Apple iMac - Core i5 2.5 GHz - 4 GB - 500 GB - LCD 21.5"

  • Processor - 1 x Intel Core i5 2.5 GHz ( Quad-Core )
  • Memory - 4 GB (installed) / 8 GB (max) - DDR3 SDRAM - 1333 MHz - PC3-10600
  • Hard Drive - 1 x 500 GB - standard - Serial ATA-300
  • Optical Drive - DVD±RW (±R DL)
  • Cache Memory - 6 MB L3 Cache
  • Networking - Ethernet, Fast Ethernet, Gigabit Ethernet, IEEE 802.11b, IEEE 802.11a, IEEE 802.11g, IEEE 802.11n, Bluetooth 2.1 EDR
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Product Code:
P100767P
Manufacturer No:
MC309B/A

Description

Compatability Today's iMac has come a long way from the first 15-inch iMac. Take one look and you'll see just how far. A display with edge-to-edge glass covers nearly the entire front of the enclosure. When all you see is the display, nothing gets between you and what's onscreen. Movies, TV shows, FaceTime HD video calls, websites, photos - everything looks stunning on the widescreen 16:9 iMac display.

The more pixels a display has, the more light those pixels need to achieve the best picture possible. And that's exactly what the LED backlighting in iMac does: it pushes light through each pixel with remarkable brightness and efficiency. Because the LED backlight doesn't take up much space, the iMac enclosure stays thin - even with all the high-performance components inside.

The widescreen iMac display allows more room to separate the two hottest components, the CPU and the GPU. This keeps things cool inside the iMac enclosure. Apple engineers also implemented an intelligent control system that monitors temperatures and delivers just the right amount of airflow to critical components. And the three fans inside iMac have been tuned to be ultra quiet, so you hardly know it's on.

Watching a movie, updating your blog, editing photos. Tasks like these require data to travel from place to place. The Intel Core architecture puts the processor, cache, memory controller, and graphics engine on a single chip. Since data doesn't have as far to travel, you get faster performance and greater efficiency.

Thunderbolt technology has arrived - and Apple computers are the first to have it. With one tiny port, you get lightning-fast transfer speeds and huge expansion capabilities. Two 10-Gbps data channels per port mean you can transfer data up to 12 times faster than with FireWire 800. And don't worry about a single drive or peripheral tying up the Thunderbolt port: you can daisy-chain as many as six devices plus a display.

Apple iMac - All-in-one - 1 x Core i5 2.5 GHz - RAM 4 GB - HDD 500 GB - DVD-Writer - Radeon HD 6750M - GigE - WLAN : 802.11 a/b/g/n, Bluetooth 2.1 EDR - OS X 10.8 Mountain Lion - Monitor : LCD 21.5" 1920 x 1080 ( Full HD ) - keyboard: UK

Specifications

Basic Specifications

Manufacturer's Part Number
MC309B/A
EAN
0885909400782
RAM
4 GB (installed) / 8 GB (max) - DDR3 SDRAM - 1333 MHz - PC3-10600
Cache Memory
6 MB L3 Cache
Manufacturer Warranty
1 year warranty
Networking
GigE, 802.11b, 802.11a, 802.11g, 802.11n, Bluetooth 2.1 EDR
Storage Controller
SATA ( SATA 3Gb/s )
Cache Per Processor
6 MB
Audio Output
Integrated - stereo
Hard Drive
1 x 500 GB - SATA 3Gb/s
Form Factor
All-in-one
Product Description
Apple iMac - Core i5 2.5 GHz - 4 GB - 500 GB - LCD 21.5"
Processor Main Features
Intel Turbo Boost Technology 2
Dimensions (WxDxH)
52.8 cm x 18.9 cm x 45.1 cm
Monitor
21.5" - LCD - 1920 x 1080 ( Full HD )
Weight
9.3 kg
Localisation
English / United Kingdom
Optical Storage
DVD±RW (±R DL)
Type
Personal computer
Power
AC 120/230 V ( 50/60 Hz )
OS Provided
Apple OS X 10.8 Mountain Lion
Graphics Controller
AMD Radeon HD 6750M
Processor
1 x Intel Core i5 2.5 GHz ( Quad-Core )
Environmental Standards
ENERGY STAR Qualified , EPEAT Gold
Video Memory
512 MB GDDR5 SDRAM
Card Reader
Yes
Camera
Integrated

