19inch Fresh LCD @ Rs.4000
17inch Fresh LCD @ Rs.3600
Showing posts with label Computer Accessories. Show all posts
Showing posts with label Computer Accessories. Show all posts
Saturday, 17 November 2012
Thursday, 15 November 2012
Computer's Power Supply
POWER SUPPLY | PRICE |
24500 | |
6500 | |
6300 | |
8100 | |
10500 | |
13800 | |
11800 | |
13000 | |
15500 | |
18000 | |
18500 | |
21800 | |
28500 | |
30000 | |
8600 | |
10500 | |
12600 | |
19000 | |
24000 | |
30000 |
Monday, 12 November 2012
Sata Harddisk Drive Rates
Sata harddisk drive rates may increase a bit
40.GB @ Rs.850-900
80.GB @ Rs.1600-1700
160.GB @ Rs.2500-2600
* price may vary due to company difference.
Saturday, 10 November 2012
Friday, 9 November 2012
Computer UPS
| UPS | PRICE |
| DELL UPS DU 500WATT (750VA) | 26000 |
| DELL UPS DU 1000WATT (1500VA) | 37500 |
| DELL UPS DU 1920WATT (2200VA) | 63800 |
| XPERT SMART CHOICE 650VA (E-65) | 6100 |
| XPERT SMART CHOICE 800VA (E-80) | 6600 |
| XPERT SMART CHOICE 1000VA (E-10) | 8500 |
Wednesday, 7 November 2012
Internet Cable wire (Cat5 / Cat6)
Cat5 starting from Rs.10 to Rs.20
Cat6 starting from Rs.15 to Rs.40
Sunday, 4 November 2012
Graphics Card > 1.GB ATI Radeon PCI-Express Graphics Card @ Rs.4000
Graphics Card > 1.GB ATI Radeon PCI-Express Graphics Card @ Rs.4000
Wednesday, 31 October 2012
Ivy Bridge Processors
Intel’s latest computer processors have recently been released in Pakistan. They are called Ivy Bridge CPUs and are the successors to the Sandy Bridge line of Central Processing Units.Ivy Bridge CPUs are a die shrink of the Sandy Bridge line of CPUs. This means that a newer manufacturing process was used to make Ivy Bridge CPUs. This manufacturing process allows for smaller transistors thereby reducing cost of production and power consumption of the CPUs.
- Ivy Bridge CPUs perform between 5% and 15% faster than Sandy Bridge CPUs running at the same clock speed.
- Ivy Bridge CPUs have a faster Integrated Graphics Processor (IGP) compared to Sandy Bridge CPUs. The IGP is around 25% faster.
- The new CPUs are compatible with existing H61/67 P67 and Z68 chipset motherboards. However, a BIOS upgrade is required for the new CPUs to work.
- A new line of chipsets has also been introduced for Ivy Bridge CPUs. These are the 7 series chipsets like the H77/Z77. These chipsets support PCI-E 3.0 and USB 3.0.
- Ivy Bridge CPUs carry the same Core i3/i5/i7 monikers as previous generation Sandy Bridge CPUs. The only difference is that the model numbers begin with a ’3′ instead of a ’2′. So for example the Core i5 3450 is an Ivy Bridge CPU.
- Only quad core CPUs have been released so far. Dual core i3 CPUs are due to be released in the last quarter of this year.
Information Technology
Information technology
From Wikipedia, the free encyclopedia
Information technology (IT) is concerned with the development, management, and use of computer-based information systems.
Humans have been storing, retrieving, manipulating and communicating information since the Sumerians in Mesopotamia developed writing in about 3000 BC,[1] but the term "information technology" in its modern sense first appeared in a 1958 article published in the Harvard Business Review; authors Leavitt and Whisler commented that "the new technology does not yet have a single established name. We shall call it information technology (IT)."[2] Based on the storage and processing technology employed, it is possible to distinguish four distinct phases of IT development: pre-mechanical (3000 BC – 1450 AD), mechanical (1450–1840), electromechanical (1840–1940) and electronic.[1] This article focuses on the latter of those periods, which began in about 1940.
