Comparison Lenovo IdeaPad S340 15 [S340-15IWL 81N800WNRA] vs Lenovo IdeaPad S145 15 [S145-15IWL 81MV0156RA]

The maximum amount of RAM that can be installed on a laptop. It depends, in particular, on the type of memory modules used, as well as on the number of slots for them. Paying attention to this parameter makes sense, first of all, if the laptop is bought with the expectation of and the amount of actually installed memory in it is noticeably less than the maximum available. So laptops can be upgraded in RAM to 16 GB, 24 GB a>, 32 GB, 48 GB, 64 GB and even more - 128 GB.

The clock speed of the RAM installed in the laptop.

The higher the frequency (with the same type and amount of memory) — the higher the performance of RAM in general and the faster the laptop will cope with resource-intensive tasks. However modules with the same frequency may differ somewhat in actual performance due to differences in other characteristics; but this difference becomes significant only in very specific cases, for the average user it is not critical. As for specific values, the most popular modules on the modern market are 2400 MHz, 2666 MHz, 2933 MHz and 3200 MHz. Memory at 2133 MHz or less is found mainly in outdated and low-cost devices, and in high-performance configurations this parameter is 2933 MHz, 3200 MHz, 4266 MHz, 4800 MHz, 5200 MHz, 5500 MHz, 5600 MHz and more.

The total number of slots for RAM modules provided in the laptop; in fact — the maximum number of slats that can be installed simultaneously in this model.

Features for upgrading RAM directly depend on this indicator. So, in low-cost models, there is often only 1 slot, and the only upgrade option is to replace the "native" bar. In more advanced devices, two or even four slots may be provided, while some of them may be free in the initial configuration.

A special case is embedded RAM; it is more compact and cheaper than removable modules, but does not imply replacement at all. At the same time, in some laptops, the “RAM” is only built-in, in others it can be supplemented with one or even two slots for interchangeable strips.

Number of USB 2.0 ports provided in the laptop.

USB of all versions is the most popular modern interface for connecting various peripherals to computer - from keyboards, mice and flash drives to very original devices. It can also be used to charge smartphones and other gadgets. The more USB ports laptop has, the more peripherals you can connect to it without using splitters. Specifically, USB 2.0 is the earliest version found in modern laptops. It uses regular full-size connector and provides speeds of up to 480 Mbit. In light of the emergence of faster and more advanced versions of USB 2.0, it is considered obsolete; more and more laptops are being produced that do not have such connectors at all. At the same time, this interface is still far from completely disappearing, especially since its capabilities are quite sufficient for many peripheral devices.

The number of USB-C 3.2 gen1 ports provided in the laptop (these connectors were previously labeled USB-C 3.1 gen1 and USB-C 3.0).

USB-C is a relatively new universal connector designed for use in desktop and laptop computers and other devices. It is slightly larger than microUSB, has a convenient double-sided design (it doesn’t matter which side you connect the plug), and also allows you to implement increased power supply and a number of special functions. In addition, the same connector is standardly used in the Thunderbolt interface versions v3 and v4, and technically it can be used for other interfaces; so in some laptops USB-C has a combined purpose — see "Alternate Mode" for more details. And in some models (mostly the most compact ones), USB-C can also charge the device’s own battery.

Specifically, USB-C version 3.2 gen1 allows connection speeds up to 5 Gbps. As for the number of such ports, it is most often small — usually 1 – 2. This is due to the fact that peripherals for USB-C are produced noticeably less than for full-sized USBs. However, in some configurations, the number of connectors of this type can reach 4.

The resolution of the webcam installed in the laptop. Such cameras are usually placed above the display; Initially, their purpose was video communication (for example, via Skype), but other applications are also possible — recording videos, live broadcasts of certain events on the Internet, etc.

The resolution of the webcam in this case is indicated by the maximum video resolution that it supports. The most low-cost options give out only 640x480 and are not suitable for anything, except for the mentioned video communication; in the most advanced, this indicator can reach Full HD quality (1920x1080 pixels) and even Quad HD.

There are also laptops that do not have a built-in webcam. This solution allows you to protect the user from the threat of hacker attacks through the laptop's camera and minimizes the likelihood of personal data leaking.

Movable shutter, with which you can cover the webcam lens. Such a device provides additional security: even if an attacker gains access to a laptop and tries to follow the user through a webcam, a closed lens will not allow him to see anything. In addition, the shutter protects the optics from various contaminants.

Note that relatively recently an alternative option has appeared — a switch on the laptop case, with which you can turn off the camera's power at the hardware level. Such a switch in our catalog is also referred to as a “camera shutter”, since its purpose and capabilities are completely similar.

The presence of backlight in the laptop keyboard. This feature not only gives the device a stylish look, but also makes the keys more visible than in non-backlit laptops. The specific functionality of the backlight can be different, it depends both on the price category and on the general purpose of the laptop. For example, single-color lighting is found both in low-cost laptops and in ultrabooks for professional use. And game models can provide advanced RGB lighting and even the ability to sync backlight.

The backlight colour is usually chosen by the manufacturer, taking into account the general specialization of the laptop. So, white backlighting is popular in “office” devices — it fits well into a discreet business style and at the same time looks good on its own. Yellow (golden) colour is much less common — mainly among fashion laptops, although there are exceptions. In turn, among gaming models, the most advanced kind of backlighting is often found — RGB: it allows you to choose a shade as you wish, besides, a colour change can signal various game and system events. A number of top gaming laptops feature 4-zone RGB backlighting on the keyboard, or even custom per-key backlighting that makes the...buttons visually stand out from the rest. Gaming devices are also being produced with simpler, solid-colour backlighting systems — in such cases, the keyboards usually glow red, green or blue. It is these shades that are best combined with the characteristic design of gaming laptops; at the same time, the red glow is usually used in devices with a rather catchy and “aggressive” appearance (and in itself is an important element of this style), while blue and green are typical for a more restrained design.

The number of additional keys provided on the laptop keyboard.

Additional are called keys that do not belong to the standard set and perform various specific functions: calling the browser, controlling the media player, switching power and cooling modes, etc. Such equipment facilitates quick access to certain settings and applications. On the other hand, additional keys require additional space, and there is not much of it in laptops; in addition, some specific functions can be implemented through the Fn key, pressed simultaneously with one of the standard buttons. Therefore, this function is relatively rare in modern laptops, mainly among gaming models.