General

Type
Personal computer
Product Form Factor
All-in-one
Built-in Devices
Stereo speakers, antenna, infrared receiver
Localisation
English / United Kingdom

Input Device

Type
Mouse, keyboard

Keyboard

Keyboard Name
Apple Wireless Keyboard
Connectivity
Wireless
Interface
Bluetooth
Localization & Layout
UK

RAM

Installed Size
4 GB / 8 GB (max)
Technology
DDR3 SDRAM
Memory Speed
1333 MHz
Memory Specification Compliance
PC3-10600
Form Factor
SO DIMM 204-pin
Configuration Features
2 x 2 GB

Environmental Parameters

Min Operating Temperature
10 °C
Max Operating Temperature
35 °C
Humidity Range Operating
5 - 95% (non-condensing)
Sound Emission
18 dBA

Networking

Type
Integrated
Wireless LAN Supported
Yes
Data Link Protocol
Ethernet, Fast Ethernet, Gigabit Ethernet, IEEE 802.11b, IEEE 802.11a, IEEE 802.11g, IEEE 802.11n, Bluetooth 2.1 EDR
Compliant Standards
IEEE 802.11b, IEEE 802.11a, IEEE 802.11g, IEEE 802.11n, Bluetooth 2.1

Cache Memory

Installed Size
L3 Cache - 6 MB
Cache Per Processor
6 MB

Optical Storage

Type
DVD±RW (±R DL)
Read Speed
24x (CD) / 8x (DVD)
Write Speed
24x (CD) / 8x (DVD±R) / 4x (DVD±R DL)
CD / DVD Rewrite Speed
16x (CD) / 6x (DVD-RW) / 8x (DVD+RW)

Expansion / Connectivity

Slots
4 (total) / 2 (free) x SO DIMM 204-pin
Interfaces
1 x Thunderbolt ¦ 1 x FireWire 800 ¦ 4 x USB 2.0 ¦ 1 x audio - SPDIF output/headphones ¦ 1 x audio - SPDIF input/line-in ¦ 1 x LAN (Gigabit Ethernet) ¦ 1 x IrDA

Graphics Controller

Graphics Processor
AMD Radeon HD 6750M
Video Memory
512 MB GDDR5 SDRAM

Storage Controller

Type
1 x SATA - integrated
Controller Interface Type
SATA 3Gb/s

Audio Input

Type
Microphone

Monitor

Monitor Type
LCD
Diagonal Size
21.5"
Native Resolution
1920 x 1080 ( Full HD )
Widescreen Display
Yes

Processor

Type
Intel Core i5 2.5 GHz
Number of Cores
Quad-Core
64-bit Computing
Yes
Installed Qty
1
Max Supported Qty
1
Processor Main Features
Intel Turbo Boost Technology 2

Operating System / Software

OS Provided
Apple OS X 10.8 Mountain Lion
Software
Apple QuickTime, Apple iTunes, Apple Mac OS X Mail, Apple iChat, Apple iCal, Apple DVD Player, Apple iLife, Apple Address Book, Apple Safari, Apple Dashboard, Apple Spotlight, Apple XCode Developer Tools, Front Row, Photo Booth, Apple Spaces, Apple Quick Look, Apple Time Machine

Audio Output

Type
Integrated
Sound Output Mode
Stereo
Speakers
2 x right / left channel

Manufacturer Warranty

Service & Support
1 year warranty
Service & Support Details
Limited warranty - 1 year ¦ Technical support - phone consulting - 90 days

Power

Device Type
Power supply
Nominal Voltage
AC 120/230 V ( 50/60 Hz )