Definition
The Information Technology Association of America has defined information technology (IT) as "the study, design, development, application, implementation, support or management of computer-based information systems",[3] but the term has also been applied more narrowly to describe a branch of engineering dealing with the use of computers and telecommunications equipment to store, retrieve, transmit and manipulate data.[4] Although commonly used to refer to computers and computer networks, IT encompasses other information-distribution technologies such as television and telephones,[5] a wider field more explicitly known as information and communications technology.History of computers
Main article: History of computing hardware
Devices have been used to aid computation for thousands of years, probably initially in the form of a tally stick.[6] The Antikythera mechanism, dating from about the beginning of the first century BC, is generally considered to be the earliest known mechanical analog computer; it is also the earliest known geared mechanism.[7] Comparable geared devices did not emerge in Europe until the 16th century,[8] and it was not until 1645 that the first mechanical calculator capable of performing the four basic arithmetical operations was developed.[9]Electronic computers, using either relays or valves, began to appear in the early 1940s. The electromechanical Zuse Z3, completed in 1941, was the world's first programmable computer, and by modern standards one of the first machines that could be considered a complete computing machine. Colossus, developed during the Second World War to decrypt German messages was the first electronic digital computer, but although programmable it was not general-purpose, being designed for a single task. Neither did it store its programs in memory; programming was carried out using plugs and switches to alter the internal wiring.[10] The first recognisably modern electronic digital stored-program computer was the Manchester Small-Scale Experimental Machine (SSEM), which ran its first program on 21 June 1948.[11]
Data storage
Main article: Data storage device
Early electronic computers such as Colossus made use of punched tape, a long strip of paper on which data was represented by a series of holes, a technology now obsolete.[12] Electronic data storage as used in modern computers dates from the Second World War, when a form of delay line memory was developed to remove the clutter from radar signals, the first practical application of which was the mercury delay line.[13] The first random-access digital storage device was the Williams tube, based on a standard cathode ray tube,[14] but the information stored in it and delay line memory was volatile in that it had to be continuously refreshed, and thus was lost once power was removed. The earliest form of non-volatile computer storage was the magnetic drum, invented in 1932[15] and used in the Ferranti Mark 1, the world's first commercially available general-purpose electronic computer.[16]Most digital data today is still stored magnetically on devices such as hard disk drives, or optically on media such as CD-ROMs.[17] It has been estimated that the worldwide capacity to store information on electronic devices grew from less than 3 exabytes in 1986 to 295 exabytes in 2007,[18] doubling roughly every 3 years.[19]
Databases
Main article: Database management system
Database management systems emerged in the 1960s to address the problem of storing and retrieving large amounts of data accurately and quickly. One of the earliest such systems was IBM's Information Management System (IMS),[20] which is still widely deployed more than 40 years later.[21] IMS stores data hierarchically,[20] but in the 1970s Ted Codd proposed an alternative relational storage model based on set theory and predicate logic and the familiar concepts of tables, rows and columns. The first commercially available relational database management system (RDBMS) was available from Oracle in 1980.[22]All database management systems consist of a number of components that together allow the data they store to be accessed simultaneously by many users while maintaining its integrity. A characteristic of all databases is that the structure of the data they contain is defined and stored separately from the data itself, in a database schema.[20]
The extensible markup language (XML) has become a popular format for data representation in recent years. Although XML data can be stored in normal file systems, it is commonly held in relational databases to take advantage of their "robust implementation verified by years of both theoretical and practical effort".[23] As an evolution of the Standard Generalized Markup Language (SGML), XML's text-based structure offers the advantage of being both machine and human-readable.[24]
Data retrieval
The relational database model introduced a programming language independent Structured Query Language (SQL), based on relational algebra.[22]The terms "data" and "information" are not synonymous. Anything stored is data, but it only becomes information when it is organised and presented meaningfully.[25] Most of the world's digital data is unstructured, and stored in a variety of different physical formats[26][a] even within a single organisation. Data warehouses began to be developed in the 1980s to integrate these disparate stores. They typically contain data extracted from various sources, including external sources such as the Internet, organised in such a way as to facilitate decision support systems (DSS).[27]
Data transmission
Data transmission has three aspects: transmission, propagation, and reception.[28]XML has been increasingly employed as a means of data interchange since the early 2000s,[29] particularly for machine-oriented interactions such as those involved in web-oriented protocols such as SOAP,[24] describing "data-in-transit rather than ... data-at-rest".[29]
Data manipulation
Hilbert and Lopez[18] identify the exponential pace of technological change (a kind of Moore's law): machines' application-specific capacity to compute information per capita roughly doubled every 14 months between 1986 and 2007; the per capita capacity of the world's general-purpose computers doubled every 18 months during the same two decades; the global telecommunication capacity per capita doubled every 34 months; the world's storage capacity per capita required roughly 40 months to double (every 3 years); and per capita broadcast information has doubled every 12.3 years.[18]Massive amounts of data are stored worldwide every day, but unless it can be analysed and presented effectively it essentially resides in what have been called data tombs: "data archives that are seldom visited".[30] To address that issue, the field of data mining – "the process of discovering interesting patterns and knowledge from large amounts of data"[31] – emerged in the late 1980s.[32]
Commercial perspective
| Category | 2011 spending | 2012 spending |
|---|---|---|
| Computing hardware | 404 | 423 |
| Enterprise software | 269 | 290 |
| IT services | 845 | 864 |
| Telecom equipment | 340 | 377 |
| Telecom services | 1,663 | 1,686 |
| Total | 3,523 | 3,640 |
Social and ethical perspectives
Main article: Information ethics
The field of information ethics was established by mathematician Norbert Wiener in the 1940s.[34] Some of the ethical issues associated with the use of information technology include:[35]- Breaches of copyright by those downloading files stored without the permission of the copyright holders
- Employers monitoring their employees' emails and other Internet usage
- Unsolicited emails
- Hackers accessing online databases
- Web sites installing cookies or spyware to monitor a user's online activities
Computer Hardware Basics
May 7th, 2012
This site ranks very high in the search engines for searches related to computer hardware. So it makes sense that I cover basic topics related to computer hardware.
