Overclocking is a procedure often done to make a computer perform faster. The process can be applied to certain hardware components to make it perform at a higher clock rate.
The clock rate refers to the number of clock cycles per second. It is the speed in which the computer performs simple processes. Clock rate is measured in hertz.
Overclocking can be done on a number of computer parts, like processors, video cards, and motherboard chipsets.
The process is often done by computer enthusiasts who want to make their computer system run faster. Some computer resellers overclock a low-cost system and resell it for a profit.
Computer parts are marked with a specific performance rate. These may be the exact rate at which the parts passed standard testing. Some parts are marked at a lower rate to ensure that they do not malfunction. Manufacturers may rate parts at a lower rate to make sure that they are sold at a standard rate instead of being marked as a high-end component.
Before overclocking a computer, the user must make sure that the system is capable of handling the changes, and that the motherboard is capable of being overclocked. Some chipsets lack the features that allow their clock rates to be changed.
An overclocked system requires more power than the original system, but using incorrect settings or too much power can damage it. Overclocking the computer will also make it generate more heat. A new cooling system may be needed to counteract this effect. The system may become unstable after it has been overclocked. The warranty of the computer will also be voided once the system has been modified.
Two Ways to Overclock
There are two ways to overclock a CPU. Each has its own share of advantages and disadvantages. The first is through manipulating the CPU multiplier and the other is through the motherboard's front side bus (FSB).
When using the multiplier, computer users can only overclock the CPU and nothing else. They can diagnose any problems easier because no other components are involved. Computer users also have more freedom because it is relatively stable in relation to the other components. Although it is the most preferred way to overclock the CPU, it also possesses some disadvantages. The multiplier method can only be used for high end CPUs.
The Front Side Bus, on the other hand, is the most common method of overclocking the CPU. It can effectively speed up the rest of the computer system.
However, there may be times that other components of the computer will not be able to keep up once the user has overclocked the CPU. Components like RAM have a tendency to slow down with an overclocked CPU.
source form :http://www.symatech.net/overclock-cpu
Sunday, June 28, 2009
Monday, June 8, 2009
How to set up wireless
Choose a convenient location to begin installing your router such as an open floor space or table. This does not need to be the permanent location of the device. Particularly for wireless routers, you may find it necessary to re-position the unit after installing it as the cables / signals may not reach all areas needed. At the beginning, its better to choose a location where it's easiest to work with the router and worry about final placement later.
Plug in the router's electrical power source, then turn on the router by pushing the power button.
(Optional) Connect your Internet modem to the router. Most network modems connect via an Ethernet cable but USB connections are becoming increasingly common. The cable plugs into the router jack named "WAN" or "uplink" or "Internet." After connecting the cable, be sure to power cycle (turn off and turn back on) the modem to ensure the router recognizes it.
Connect one computer to the router. Even if the router is a wireless model, connect this first computer to the router via a network cable. Using a cable during router installation ensures the maximum reliability of the equipment. Once a wireless router installation is complete, the computer can be changed over to a wireless connection if desired.
Open the router's administration tool. From the computer connected to the router, first open your Web browser. Then enter the router's address for network administration in the Web address field and hit return to reach the router's home page.
Many routers are reached by either the Web address "http://192.168.1.1" or "http://192.168.0.1" Consult your router's documentation to determine the exact address for your model. Note that you do not need a working Internet connection for this step.
Log in to the router. The router's home page will ask you for a username and password. Both are provided in the router's documentation. You should change the router's password for security reasons, but do this after the installation is complete to avoid unnecessary complications during the basic setup.
If you want your router to connect to the Internet, you must enter Internet connection information into that section of the router's configuration (exact location varies). If using DSL Internet, you may need to enter the PPPoE username and password. Likewise, if you have been issued a static IP address by your provider (you would need to have requested it), the static IP fields (including network mask and gateway) given to you by the provider must also must be set in the router.
If you were using a primary computer or an older network router to connect to the Internet, your provider may require you to update the MAC address of the router with the MAC address of the device you were using previously. Read How to Change a MAC Address for a detailed description of this process.
If this is a wireless router, change the network name (often called SSID). While the router comes to you with a network name set at the factory, you will never want to use this name on your network. Read How to Change the Router SSID for detailed instructions.
