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The processor clock frequency is among the main criteria of the processor performance. This index determines the number of operations that each CPU core can perform per second. The higher the CPU clock frequency the faster the computer will be perform the given computing tasks.

The CPU cache memory is the place where the CPU stores (buffers) the data intended for processing for a short time. The volume of the cache memory is important in determining the high-speed operation of the CPU and, thus, the overall high-speed operation of the computer itself. Bigger volume of cache memory means higher-speed operation.

RAM is a short-term data storage. This component determining the operation speed:

• allows the CPU of your computer to have fast access to the information that needs to be processed used by the computer application which you have opened;
• at the moment of opening an application stores it in its microchips, thus the memory capacity determines how many applications can be run by your computer simultaneously and also with how big data volume (pictures, texts, webpages) you can operate at once.

Thanks to the dense placement of chipsets the RAM of a portable computer has the same characteristics as the RAM of desktop computers. Dateks.lv recommends to use 3Gb or higher capacity RAM for general use.

This criterion determines the type of the RAM used by the computer,m and this is useful if you want to buy an additional memory module when you buy the computer or upgrade the existing RAM capacity in future.

The newest type of memory is DDR3. DDR2 represents an older generation accordingly.

Maximum RAM is the indicator of the upgrading possibilities of the portable computer determining how many Mb of RAM are supported by * this model of the portable computer.

*The possibilities of upgrading the RAM depend on the number of available free memory slots and on the amount of Mb memory in the basic configuration of the computer.

The hard disc is a component of the portable computer storing the operating system, applications and your files. Its size determines how many applications and files can be stored there. The capacity of the hard disc is measured in Gigabytes.(Gb).

When you select the capacity of the hard disc you have to consider what you plan to store there in the near future. Data volume will most probably increase and the new technologies will require higher memory capacity.

Video card is a device that displays information on the screen of a portable computer. This parameter indicates what is the model and manufacturer of the video card integrated with the portable computer. However, you can forget the visually impressive and 3D graphics shooting or driving games because this is an integrated video card. An integrated video card usually uses a fraction of the basic memory of the portable computer.

For office and study use Dateks recommends to buy a portable computer with Intel HD Graphics video card.

For playing 3D games and using graphics applications we recommend to buy a portable computer with ATI Radeon, Intel HD or Nvidia GeForce series video card. If 3D modelling is the major type of use - AutoCAD, Maya, 3DMAX, we recommend to buy a portable computer with Nvidia Quadro or AMD FirePro card.

The parameter "video card memory" indicates whether the video card will use a fraction of the RAM of the portable computer for performing its functions or the video card has own memory of a certain amount of MB.

This device allows to copy photos from the memory cards of digital cameras without connecting the camera. All you have to do is to insert the relevant card in the reader and all its content is available in the computer at the very same moment.

There are different types of cards (SD, MMC, xD, MS Pro, etc.), therefore you should verify whether the selected card reader supports the required type of the card.

Bluetooth connection provides secure wireless data transmission among various devices (at the distance of up to 150 m). This is a possibility for your portable computer to connect with your mobile phone, another portable computer, palmtop and other bluetooth devices without using any wires for exchanging Mp3 music, photos and documents. You can use bluetooth for connecting wireless headphones with a microphone, mouse, keyboard, printer and other devices supporting bluetooth connection.

Examples of use of the Bluetooth technology:

• transfer of files between computers or between a computer and another device;

• printing using Bluetooth enabled wireless printer;

• use of a Bluetooth equipped keyboard or mouse, listening to music via wireless headphones;

• synchronisation of the personal digital assistant (PDA) with a computer or another device;

• wireless connection to the Internet via the mobile phone or the modem server;

• connection to the Bluetooth personal network (PAN - this is the technology that allows to establish the Ethernet network with wireless links between portable computers, mobile phones and hand devices).

*For establishing a connection with a portable computer with bluetooth; all the devices to be connected need the bluetooth support.