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Sunday, June 28, 2009

Overclocking CPU

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

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