Verify the network connection is working between your one computer and the router. To do this, you must confirmed that the computer has received IP address information from the router. See How to Find IP Addresses for a description of this process.
(If applicable) Verify your one computer can connect to the Internet properly. Open your Web browser and visit a few Internet sites such as http://compnetworking.about.com/.
Connect additional computers to the router as needed. If connecting wirelessly, ensure the network name (SSID) of each is computer matches that of the router.
Finally, configure additional network security features as desired to guard your systems against Internet attackers. These WiFi Home Network Security Tips offer a good checklist to follow.
Tips:
When connecting devices with network cables, be sure each end of the cable connects tightly. Loose cables are one of the most common sources of network setup problems.
What You Need:
A network router (wireless or wired)
Network adapters installed on all devices to be connected to the router
A working Internet modem (optional)
A Web browser installed at least one computer in the network
Plug in the router's electrical power source, then turn on the router by pushing the power button.
(Optional) Connect your Internet modem to the router. Most network modems connect via an Ethernet cable but USB connections are becoming increasingly common. The cable plugs into the router jack named "WAN" or "uplink" or "Internet." After connecting the cable, be sure to power cycle (turn off and turn back on) the modem to ensure the router recognizes it.
Connect one computer to the router. Even if the router is a wireless model, connect this first computer to the router via a network cable. Using a cable during router installation ensures the maximum reliability of the equipment. Once a wireless router installation is complete, the computer can be changed over to a wireless connection if desired.
Open the router's administration tool. From the computer connected to the router, first open your Web browser. Then enter the router's address for network administration in the Web address field and hit return to reach the router's home page.
Many routers are reached by either the Web address "http://192.168.1.1" or "http://192.168.0.1" Consult your router's documentation to determine the exact address for your model. Note that you do not need a working Internet connection for this step.
Log in to the router. The router's home page will ask you for a username and password. Both are provided in the router's documentation. You should change the router's password for security reasons, but do this after the installation is complete to avoid unnecessary complications during the basic setup.
If you want your router to connect to the Internet, you must enter Internet connection information into that section of the router's configuration (exact location varies). If using DSL Internet, you may need to enter the PPPoE username and password. Likewise, if you have been issued a static IP address by your provider (you would need to have requested it), the static IP fields (including network mask and gateway) given to you by the provider must also must be set in the router.
If you were using a primary computer or an older network router to connect to the Internet, your provider may require you to update the MAC address of the router with the MAC address of the device you were using previously. Read How to Change a MAC Address for a detailed description of this process.
If this is a wireless router, change the network name (often called SSID). While the router comes to you with a network name set at the factory, you will never want to use this name on your network. Read How to Change the Router SSID for detailed instructions.
Verify the network connection is working between your one computer and the router. To do this, you must confirmed that the computer has received IP address information from the router. See How to Find IP Addresses for a description of this process.
(If applicable) Verify your one computer can connect to the Internet properly. Open your Web browser and visit a few Internet sites such as http://compnetworking.about.com/.
Connect additional computers to the router as needed. If connecting wirelessly, ensure the network name (SSID) of each is computer matches that of the router.
Finally, configure additional network security features as desired to guard your systems against Internet attackers. These WiFi Home Network Security Tips offer a good checklist to follow.
Tips:
When connecting devices with network cables, be sure each end of the cable connects tightly. Loose cables are one of the most common sources of network setup problems.
