Lenovo V15 G4 IRU Intel® Core™ i5 i5-13420H Laptop 39.6 cm (15.6") Full HD 16 GB DDR4-SDRAM 512 GB SSD Wi-Fi 5 (802.11ac) English Black

The display size describes the size of the visible part of the screen of your portable computer across the diagonal in inches. Average portable computers have 15.4" standard or 15.6" wide-screen displays. The ultra compact category portable computers have the display size of about 10,1".

Some portable computers have the option of turning the screen to the angle of 180 degrees and close it with the keyboard – the result is a true tablet computer without a keyboard. These models are sometimes referred to as transformers or tablets - they can be used both as a standard portable computer and as a tablet computer. This option is very handy for reading or, for example, drawing when the keyboard is not required.

Portable computers that are positioned as a replacement of desktop computers sometimes have the screen as big as 17". A bigger monitor is usually required for editing graphics or reviewing big-size tables, etc. However, it has to be considered that a bigger screen means a bigger size and usually also a bigger weight of the computer, besides it can be damaged more easily during opening and closing.

The maximum resolution of the display indicates the number of colour points (pixels) on the computer screen. The higher the resolution the better quality (more detailed) image. For example, 1366x768px means that your computer has 1366 points horizontally x 768 points vertically. High resolution provides more information on the screen and this is directly related to the size of the screen. Nowadays even a 12.1 inches screen can have 1024x768 resolution. At the first glance it looks that this resolution is too high for this size of the screen, however, high resolution provides more comfort.

WVGA (800x480) is characteristic for old portable computers and mini tablet computers of the new generation. WSVGA – ultra mobile portable computers with the display of 10.1’’ (the resolution of 1024x600 can be seen more often).

WXGA (1280x800) – this resolution is mainly characteristic of 12.1’’, 13.3’’, 14.1’’ screen with the relation of sides of 16:9.

HD 1366x768 and 1600x900 is a widespread resolution for the budget and middle class portable computers.

Full HD (1920x1200) resolution combined with high capacity video cards (NVidia Quadro FX vai ATI FireGL) is intended for the professional level 3D modelling work.

WUXGA (1920x1200) – ultra extended graphical arrangement (screen16:10) is intended for watching HD TV.

Attention has to be paid also to the contrast and brightness of the screen. The screen must have the maximum brightness for using the portable computer even in very bright lighting conditions.

This index determines the number of cores in the computer CPU. Each core is like a separate CPU that is capable of operating various applications separately. Thus, if there are several cores the operating system of the computer can distribute the load evenly between cores, so that the computer user can, for example, listen to music, browse the Internet and download files at the same time.

HyperThreading is the ability of the computer CPU to process several data flows in each core. For the two core CPU the HyperThreading is 4 and it means that certain tasks can be handled by this two core CPU at the same quality as the four core CPU.

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. TopPC.fi 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.

AnSSD, or Solid State Drive, is a modern storage device that, unlike hard disk drives (HDDs), has no moving parts and stores all information on NAND memory chips. This is why SSDs are much more reliable, as they can withstand shock, vibrations and temperature changes much better. The main advantage is the high data transfer speeds as well as the lowaccess time. Currently, SSDs equipped with a SATA 3 port deliver data transfer speeds of 500 MB/s on average. However, some drives using M.2 or PCI-Express ports have data throughputs

2000 MB/s.

USB 2.0 is the most popular connection slot for the computer peripheral devices. Thanks to this connection slot it is possible to connect mice, keyboards, webcams, printers, USB flash memories, external HDDs and numerous other devices to the computer. The higher the number of available USB2.0 ports, the better.

USB 3.0 is the newest and fastest USB standard that allows to connect all the devices of the preceding USB2.0 generation and the new USB3.0 generation.

The true advantage of this connection can be seen when the USB3.0 external HDD or the USB3.0 flash memory is connected to the USB3.0 connector. This speed of operation of this solution can exceed the predecessor USB2.0 standard by several times and even the current speed record holder - FireWire connection.

HDMI is the digital image and sound transmission standard that allows to connect a TV set, monitor or projector supporting HDMI to the computer via the HDMI cable.

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.

Which keyboard should be chosen - English or English/Russia - this choice depends on your needs and the language you use on daily basis. The arrangement of the keys of the keyboard should be as close as possible to the version of the keyboard of desktop computers.

currently almost all the portable computers are equipped with the full-size keyboard (with a separate number pad). Function keys have to be located in a rational way, so that it is not necessary to get used to them by searching for them in unusual corners of the keyboard.

Trackpoint is a small-size cursor-lever placed directly in the middle of the keyboard keys. It can be very handy because it is not necessary to take your hands off the keyboard as it is in case of a touch pad. This function is characteristics of many Lenovo ThinkPad series portable computers.