Comparison Acer Nitro 5 AN515-54 [AN515-54-51M5] vs Acer Nitro 5 AN517-51 [AN517-51-51S3]

Diagonal size of laptop display.

The larger the screen, the more convenient the laptop for watching high-definition movies, modern games, working with large-format graphic materials, etc. Large screens are especially important for multimedia and gaming models. On the other hand, the diagonal of the display directly affects the size and cost of the entire device. So if portability is key, it makes sense to pay attention to relatively small solutions; especially since most modern laptops have video outputs like HDMI or DisplayPort and allow connection of large-format external monitors.

In light of all this, the actual maximum for laptops these days is 17"(17.3"); however larger devices (18") reappeared at the beginning of 2023. The standard option for general purpose laptops is 15"(15.6"), less often 16", a diagonal of 13"(13.3") or 14" is considered small by the standards of such And smaller screens can be found mainly in specific compact varieties of laptops — ultrabooks, 2 in 1, transformers, netbooks; among such devices there are solutions for 12 ", 11" and even 10" or less.

The maximum brightness that a laptop screen can provide.

The brighter the ambient light, the brighter the laptop screen should be, otherwise the image on it may be difficult to read. And vice versa: in dim ambient light, high brightness is unnecessary — it greatly burdens the eyes (however, in this case, modern laptops provide brightness control). Thus, the higher this indicator, the more versatile the screen is, the wider the range of conditions in which it can be effectively used. The downside of these benefits is an increase in price and energy consumption.

As for specific values, many modern laptops have a brightness of 250 – 300 nt and even lower. This is quite enough for working under artificial lighting of medium intensity, but in bright natural light, visibility may already be a problem. For use in sunny weather (especially outdoors), it is desirable to have a brightness margin of at least 300 – 350 nt. And in the most advanced models, this parameter can be 350 – 400 nt and even more.

The contrast of the screen installed in the laptop.

Contrast is the largest difference in brightness between the lightest white and darkest black that can be achieved on a single screen. It is written as a fraction, for example, 560:1; while the larger the first number, the higher the contrast, the more advanced the screen is and the better the image quality can be achieved on it. This is especially noticeable with large differences in brightness within a single frame: with low contrast, individual details located in the darkest or brightest parts of the picture may be lost, increasing the contrast allows you to eliminate this phenomenon to a certain extent. The flip side of these benefits is an increase in cost.

Separately, we emphasize that in this case only static contrast is indicated — the difference provided within one frame in normal operation, at constant brightness and without the use of special technologies. For advertising purposes, some manufacturers may also provide data on the so-called dynamic contrast — it can be measured in very impressive numbers (seven-digit or more). However, you should focus primarily on static contrast — this is the basic characteristic of any display.

As for specific values, even in the most advanced screens, this indicator does not exceed 2000: 1. But in general, modern laptops have a rather low contrast ratio — it is assumed that for tasks that require more advanced image characteristics, it is more...reasonable to use an external screen (monitor or TV).

The colour gamut of the laptop matrix according to the Rec.709 colour model or according to sRGB.

Colour gamut describes the range of colours that can be displayed on the screen. It is indicated as a percentage, but not relative to the entire variety of visible colours, but relative to the conditional colour space (colour model). This is due to the fact that no modern screen is able to display all the colours visible to humans. However, the larger the colour gamut, the wider the screen's capabilities, the better its colour reproduction.

Specifically, sRGB and Rec.709 are the most popular of today's colour models; they have the same range and differ only in the scope (sRGB is used in computers, Rec. 709 is used in HDTV). Therefore, the closer the colour gamut is to 100%, the more accurately the colours on the screen will match the colours that were originally intended by the creator of the film, game, etc. At the same time, note that such accuracy is not particularly needed in everyday use — it critical only for professional work with colour; and even in such cases, it is more convenient to buy a separate monitor with a wide colour gamut for a laptop, rather than looking for a laptop with a high-quality (and, accordingly, expensive) matrix.

The colour gamut of the laptop matrix according to the Adobe RGB colour model.

Colour gamut describes the range of colours that can be displayed on the screen. It is indicated as a percentage, but not relative to the entire variety of visible colours, but relative to the conditional colour space (colour model). This is due to the fact that no modern screen is able to display all the colours visible to humans. However, the larger the colour gamut, the wider the screen's capabilities, the better its colour reproduction.

The Adobe RGB colour model was originally developed for print applications; the range of colours covered by it corresponds to the capabilities of professional printing equipment. Therefore, theoretically, the extensive coverage of this model will be useful to those involved in the design and layout of high-end printed products. However most laptop screens have very limited Adobe RGB values, rarely exceeding 74%; however, you can also find high-end models where this figure approaches 100%. Of course, the cost of such laptops will also be appropriate; therefore, it makes sense to pay attention to them, first of all, when the ability to work with colour “on the go” is of key importance. If this is to be done in one place, it may be more justified to buy a separate monitor with a wide colour gamut (especially since a monitor with such characteristics is easier to find than a laptop).