To that end I added a bunch of pages to this site that cover the basics of computer hardware. Topics covered include “What is computer hardware?“, “CPU“, “Motherboard“, “Power Supply Unit” etc. I will keep adding more pages as time permits.
To that end I added a bunch of pages to this site that cover the basics of computer hardware. Topics covered include “What is computer hardware?“, “CPU“, “Motherboard“, “Power Supply Unit” etc. I will keep adding more pages as time permits.
SATA 2 vs. SATA 3
SATA 2 vs. SATA 3
Serial ATA or SATA has become the standard interface between storage devices and computer motherboards. SATA continues to be updated to faster standards such as SATA 3.SATA 3 offers transfer speeds of up to 6Gbit/s compared to the 3Gbit/s offered by SATA 2.
SATA 3 was introduced to allow for faster communication between storage drives and the host controller on motherboards. This was necessary because SATA 2 was proving to be a bottleneck for faster storage devices like Solid State Drives.
While SSDs benefit from the transfer speed of SATA 3, hard disk drives do not see any improvement in performance. That is because SATA is just the speed at which the storage drive can communicate with the host controller on the motherboard i.e. the transfer speed. It says nothing about how fast a storage drive can access data internally. Because hard disk drives are mechanical in nature they cannot operate fast enough to saturate a SATA 2 interface much less a SATA 3 one. So hard drives don’t benefit from SATA 3 except for burst transfers from the hard drive buffer. These burst transfers are very rare in normal desktop usage where file access tends to be random in nature.
Best printer 2012: 16 top inkjet and laser printers
Best printer 2012: 16 top inkjet and laser printers
These aren't much larger than regular printers, but they're a whole lot more versatile, especially when you need to keep a copy of a letter, a bill or any other important document, so our first list includes the best inkjet printers and best multi-function devices.
You should also think carefully about whether to invest in an inkjet or a laser. Lasers are usually associated with office environments, where they produce sharp, smudge-free printouts quickly, quietly and economically, but this can be just as useful at home or in a home office.
And don't imagine that mono laser printers are the only option - colour laser printers are now very affordable, and you can even get get multi-function laser printers, too. So we've also come up with a list of the best laser printers, and not just for office users with budgets to burn, but home users looking for value, quality, compactness and ease of use.
So let's firstly look at the best inkjet printers around - hit the second page for the best laser printers. Please remember that the prices shown here are for guidance only.
1. HP DeskJet 1000 – £30
How do they do it for the money? It's not just that this printer is cheap, because with most budget printers you get stung later on with high-priced consumables, but the black and tri-colour ink cartridges for the DeskJet 1000 are pretty reasonably priced, and you can get XL high-capacity versions too. And for a budget printer, it's pretty fast, with a quoted maximum of 16ppm mono, 12ppm colour. There are no fancy extras - you even have to supply your own USB cable - but it does exactly what it says on the box, providing low-cost, fuss-free printing for as little money as possible.
Buy from Amazon
2. Epson Stylus SX425W - £60
Read our Epson Stylus SX425W review
3. HP Photosmart 7510 - £120
Read our HP Photosmart 7510 review
4. Lexmark Genesis S815 - £120
5. Canon Pixma MX870 - £150
Read our Canon PIXMA MX870 review
6. Kodak ESP 9250 - £160
Read our Canon Kodak ESP 9250 review
7. Canon Pixma MG8150 - £193
8. Canon Pixma iP100 - £200
Read our Canon Pixma iP100 review
9. HP Envy 110 All-in-One - £220
10. Brother MFC-J6910DW - £284
Best printer: best laser printers
Buying Guide The best inkjet printers and best laser printers around
1. Samsung ML-1665 - £70
Buy from Amazon
2. Brother DCP7030 - £115
Buy from Amazon
3. Xerox Phaser 6125 - £133
4. HP LaserJet P2055d - £157
Buy from Amazon
5. Samsung CLX-3185FW - £290
Buy from Amazon
6. Brother HL-4150CDN - £380
Read our Brother HL-4150CDN review
Friday, 19 October 2012
USB 3G/4G Router @ Rs.3000
TP-Link 3G/4G Router (support PTCL & Other USB Services to connect through router and access internet via Cable and wireless to other Internet devices)
Subscribe to:
Posts (Atom)