iMac power consumption and thermal output
- June 7, 2024
- Apple
Table of Contents
iMac power consumption and thermal output
Learn about the power consumption and thermal output (BTU) of iMac computers.
iMac (24-inch, M1, 2021)
23.5-inch Retina 4.5K display, M1 8-Core CPU & 7-Core GPU, 16GB unified
memory, 1TB SSD
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
43W| 80W| 147 BTU/h| 274 BTU/h
iMac (24-inch, M1, 2021)
23.5-inch Retina 4.5K display, M1 8-Core CPU & 8-Core GPU, 16GB unified
memory, 2TB SSD
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
43W| 84W| 147 BTU/h| 286 BTU/h
iMac (Retina 5K, 27-inch, 2020)
27-inch Retina 5K display, 3.6GHz 10-Core i9, 128GB 2666MHz DDR4 SDRAM, 8TB
Solid State Drive, AMD Radeon Pro 5700 XT with 16GB memory
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
74W| 295W| 252 BTU/h| 1007 BTU/h
iMac (Retina 5K, 27-inch, 2019)
27-inch Retina 5K display, 3.6GHz Intel 8-Core i9, 64GB 2666MHz DDR4 SDRAM,
3TB Fusion Drive, AMD Radeon Pro Vega 48 with 8GB memory
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
71W| 262W| 242 BTU/h| 895 BTU/h
iMac (Retina 4K, 21.5-inch, 2019)
21.5-inch Retina 4K display, 3.2GHz Intel 6-Core i7, 32GB 2666MHz DDR4
SDRAM, 1TB Solid State Drive, AMD Radeon Pro Vega 20 with 4GB memory
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
47W| 166W| 161 BTU/h| 568 BTU/h
iMac (Retina 5K, 27-inch, 2017)
27-inch Retina 5K display, 4.2GHz Intel Quad-Core i7, 64GB 2400MHz DDR4
SDRAM, 3TB Fusion Drive, AMD Radeon Pro 580 with 8192MB memory
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
71W| 217W| 242 BTU/h| 741 BTU/h
iMac (Retina 4K, 21.5-inch, 2017)
21.5-inch Retina 4K display, 3.6GHz Intel Quad-Core i7, 32GB 2400MHz DDR4
SDRAM, 512GB Solid State Drive, AMD Radeon Pro 560 with 4096MB memory
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
49W| 161W| 168 BTU/h| 550 BTU/h
iMac (21.5-inch, 2017)
21.5-inch display, 2.3GHz Intel Dual-Core i5, 16GB 2400MHz DDR4 SDRAM,
256GB Solid State Drive
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
33W| 74W| 113 BTU/h| 253 BTU/h
iMac (Retina 5K, 27-inch, Late 2015)
27-inch Retina 5K display, 4.0GHz Intel quad-core Core i7, 32GB 1866MHz
DDR3L SDRAM, 3TB Fusion Drive, AMD Radeon R9 M390 with 2GB memory
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
63W| 240W| 215 BTU/h| 819 BTU/h
iMac (Retina 4K, 21.5-inch, Late
2015)
21.5-inch Retina 4K display, 3.3GHz Intel quad-core Core i7, 16GB 1866MHz
LPDDR3 SDRAM, 2TB Fusion Drive
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
40W| 119W| 136 BTU/h| 406 BTU/h
iMac (21.5-inch, Late 2015)
21.5-inch display, 1.6GHz Intel dual-core Core i5, 16GB 1866MHz LPDDR3
SDRAM, 1TB Fusion Drive
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
33W| 58W| 113 BTU/h| 198 BTU/h
iMac (Retina 5K, 27-inch, Mid 2015)
27-inch display, 3.3GHz Intel Core i5, 32GB 1600MHz DDR3 SDRAM, 3TB Fusion
Drive, AMD Radeon R9 M290
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
70W| 197W| 239 BTU/h| 673 BTU/h
iMac (Retina 5K, 27-inch, Late 2014)
27-inch display, 4GHz Intel Core i7, 32GB 1600MHz DDR3 SDRAM, 3TB Fusion
Drive, AMD Radeon R9 M295X with 4096MB memory
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
70W| 288W| 239 BTU/h| 983 BTU/h
iMac (21.5-inch, Mid 2014)
21.5-inch display, 1.4GHz Intel Core i5, 8GB 1600MHz DDR3 SDRAM, 500GB HDD,
integrated graphics
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