What You Need:
A network router (wireless or wired)
Network adapters installed on all devices to be connected to the router
A working Internet modem (optional)
A Web browser installed at least one computer in the network
Tuesday, April 21, 2009
Introduction of HTML
| HTML is created as a text file with special codes embedded in it's content to direct the browser how to display the content. The special codes embedded are called tags. An example of an HTML Tag is "<>", which is used to designate Text is being Bold. You'll not that the Tag begins with a Less Than (<) and ends with a Greater Than (>). | |
| Many times these tags appear in pairs (that are coincidentally referred to as Tag Pairs). In this case the second tag in the pair has a "/" immediately after the Less Than (<). So for the case of the beginning "" tag, the ending tag would be "". And for Bolding text this makes sense. All the text between the beginning and ending tag will be displayed as bold. | |
| There will be several examples throughout the document but you can also got to the "Samples" page and look at the examples and also manipulate them right on the screen. |
Monday, January 19, 2009
Prevent from hackers
Step1
Always create a login there are huge number of new clients on existing sites whose entire back end does not even have a login. It is simply just asking for trouble and it shows the lack of knowledge the previous developer had. Step2
Try to avoid using Internet Explorer. Internet Explorer is vulnerable to some hacking tools like spy ware, and other security issues, which make it a constant security threat. Install “Firefox” or any other alternative web browser when using the web application or when training your clients on your new web application Step3
Do not forget to update your open source applications. If you do maintain any web sites than you need to check it regularly for updating the web applications and install them on their web site Step4
Always encrypt your web application with SSL to avoid any one sniffing the data you are transmitting back and forth. Sniffing is another way by which hackers can gain usernames and passwords easily and get full access to your application. Step5
Change your password after 1 or 2 weeks. This method is typically used to get resistance from hackers who manage to steal passwords Step6
Always use strong passwords. Avoid using your last name, first name as password or simple word for logging into your system. A good password is the one, which does not make any sense and is hard to remember. Use combination of upper and lower case letters, digits, and punctuation to help prevent against dictionary attacks. Step7
If you have installed a common open source application like “MediaWiki”, “Movable Type”, “Word Press” or “phpMyadmin” etc then these applications are normally installed at default locations like “wp”, “admin”, “phpMyAdmin”, or other folders which provides hackers a good guess at where your login screen is. As these applications are open source so hackers can easily find old security laps in the code and then exploit them if you have not yet upgraded your system. If you are going to install one of these applications then install them to a unique directory, which will be different than the default location. You will be safer from most hacking attempts Step8
Another threat is the “SQL Injection attacks” which can grant a hacker direct access to your whole web application. To avoid SQL injection attacks; make sure you are escaping variable data before running SQL scripts to return login information for your system in nutshell. Step9
9. Always link to open source software. Use a search engine to find web sites that link to Word Press.org and you will find thousands of blogs, which link back to Word Press because they use the popular blogging software. Now in this case hacker has a list of potential word press blogs to exploit. Do not to link back to the software you are using. It will prevent your site as a potential hacking victim.Articles sources : http://www.ehow.com/how_2171609_prevent-website-hackers.html?ref=fuel&utm_source=yahoo&utm_medium=ssp&utm_campaign=yssp_art
Prevent from hackers
Step1
Always create a login there are huge number of new clients on existing sites whose entire back end does not even have a login. It is simply just asking for trouble and it shows the lack of knowledge the previous developer had. Step2
Try to avoid using Internet Explorer. Internet Explorer is vulnerable to some hacking tools like spy ware, and other security issues, which make it a constant security threat. Install “Firefox” or any other alternative web browser when using the web application or when training your clients on your new web application Step3
Do not forget to update your open source applications. If you do maintain any web sites than you need to check it regularly for updating the web applications and install them on their web site Step4
Always encrypt your web application with SSL to avoid any one sniffing the data you are transmitting back and forth. Sniffing is another way by which hackers can gain usernames and passwords easily and get full access to your application. Step5
Change your password after 1 or 2 weeks. This method is typically used to get resistance from hackers who manage to steal passwords Step6
Always use strong passwords. Avoid using your last name, first name as password or simple word for logging into your system. A good password is the one, which does not make any sense and is hard to remember. Use combination of upper and lower case letters, digits, and punctuation to help prevent against dictionary attacks. Step7
If you have installed a common open source application like “MediaWiki”, “Movable Type”, “Word Press” or “phpMyadmin” etc then these applications are normally installed at default locations like “wp”, “admin”, “phpMyAdmin”, or other folders which provides hackers a good guess at where your login screen is. As these applications are open source so hackers can easily find old security laps in the code and then exploit them if you have not yet upgraded your system. If you are going to install one of these applications then install them to a unique directory, which will be different than the default location. You will be safer from most hacking attempts Step8
Another threat is the “SQL Injection attacks” which can grant a hacker direct access to your whole web application. To avoid SQL injection attacks; make sure you are escaping variable data before running SQL scripts to return login information for your system in nutshell. Step9
9. Always link to open source software. Use a search engine to find web sites that link to Word Press.org and you will find thousands of blogs, which link back to Word Press because they use the popular blogging software. Now in this case hacker has a list of potential word press blogs to exploit. Do not to link back to the software you are using. It will prevent your site as a potential hacking victim.Articles sources : http://www.ehow.com/how_2171609_prevent-website-hackers.html?ref=fuel&utm_source=yahoo&utm_medium=ssp&utm_campaign=yssp_art
Saturday, January 17, 2009
What is Network
A group of two or more computer systems linked together. There are many types of computer networks, including:
In addition to these types, the following characteristics are also used to categorize different types of networks:
Computers on a network are sometimes called nodes. Computers and devices that allocate resources for a network are called servers.