Storage

Hard Drive
1 x 500 GB - standard - Serial ATA-300 - 7200 rpm

Mouse

Connectivity
Wireless
Technology
Laser
Interface
Bluetooth
Features
Multi-Touch

Environmental Standards

EPEAT Compliant
EPEAT Gold
ENERGY STAR Qualified
Yes

Card Reader

Type
Card reader
Supported Flash Memory Cards
SD Memory Card, SDHC Memory Card, SDXC Memory Card

Camera

Form Factor
Integrated

Hard Drive

Type
HDD
Capacity
1 x 500 GB
Interface Type
SATA 3Gb/s
Spindle Speed
7200 rpm

Processor / Chipset

CPU
Intel Core i5 2.5 GHz
Number of Cores
Quad-Core
64-bit Computing
Yes
CPU Qty
1
Max CPU Qty
1
Processor Main Features
Intel Turbo Boost Technology 2

Dimensions & Weight

Width
52.8 cm
Depth
18.9 cm
Height
45.1 cm
Weight
9.3 kg

Jargon

64 Bit Computing

The previous generation of processors were 32 bit, meaning that they could address a maximum of 4 gigabytes of memory and could handle whole numbers with values of up to about 2 billion. The new generation of 64 bit computers, by doubling the number of bits, can now theoretically address up to 256 terabytes of memory and can handle whole numbers with values up to about 9,000,000,000,000,000,000. This allows 64 bit systems to process huge amounts of data, for example massive databases or extremely high resolution computer graphics.

Cache

Cache memory is a special type of high performance memory used by processors to speed up processing by avoiding access to slower main memory. Cache memory is built into the processor itself and operates at the same speed as the rest of the processor, as opposed to main memory which has to be several times slower.

Having a bigger cache will in most cases result in faster performance. Currently, processor cache sizes up to 8 megabytes are available.

Hard Drive

Hard drives are data storage devices built into every computer. You can think of them as being like the computer's filing cabinet, a place where files can be kept for later retrieval. Any program you install on a computer and any file you create will be stored on the hard drive. The drive contains a metal disc with a magnetic coating, spinning at high speed. Data is stored on the disc in a similar manner to how sound and video is recorded onto video tape. Because hard drives are used to store all the data a computer works with they are considered to be a vital part of the system.

The amount of space that a hard drive can use to store files is measured in gigabytes (billions of bytes). One gigabyte (1 GB) is about the same amount of storage as one and a half recordable CDs. A typical music file such as one downloaded from iTunes or Amazon is about 5 megabytes, and there are a thousand megabytes in a gigabyte, so 1 GB is enough for around 200 music files.

As hard drives store everything you work with on your computer, the size of your hard drive is of critical importance - you can never have too much hard drive space. A 20 GB drive, considered a good size only a few years ago, is now thought to be too small to be of much use. Even the cheapest computers currently come with at least an 80 GB drive. For desktops, hard drive size can typically range from 160 GB to 250 GB, though larger sizes are available.

Solid State Drive

Recently a new storage technology has appeared, called Solid State Drives, or SSD for short. Instead of a spinning magnetic disc, these drives use Flash memory chips to store data. Flash memory doesn't lose its contents when it is powered off, making it suitable for storing files. SSDs have several key advantages over mechanical hard drives; they have no moving parts to damage or wear out, making them more likely to survive being dropped. They also use less power, generate less heat and are usually faster than mechanical drives, and are silent in operation. However, they are more expensive than mechanical hard drives, and don't offer as much storage space. The biggest SSDs top out at 128-256 GB, compared to up to 1500 GB for mechanical drives.

Memory

Memory is the main working space your computer uses to load running programs and files that you are working on. Computer memory is volatile, meaning that once you turn the computer's power off, you will lose anything that is stored in memory. This is why computers also have hard drives to provide a place for you to keep files when you are not working on them.

The amount of memory a system has is measured in megabytes and gigabytes, like hard drive space. However, due to technical reasons, a gigabyte of computer memory is about 7% more than a gigabyte of hard drive space.