33W| 68W| 113 BTU/h| 232 BTU/h
iMac (21.5-inch, Late 2013)
21.5-inch display, 3.1GHz Intel Core i7, 16GB 1600MHz DDR3 SDRAM, 1TB
Fusion Drive, NVIDIA GeForce GT 755M graphics
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
37W| 136W| 126 BTU/h| 463 BTU/h
iMac (21.5-inch, Late 2013)
21.5-inch display, 2.9GHz Intel Core i5, 8GB 1600MHz DDR3 SDRAM, 1TB Serial
ATA Hard Drive, NVIDIA GeForce GT 750M graphics
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
37W| 94W| 127 BTU/h| 322 BTU/h
iMac (21.5-inch, Late 2013)
21.5-inch display, 2.7GHz Intel Core i5, 8GB 1600MHz DDR3 SDRAM, 1TB Serial
ATA Hard Drive, Intel Iris Pro Graphics
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
38W| 91W| 129 BTU/h| 311 BTU/h
iMac (27-inch, Late 2013)
27-inch display, 3.4GHz Intel Core i7, 32GB 1600MHz DDR3 SDRAM, 3TB Fusion
Drive, NVIDIA GeForce GTX 775M
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
78W| 229W| 266 BTU/h| 782 BTU/h
iMac (27-inch, Late 2013)
27-inch display, 3.4GHz Intel Core i5, 8GB 1600MHz DDR3 SDRAM, 1TB Serial
ATA Hard Drive, NVIDIA GeForce GTX 775M
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
80W| 214W| 274 BTU/h| 729 BTU/h
iMac (27-inch, Late 2013)
27-inch display, 3.2GHz Intel Core i5, 8GB 1600MHz DDR3 SDRAM, 1TB Serial
ATA Hard Drive, NVIDIA GeForce GT 755M
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
78W| 180W| 268 BTU/h| 615 BTU/h
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
80W| 101W| 273 BTU/h| 345 BTU/h
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
81W| 106W| 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
85W| 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, 1TB
Serial ATA hard drive, AMD Radeon HD 6770M graphics
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
135W| 170W| 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
139W| 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
142W| 200W| 485 BTU/h| 682 BTU/h
iMac (21.5-inch, 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
145W| 365W| 495 BTU/h| 1,245 BTU/h
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
104W| 241W| 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
104W| 241W| 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
| 365W| | 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
145W| 365W| *| 1,245 BTU/h
iMac (20-inch, Early 2009)
20-inch display, 2.66GHz Intel Core 2 Duo, 2GB 1066MHz DDR3 SDRAM – 2x1GB,
320GB Serial ATA hard drive, NVIDIA GeForce 9400M graphics
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
60.7W| 108.9W| 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 Serial ATA hard drive, NVIDIA GeForce 9400M graphics
Power Consumption| Thermal Output
Idle| CPU Max| Idle| CPU Max
104.4W| 151.5W| 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
116.4W| 192.2W| 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
113.9W| 208.9W| 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
125.5W| 215.7W| 426.7 BTU/h| 733.4 BTU/h
- Information not available.
Notes
- Power consumption data (watts) is measured from the wall power source and includes all power supply and system losses. Additional correction isn’t 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 require faster fan speeds which increases power consumption. At 35°C (95°F), 50W should be added to reflect increased power consumption.
Published Date: June 21, 2021
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