.5-inch, Mid 2011)
21.5-inch display, 2.7GHz Intel Core i5, 4GB 1333MHz DDR3 SDRAM - 2x2GB, 1TB Serial ATA hard drive, AMD Radeon HD 6770M graphics
Power Consumption		Thermal Output
Idle	CPU Max	Idle	CPU Max
85 W	114W	290 BTU/h	389 BTU/h

iMac (27-inch, Mid 2011)
27-inch display, 2.7GHz Intel Core i5, 4GB 1333MHz DDR3 SDRAM - 2x2GB, 1TBGB Serial ATA hard drive, AMD Radeon HD 6770M graphics
Power Consumption		Thermal Output
Idle	CPU Max	Idle	CPU Max
135 W	170 W	461 BTU/h	580 BTU/h

iMac (27-inch, Mid 2011)
27-inch display, 3.1GHz Intel Core i5, 4GB 1333MHz DDR3 SDRAM - 2x2GB, 1TB Serial ATA hard drive, AMD Radeon HD 6970M graphics
Power Consumption		Thermal Output
Idle	CPU Max	Idle	CPU Max
139 W	195W	474 BTU/h	665 BTU/h

iMac (27-inch, Mid 2011)
27-inch display, 3.4GHz Intel Core i7, 4GB 1333MHz DDR3 SDRAM - 2x2GB, 1TB Serial ATA hard drive, AMD Radeon HD 6970M graphics
Power Consumption		Thermal Output
Idle	CPU Max	Idle	CPU Max
142 W	200W	485 BTU/h	682 BTU/h

iMac (Mid 2010)
21.5-inch display, 3.6GHz Intel Core i5, 4GB 1333MHz DDR3 SDRAM - 2x2GB, 1TB Serial ATA hard drive, ATI Radeon 4670 graphics
Power Consumption		Thermal Output
Idle	CPU Max	Idle	CPU Max
94W	241W	321 BTU/h	822 BTU/h

iMac (27-inch, Mid 2010)
27-inch display, 3.2GHz Intel Core i3, 4GB 1333MHz DDR3 SDRAM - 2x2GB, 1TB Serial ATA hard drive, ATI Radeon 5670 graphics
Power Consumption		Thermal Output
Idle	CPU Max	Idle	CPU Max
*	365W	*	1,245 BTU/h

iMac (27-inch, Mid 2010)
27-inch display, 3.6GHz Intel Core i5, 4GB 1333MHz DDR3 SDRAM - 2x2GB, 1TB Serial ATA hard drive, ATI Radeon 5670 graphics
Power Consumption		Thermal Output
Idle	CPU Max	Idle	CPU Max
145 W	365	495 BTU/h	1,245 BTU/h

iMac (Late, 2009)
iMac (21.5-inch, Late 2009)
21.5-inch display, 3.33GHz Intel Core 2 Duo, 4GB 1066MHz DDR3 SDRAM - 2x2GB, 500GB Serial ATA hard drive, NVIDIA GeForce 9400M graphics
Power Consumption		Thermal Output
Idle	CPU Max	Idle	CPU Max
104 W	241 W	355 BTU/h	822 BTU/h

iMac (21.5-inch, Late 2009)
21.5-inch display, 3.2GHz Intel Core i3, 4GB 1333MHz DDR3 SDRAM - 2x2GB, 1TB Serial ATA hard drive, NVIDIA GeForce 9400M graphics
Power Consumption		Thermal Output
Idle	CPU Max	Idle	CPU Max
104 W	241 W	355 BTU/h	822 BTU/h

iMac (27-inch, Late 2009)
27-inch display, 3.06GHz Intel Core 2 Duo, 4GB 1066MHz DDR3 SDRAM - 2x2GB, 1TB Serial ATA hard drive, ATI Radeon 4670 graphics
Power Consumption		Thermal Output
Idle	CPU Max	Idle	CPU Max
*	365 W	*	1,245 BTU/h

iMac (27-inch, Late 2009)
27-inch display, 3.33GHz Intel Core 2 Duo, 4GB 1066MHz DDR3 SDRAM - 2x2GB, 1TB Serial ATA hard drive, ATI Radeon 4670 graphics
Power Consumption		Thermal Output
Idle	CPU Max	Idle	CPU Max
*	365W	*	1,245 BTU/h

iMac (27-inch, Late 2009)
27-inch display, 2.66GHz Quad-core Intel i5, 4GB 1066MHz DDR3 SDRAM - 2x2GB, 1TB Serial ATA hard drive, ATI Radeon 4850 graphics
Power Consumption		Thermal Output
Idle	CPU Max	Idle	CPU Max
145 W	365	*	1,245 BTU/h

iMac (20-inch, Early 2009)
20-inch display, 2.66GHz Intel Core 2 Duo, 2GB 1066MHz DDR3 SDRAM - 2x1GB, 320GB Seral ATA hard drive, NVIDIA GeForce 9400M graphics
Power Consumption		Thermal Output
Idle	CPU Max	Idle	CPU Max
60.7 W	108.9 W	206.4 BTU/h	371.6 BTU/h

iMac (24-inch, Early 2009)
24-inch display, 2.66GHz Intel Core 2 Duo, 4GB 1066MHz DDR3 SDRAM - 2x2GB, 640GB Seral ATA hard drive, NVIDIA GeForce 9400M graphics
Power Consumption		Thermal Output
Idle	CPU Max	Idle	CPU Max
104.4 W	151.5 W	355 BTU/h	515.2 BTU/h

iMac (24-inch, Early 2009)
24-inch display, 2.93GHz Intel Core 2 Duo, 4GB 1066MHz DDR3 SDRAM - 2x2GB, 640GB Serial ATA hard drive, NVIDIA GeForce GT 120 graphics
Power Consumption		Thermal Output
Idle	CPU Max	Idle	CPU Max
116.4 W	192.2 W	395.8 BTU/h	653.5 BTU/h

iMac (24-inch, Early 2009)
24-inch display, 3.06GHz Intel Core 2 Duo, 4GB 1066MHz DDR3 SDRAM - 2x2GB, 1TB Serial ATA hard drive, NVIDIA GeForce GT 130 graphics
Power Consumption		Thermal Output
Idle	CPU Max	Idle	CPU Max
113.9 W	208.9 W	387.3 BTU/h	710.3 BTU/h

iMac (24-inch, Early 2009)
24-inch display, 3.06GHz Intel Core 2 Duo, 4GB 1066MHz DDR3 SDRAM - 2x2GB, 1TB Serial ATA hard drive, ATI Radeon HD 4850 graphics
Power Consumption		Thermal Output
Idle	CPU Max	Idle	CPU Max
125.5 W	215.7 W	426.7 BTU/h	733.4 BTU/h

Notes

Power consumption data (watts) is measured from the wall power source and includes all power supply and system losses. Additional correction is not needed.
"CPU Max" is defined as running a compute-intensive test application that maximizes processor usage and therefore power consumption.
These numbers reflect a 23°C (73.4° F) ambient running environment. Increased ambient temperatures will require faster fan speeds which will increase power consumption. At 35° C (95° F), 50 W should be added to reflect increased power consumption.
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