Apple iMac (20-inch, Mid 2009) vs Apple iMac (24-inch, Early 2008)

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iMac (20-inch, Mid 2009) compared with iMac (24-inch, Early 2008)

	AppleiMac (20-inch, Mid 2009)	AppleiMac (24-inch, Early 2008)
Overview
Released
Released	April 2009	April 2008
Performance
Processor
Processor	Intel Core 2 Duo 2 GHz (iMac Mid 2009) or Intel Core 2 Duo 2.26 GHz (iMac Mid 2009)	Intel Core 2 Duo E8235 or Intel Core 2 Duo E8435
CPU cores
CPU cores	2	2
Graphics
Graphics	NVIDIA GeForce 9400M (256 MB shared DDR3)	ATI Radeon HD 2600 PRO (256 MB GDDR3) or NVIDIA GeForce 8800 GS (512 MB GDDR3)
Memory
Memory	1 GB, 2 GB or 4 GB	2 GB or 4 GB
Storage
Storage	160 GB to 320 GB	320 GB to 1 TB (better)
CPU
CPU	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.	2.8 GHz Intel Core 2 Duo E8235, configurable to 3.06 GHz E8435; 6 MB shared L2 cache and 1066 MHz frontside bus. Exact processor identities cross-checked with EveryMac.
GPU
GPU	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.	Either processor supports ATI Radeon HD 2600 PRO with 256 MB GDDR3 or optional NVIDIA GeForce 8800 GS with 512 MB GDDR3
Memory type
Memory type	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.	Two user-accessible SO-DIMM slots for 800 MHz DDR2 SDRAM; 2 GB standard, configurable to 4 GB
Storage type
Storage type	160 or 320 GB 7200 rpm Serial ATA hard drive; slot-loading 8x SuperDrive with 4x double-layer DVD burning.	320 GB 7200 rpm Serial ATA hard drive with either processor, configurable to 500 GB, 750 GB or 1 TB; slot-loading 8x SuperDrive with 4x double-layer DVD burning
Display
Screen size
Screen size	20″	24″
Resolution
Resolution	1680 × 1050	1920 × 1200 (better)
Brightness
Brightness	290 nits	385 nits (better)
Display type
Display type	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 Panel technology and refresh rate unpublished.	Glossy widescreen TFT active-matrix LCD, millions of colours; typical contrast 750:1 and 178° horizontal and vertical viewing angles. Panel technology and refresh rate unpublished and omitted.
Display features
Display features	–	Optional 24-inch VESA Mount Adapter kit
Connections
Ports
Ports	4 × USB-A, Ethernet, headphone jack	3 × 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	802.11n draft; compatible with 802.11a/b/g
Bluetooth
Bluetooth	–	2.1 + EDR
Camera
Camera	iSight camera	iSight camera
Back ports
Back ports	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.	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.
External displays
External displays	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.	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.
Speakers
Speakers	Built-in stereo speakers and microphone; internal 24 W digital amplifier and support for Apple Stereo Headset microphones.	Built-in stereo speakers with internal 24 W digital amplifier and built-in microphone
Keyboard and mouse
Keyboard and mouse	Apple Keyboard and Mighty Mouse.	Apple Keyboard, Mighty Mouse and infrared Apple Remote; optional wireless keyboard and wireless 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	569 × 207 × 520 mm
Operating system
Operating system	macOS	macOS
Size and weight detail
Size and weight detail	Maker reference weight; actual weight varies with configuration and manufacturing process.	Maker weight 25.4 pounds (11.5 kg), varying by configuration and manufacturing process; shared scalar weight omitted
Power supply
Power supply	Maximum continuous power 200 W; 100–240 V AC, 50–60 Hz.	Maximum continuous power 280 W; 100–240 V AC, 50–60 Hz single phase
Power use
Power use	–	Apple environmental report for MB325 at 230 V records 1.65 W off, 2.58 W sleep and 36.2 W idle with display off or 113.2 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	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.	iMac, Apple Keyboard, Mighty Mouse, Apple Remote, cleaning cloth, power cord, install/restore DVDs and documentation; Mac OS X Leopard and iLife '08