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Computer

From Wikipedia, the free encyclopedia

For other uses, see Computer (disambiguation).

"Computer technology" redirects here. For the company, see Computer Technology Limited.

A computer is a programmable machine designed to sequentially and automatically carry out a sequence 

of arithmetic or logical operations. The particular sequence of operations can be changed readily, 

allowing the computer to solve more than one kind of problem. An important class of computer operations on some 

computing platforms is the accepting of input from human operators and the output of results formatted for human 

consumption. 

The interface between the computer and the human operator is known as the user interface.

Conventionally a computer consists of some form of memory, at least one element that carries out arithmetic

 and logic operations, and a sequencing and control unit that can change the order of operations based on the

 information that is stored. Peripheral devices allow information to be entered from an external source,

 and allow the results of operations to be sent out.

A computer's processing unit executes series of instructions that make it read, manipulate and then store data. 

Conditional instructions change the sequence of instructions as a function of the current state of the machine or its environment.

The first electronic digital computers were developed in the mid-20th century (1940–1945). 

Originally, they were the size of a large room, consuming as much power as several hundred modern personal computers (PCs).^[1] 

In this era mechanical analog computers were used for military applications.

Modern computers based on integrated circuits are millions to billions of times more capable than the early machines,

 and occupy a fraction of the space.^[2] Simple computers are small enough to fit into mobile devices, and mobile computerscan

 be powered by small batteries. Personal computers in their various forms are icons of the Information Age and are what most 

people think of as "computers". However, the embedded computers found in many devices from mp3 players tofighter aircraft 

and from toys to industrial robots are the most numerous

Intel® Core™ i5-2540M Processor
(3M Cache, 2.60 GHz

Status	Launched
Launch Date	Q1'11
Processor Number	i5-2540M
# of Cores	2
# of Threads	4
Clock Speed	2.6 GHz
Max Turbo Frequency	3.3 GHz
Intel® Smart Cache	3 MB
Bus/Core Ratio	26
DMI	5 GT/s
Instruction Set	64-bit
Instruction Set Extensions	AVX
Embedded Options Available	No
Lithography	32 nm
Max TDP	35 W
Recommended Customer Price	$266 - $269

Memory Specifications
Max Memory Size (dependent on memory type)	16 GB
Memory Types	DDR3-1066/1333
# of Memory Channels	2
Max Memory Bandwidth	21.3 GB/s
ECC Memory Supported	No

Graphics Specifications
Processor Graphics	Intel® HD Graphics 3000
Graphics Base Frequency	650 MHz
Graphics Max Dynamic Frequency	1.3 GHz
Graphics Output	eDP/DP/HDMI/SDVO/CRT
Intel® Quick Sync Video	Yes
Intel® InTru™ 3D Technology	Yes
Intel® Wireless Display	Yes
Intel® Flexible Display Interface (Intel® FDI)	Yes
Intel® Clear Video HD Technology	Yes
Dual Display Capable	Yes
Macrovision* License Required	No

Expansion Options
PCI Express Revision	2.0
PCI Express Configurations	1x16, 2x8, 1x8+2x4
# of PCI Express Ports	1

Package Specifications
Max CPU Configuration	1
TJUNCTION	100 C
Package Size	37.5mm x 37,5mm (rPGA988B); 31mm x 24mm (BGA1023)
Graphics and IMC Lithography	32 nm
Sockets Supported	FCBGA1023, PPGA988
Low Halogen Options Available	Yes

Advanced Technologies
Intel® Turbo Boost Technology	2.0
Intel® vPro Technology	Yes
Intel® Hyper-Threading Technology	Yes
Intel® Virtualization Technology (VT-x)	Yes
Intel® Virtualization Technology for Directed I/O (VT-d)	Yes
Intel® Trusted Execution Technology	Yes
AES New Instructions	Yes
Intel® 64	Yes
Intel® Anti-Theft Technology	Yes
Intel® My WiFi Technology	Yes
4G WiMAX Wireless Technology	Yes
Idle States	Yes
Enhanced Intel SpeedStep® Technology	Yes
Intel® Demand Based Switching	No
Thermal Monitoring Technologies	Yes
Intel® Fast Memory Access	Yes
Intel® Flex Memory Access	Yes
Execute Disable Bit	Yes