The amount of memory you have will affect how well your computer will run. If a computer doesn't have enough real memory to load a program or open a file it will allocate space on the hard drive to act as "virtual memory" and move parts of memory that aren't being used very often off onto it in order to free space for whatever you want to do. However, if you then decide to switch back to something that was moved to virtual memory, the computer will have to copy it back into main memory from the hard drive. This "paging out" and "paging in" process can slow a computer down noticeably, and the less real memory you have, the more reliant on virtual memory your computer will be and the slower it will run.

Modern computer software is heavily reliant on memory, for example the minimum memory required for Windows Vista is 512 megabytes (half a gigabyte). This won't leave much real memory available though, and your computer will be heavily reliant on virtual memory. You can avoid this problem by installing more memory, at least a gigabyte is recommended for Vista

Multi Core

Traditionally, processors for PCs have been single core, meaning that the processor package contained a chip with a single processing device, known as a core, built into it. As technology has improved, chip manufacturers have found ways of squeezing ever more processing elements onto a single silicon chip. This has led to the idea of multi core processors, where the processor chip contains 2 or more complete processors. With properly written software, a dual core processor can perform nearly twice as much work as a single core processor running at the same speed. Systems with at least 2 processor cores are becoming commonplace.

Networking

Almost all computers will support networking in one form or another. This can include wired ethernet, wireless networking or both. Accessing the internet will require networking.

Wireless networking equipment (also often referred to as wi-fi) will support some version of the 802.11 standard, either the mainstream 802.11g or a draft version of the new 802.11n standard (sometimes called n draft). You may also find 802.11a systems, which offer similar performance to 802.11g, but these are rather uncommon. Systems based on 802.11b are generally considered to be obsolete. All versions of 802.11 require you to be within range of a wireless hotspot or router for internet access.

Optical Drives

An optical drive is a device that allows you to access or create CDs, DVDs, and/or Blu-Ray discs, depending on the capabilities of the drive. Nearly all drives can read CDs, and most can write ("burn") them. Drives that can read and write DVDs are also common. Most computers come equipped with at least one optical drive, and usually have enough space to install 2 or more.

Newer high-end computers may come with a drive capable of reading Blu-Ray discs, the latest format for high definition movies.

Ports and Connectors

Computers will have at least one video connector of some sort on the back panel to allow them to connect to monitors, projectors, or other display devices. Most machines will have a VGA port (commonly coloured blue) or a more modern DVI port (commonly coloured white). Some machines will have more than one video port, allowing them to drive several displays at once.

Systems with sound will usually have a headphone jack on the front panel for listening in private, and will often also incorporate a microphone jack as well. The back panel will include several jacks for connecting up to surround sound speakers and other audio devices. Some may also include S/PDIF connectors for connecting to high end audio equipment. Some computers will have an internal speaker but this is less common than it used to be.

Most computers will incorporate at least 4 USB ports, as there is a very wide range of accessories that can connect via USB, such as external hard drives, Flash memory sticks, keyboards, mice and many other types of devices. As USB devices are so common, many computers will include more than 4 ports, 6 to 8 ports being common. Most computers include 2 USB ports on the front panel for easy access.

Some computers have an IEEE 1394 port, also known as a FireWire port, or for systems made by Sony an iLink connector. This can be used to connect to external hard drives, several models of video cameras and other computers via their FireWire link.

While PS/2 ports, used for connecting keyboards and mice, are considered to be legacy connectors, they are still very common, as they leave precious USB ports that would otherwise be tied up with a keyboard and mouse free for other devices. These ports are colour coded, purple for keyboards and green for mice.

There are other ports that are also common on the back panels of PCs. An ethernet port, similar in appearance to a telephone jack, is common on machines with Ethernet networking. E-SATA ports are a new type of connector designed for external hard drives. They are still new, but are becoming more common. You might find legacy serial, Centronics or SCSI connectors on the back panel as well, but these are now quite rare as their functions are now provided by newer standards, mostly USB.