(v.) To connect two or more computers together with the ability to communicate with each other.
Articles source : http://www.webopedia.com/TERM/N/network.html
Friday, January 16, 2009
Comparison linux and windows
Most standard computer programs are available for Linux. If you depend on specialized programs, such as specific genealogy programs, you will need to run Windows; more about this at the end.
Several Linux programs can read and write Microsoft Office files. So, if all you do with a computer is manage e-mail, create documents, create graphics files and use spreadsheets, Linux programs do all those things very well.
Until recently Linux has been more difficult to install and use than Windows. However, over the last two years there has been a concerted effort by several Linux companies to make Linux easy to use by an average user.
But why should one bother learning to use a new operating system other than the Windows one she is now using?
Here are the reasons:
- Linux hardly ever crashes, mainly because the basic low-level operating program (called the kernel) that keeps the computer running is small. So, even when things go wrong with some higher-level part of the operating system or with a program, the kernel keeps chugging away.
- Linux almost never has to be rebooted after installing a new program. This saves much valuable user time and aggravation over the life time of a machine.
- In most cases the Linux file system does not have to be defragmented regularly, such as Windows does, to keep it from slowing down.
- Linux allows up to 16 different views of the desktop, I use 4 of them. In other words, programs that are running can be associated with different views of the desktop; you will see only the program windows for the desktop view of current interest. It is easy to switch from one desktop view to another by buttons on the task bar.
- There are many free or inexpensive programs available for Linux.
- It cost less to install and operate.
By the way, most of the servers that provide web pages on the Internet are running Linux.
There are several different versions of Linux that are vying now for the desktop market. I have tried Red Hat and Linspire (previously called Lindows, a version of Debian). I highly recommend LinSpire (http://www.linspire.com) for general users for the following reasons:
- It is inexpensive.
- It is designed to look and operate very much like MS Windows.
- It installs easily and fast.
- It comes loaded with all the programs that are needed for web browsing, e-mail, and word processing and many other tasks.
- It has good on-line support.
- It has an inexpensive add-on called Click-N-Run that allows the user to simply click on hundreds of programs toLinspire install them on Linspire. (Buy Linspire and Click-N-Run together to save money.)
- Permission is not needed from Microsoft or Linspire.com to move Linspire from one machine to another owned by the same person. In fact, it can be installed on as many computers as there are in a given home at no extra charge.
- You can install it as a dual boot with a Windows system in order to try it out while still keeping Windows available.
- You can get Linspire on an inexpensive light-weight notebook.
If there is a need for a few specialized programs that are not available for Linux, one can run Win4Lin in Linspire in order to be able to run Windows 98 (Win4Lin Version 9x) or Windows XP (Version Pro 1.1). the total cost for both Win4Lin and Windows 98 is about $200. I have done this on my Linspire notebook and it works very well. You can buy Win4Lin 9x on Click-N-Run.
One last note: Linspire does not automatically set up a non-root account. It is best to do that and always run programs from that account. Then only use the root account when changes need to be made to the system that only a root account is allowed to do.
For information about how I set up a Linspire light-weight notebook to run Windows 98: http://www.roperld.com/GenLinNotebook.htm
Articles source : http://arts.bev.net/roperldavid/Linwincomp.htm
Subscribe to:
Posts (Atom)
