Apple iMac (20-inch, Early 2008) vs Apple iMac (20-inch, Mid 2009)

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iMac (20-inch, Early 2008) compared with iMac (20-inch, Mid 2009)

	AppleiMac (20-inch, Early 2008)	AppleiMac (20-inch, Mid 2009)
Overview
Released
Released	April 2008	April 2009
Performance
Processor
Processor	Intel Core 2 Duo E8135 or Intel Core 2 Duo E8335	Intel Core 2 Duo 2 GHz (iMac Mid 2009) or Intel Core 2 Duo 2.26 GHz (iMac Mid 2009)
CPU cores
CPU cores	2	2
Graphics
Graphics	ATI Radeon HD 2400 XT (128 MB GDDR3) or ATI Radeon HD 2600 PRO (256 MB GDDR3)	NVIDIA GeForce 9400M (256 MB shared DDR3)
Memory
Memory	1 GB, 2 GB or 4 GB	1 GB, 2 GB or 4 GB
Storage
Storage	250 GB to 750 GB (better)	160 GB to 320 GB
CPU
CPU	2.4 GHz Intel Core 2 Duo E8135 or 2.66 GHz E8335; 6 MB shared L2 cache and 1066 MHz frontside bus. Exact processor identities cross-checked with EveryMac.	2.0 or 2.26 GHz Core 2 Duo with 3 MB shared L2 cache and 1066 MHz frontside bus. The retained configuration table says 2.6 GHz, but its processor description and Apple's July 2011 education price list confirm 2.26 GHz; exact Intel SKU not established.
GPU
GPU	ATI Radeon HD 2400 XT with 128 MB GDDR3 on the 2.4 GHz model; Radeon HD 2600 PRO with 256 MB GDDR3 on the 2.66 GHz model	NVIDIA GeForce 9400M with 256 MB shared DDR3 according to the retained maker specification; contemporary EveryMac coverage describes 128 MB at launch, so the retained maker value is used.
Memory type
Memory type	Two user-accessible SO-DIMM slots for 800 MHz DDR2 SDRAM; 1 GB standard on the 2.4 GHz model, configurable to 2 or 4 GB; 2 GB standard on the 2.66 GHz model, configurable to 4 GB	Two SO-DIMM slots for 1066 MHz DDR3; configurations A/B have 1 GB standard and C has 2 GB. Factory options are 2 or 4 GB; the retained specification supports up to 8 GB, which is not listed as a factory configuration.
Storage type
Storage type	7200 rpm Serial ATA hard drive; 250 GB on the 2.4 GHz model, configurable to 320 or 500 GB; 320 GB on the 2.66 GHz model, configurable to 500 or 750 GB. Slot-loading 8x SuperDrive with 4x double-layer DVD burning.	160 or 320 GB 7200 rpm Serial ATA hard drive; slot-loading 8x SuperDrive with 4x double-layer DVD burning.
Display
Screen size
Screen size	20″	20″
Resolution
Resolution	1680 × 1050	1680 × 1050
Brightness
Brightness	290 nits	290 nits
Display type
Display type	Glossy widescreen TFT active-matrix LCD, millions of colours; typical contrast 800:1 and 160° horizontal and vertical viewing angles. Panel technology and refresh rate unpublished and omitted.	Glossy TFT active-matrix LCD with millions of colours; typical contrast 800:1 and 160-degree horizontal and vertical viewing angles. Panel technology and refresh rate unpublished.
Connections
Ports
Ports	3 × USB-A, Ethernet, headphone jack	4 × USB-A, Ethernet, headphone jack
Ethernet
Ethernet	1 Gb/s	1 Gb/s
External displays
External displays	Up to 1	Up to 1
Wi-Fi
Wi-Fi	802.11n draft; compatible with 802.11a/b/g	802.11n draft
Bluetooth
Bluetooth	2.1 + EDR	–
Camera
Camera	iSight camera	iSight camera
Back ports
Back ports	Three USB 2.0 ports on the computer, plus two on the supplied keyboard; one FireWire 400 and one FireWire 800 port, each rated 7 W; mini-DVI output, Gigabit Ethernet, headphone/optical digital output and line-in/optical digital input. FireWire, mini-DVI and audio input described here.	Four USB 2.0 ports on the computer, plus two on the keyboard; FireWire 800 at 7 W, Mini DisplayPort, Gigabit Ethernet, headphone/optical digital output and line-in/optical digital input. Bluetooth is not published in this exact model specification.
External displays
External displays	One external display in extended desktop or mirroring mode; digital resolutions up to 1920 × 1200 and analogue up to 2048 × 1536. DVI, VGA, S-video and composite adapters sold separately.	Built-in display and one external display up to 2560 × 1600 simultaneously; extended desktop or mirroring, with optional DVI, VGA or dual-link DVI adapters.
Speakers
Speakers	Built-in stereo speakers with internal 24 W digital amplifier and built-in microphone	Built-in stereo speakers and microphone; internal 24 W digital amplifier and support for Apple Stereo Headset microphones.
Keyboard and mouse
Keyboard and mouse	Apple Keyboard, Mighty Mouse and infrared Apple Remote; optional wireless keyboard and wireless Mighty Mouse	Apple Keyboard and Mighty Mouse.
Design and power
Type
Type	All-in-one	All-in-one
Weight
Weight	–	9.1 kg
Width × depth × height
Width × depth × height	485 × 189 × 469 mm	485 × 189 × 469 mm
Operating system
Operating system	macOS	macOS
Size and weight detail
Size and weight detail	Maker weight 20 pounds (9.1 kg), varying by configuration and manufacturing process; shared scalar weight omitted	Maker reference weight; actual weight varies with configuration and manufacturing process.
Power supply
Power supply	Maximum continuous power 200 W; 100–240 V AC, 50–60 Hz single phase	Maximum continuous power 200 W; 100–240 V AC, 50–60 Hz.
Power use
Power use	Apple environmental report at 230 V records 1.22 W off, 2.20 W sleep and 33.2 W idle with display off or 66.8 W with display on; display on means full brightness	–
Materials
Materials	Recyclable aluminium and glass enclosure; arsenic-free display glass, majority of circuit-board laminates free of brominated flame retardants and PVC-free internal cables	–
In the box
In the box	iMac, Apple Keyboard, Mighty Mouse, Apple Remote, cleaning cloth, power cord, install/restore DVDs and documentation; Mac OS X Leopard and iLife '08	Education institution model. Contemporary EveryMac coverage records April 2009 release; a maker-confirmed first delivery day is unavailable. Launch configuration A includes Leopard and iLife ’09; later B/C specifications list Snow Leopard and iLife ’11, with their introduction dates unestablished.