Processor

The processor is a computer's "brain", responsible for all the operations the computer can perform. The performance of the processor will have a significant impact on the performance of the computer as a whole.

Celeron

Celeron is the branding Intel uses for a range of lower cost processors for use in value computers.

Core 2

Core 2 is the branding Intel applies to its current range of processors. The range includes Core 2 Duo for mainstream systems, Core 2 Quad for higher performance computers and Core 2 Extreme for workstations. The Core 2 Duo processors consist of 2 separate processors in a single package and the Quad and Extreme versions include 4 processors.

Core i7

Core i7 is Intel's latest range of processors, the successor to the current range of Core 2 processors. All the current members of the Core i7 family are quad core, meaning that they effectively contain four separate processors in a single package. Core i7 is expected to offer better performance than the current Core 2 family.

Pentium

Pentium is the branding Intel uses for a range of lower cost processors for use in value computers. This name had previously been used for Intel's mainstream and high performance processors, but these roles have now been taken by the Core 2 and Core i7 range

Opteron

AMD's Opteron is a family of processors intended for high end workstations and servers, it is a direct competitor to Intel's Xeon range. They offer features not available on the consumer Semperon and Phenom family, such as support for Fully Buffered memory, multiprocessing support (allowing more than one processor to be installed on the same motherboard) and very large caches. While Opteron is intended for use in the server market, some very high end desktop PCs and workstations use the Opteron as their main processor.

Phenom

Phenom is AMD's line of processors for mainstream and higher end desktop computers. They are intended to compete with Intel's Core 2 and Core i7 processors. All Phenom process come with at least 3 processing cores (effectively 3 complete processors in a single package), and high end versions have four.

Semperon

Semperon is the brand name AMD uses for a series of low cost processors intended for use in value products. Semperon processors can be found in many low cost computers and are in direct competition with Intel's Celeron range.

Xeon

The highest performance server-grade processors from Intel are sold under the Xeon brand. They offer features not available on the consumer Core family, such as support for Fully Buffered memory, multiprocessing support (allowing more than one processor to be installed on the same motherboard) and very large caches. While Xeon is intended for use in the server market, some very high end desktop PCs and workstations use the Xeon as their main processor. For example, the Mac Pro can be purchased with a pair of 4 core Xeon processors, for 8 cores total.

Storage Controller

The storage controller is the device that allows the computer to communicate wit hits attached hard drives. IDE and SATA are the common standards for storage controllers.

Video controller

The video controller is a part of your computer that generates the image that will be displayed on the computer's screen. For desktops you can buy a system that uses integrated graphics built onto the motherboard, or with a more capable dedicated video controller card.

Most discrete video controllers are made by nVidia or ATI/AMD, whereas integrated controllers are typically made by Intel. If you need high performance for tasks like video editing, or want to play games on your computer, then a discrete graphics solution would be a better choice. For general computing tasks such as email, web browsing, word processing, etc, integrated graphics are more than adequate.

Unlike laptops, desktop computers are easily upgradable. If you find that your integrated graphics aren't meeting your needs, you can purchase and install an add-in video controller card with a more powerful graphics processor at a later date. You don't have this option with laptops.

Integrated graphics

An Integrated Graphics Controller is a video controller that is built into the computer's chipset itself and which uses a portion of the computer's main memory as a frame buffer. Integrated graphics are common on value computers, as they have the advantage of costing less, generating less heat and using less power than discrete video controllers, resulting in quieter running. They can't match the performance of a dedicated solution though, and the portion of the main memory they use as a frame buffer cannot be used for general tasks by the computer, reducing the amount of memory available to the system.

Discrete graphics controller

A discrete graphics controller is an add-in card installed in your computer, whose sole responsibility is managing the display. They also have special dedicated video memory that is separate from the main memory of the rest of the computer. Discrete graphics controllers are more common in gaming computers and workstations, as they offer superior performance compared to integrated graphics and don't take memory away from the rest of the system. The performance comes at a price though, as they are more expensive than integrated controllers and produce more heat, meaning more fan noise.

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