The volume of the second (additional) drive installed in the laptop.

Two drives used simultaneously in a laptop are most often of different types — for example, HDD and SSD of one kind or another (for more details, see "Drive Type"); however, there are also configurations for two media of the same type (for example, hard drives). Anyway, if separate storages have different volumes, then storage of a smaller capacity is usually considered additional. This is due to the fact that such a drive often performs an auxiliary function and is intended not so much to store data as such, but to speed up the system. A typical example is the HDD + SSD bundle, where it is the SSD that is considered the second carrier. But if there are two hard drives, they usually have the same volume, and in such cases the division into the first and second drives is purely conditional.

In light of all this, the volume of the 2nd drive is generally noticeably lower than that of the main one. In many devices, this parameter does not exceed 128 GB ; the average can be called 250 GB(more precisely, 240 – 256 GB); and a capacity of around 500 GB or more is considered pretty solid in this case.

Technology for direct wireless communication between various devices, in particular for connecting speakers, headphones, for transferring files, etc. Version plays a key role in Bluettoth's abilities. In modern realities, Bluetooth wireless protocols below revision 4 are no longer relevant. More about them:

— Bluetooth v 4.0. A fundamental update (after version 3.0), which introduced another data transfer format — Bluetooth Low Energy (LE). Bluetooth LE allows you to significantly save energy with such a connection.

— Bluetooth v 4.1. Development and improvement of Bluetooth 4.0. One of the key improvements was the optimization of collaboration with 4G LTE communication modules — so that Bluetooth and LTE do not interfere with each other. In addition, this version has the ability to simultaneously use a Bluetooth device in several roles.

— Bluetooth v 4.2. This version did not introduce fundamental updates, however, it received a number of improvements regarding reliability and noise immunity, as well as improved compatibility with the Internet of Things.

— Bluetooth v 5.0. Version introduced in 2016. The key innovations were the further expansion of the possibilities associated with the Internet of Things. In particular, in the Bluetooth Low Energy protocol (see above), it became possible to double the data transfer rate (up to 2 Mbit / s) at the cost of reducing the range, as well as quadruple the range at the cost of redu...cing the speed; in addition, a number of improvements have been introduced regarding the simultaneous work with numerous connected devices.

— Bluetooth v 5.1. Update of the version described above v 5.0. In addition to general improvements in the quality and reliability of communication, this update has implemented such an interesting feature as determining the direction from which the Bluetooth signal is coming. This makes it possible to determine the location of connected devices with an accuracy of up to a centimeter, which can be useful, for example, when searching for wireless headphones.

— Bluetooth v 5.2. The main innovations in this release are a number of security improvements, additional power optimization in LE mode, and a new audio signal format for synchronizing parallel playback on multiple devices.

Maximum laptop operating time on a single battery charge, without recharging. In this case, usually, the operating time in the maximum energy saving mode is implied: disabled wireless modules, minimum screen brightness, a small load on the processor, etc. Accordingly, the time of actual work on a charge is usually noticeably less than this indicator. Nevertheless, it can be used both for a general assessment of the battery life of a laptop, and for comparing it with other models. And choose work laptop ( from 7 operation hours) or with more powerful battery (from 11 operation hours).

The operating system (OS) installed on the laptop as standard.

The OS is the software base, the environment in which the rest of the “software” of the laptop functions. The capabilities of the device and its compatibility with certain software products largely depend on its brand and version / edition. Theoretically, the pre-installed operating system can be changed to another, but in fact this is not always justified. In particular, the pre-installed OS is usually optimally configured for a specific hardware configuration, while other options may not work correctly.

Among the operating systems relevant for modern laptops, it is worth noting, first of all, the various editions of Windows 10 — in particular, Windows 10 Home and Windows 10 Pro(including versions with the so-called S Mode), as well as Windows 11, which similarly have Home and Pro versions. . An alternative is Linux(including the Endless OS version); and Apple installs a proprietary solution on its laptops — macOS. Of course, devices are produced without a pre-installed OS at all (they also include laptops with DOS on board). Here is a more detailed description of these options:

— Windows...10. This OS was released in the fall of 2014 as the next update of the desktop OS family from Microsoft and the successor to Windows 8.1 (number 9 was omitted for technical reasons). It introduced many innovations, such as the built-in Cortana voice assistant, the Edge browser, support for multiple desktops, updated Start menu and notification centre, a major update of standard pre-installed programs, etc. In addition, the system also received an edition of Windows 10 Mobile, which gave a high degree of integration between smartphones and PC / laptops; however, the mobile version was generally unsuccessful and was discontinued in early 2020. Windows 10 is paid, its cost is included in the price of the device. Currently, among laptops it can be found in the following editions:

• Windows 10 Home. "Home" edition — designed mainly for undemanding users who do not need special professional features. Windows 10 Home has all the basic features of the system, but lacks corporate tools, as well as the ability to manage the Update Centre and access the computer via remote desktop.
• Windows 10 Pro. An extended edition of Windows 10 described above, designed for use in the professional field and designed for IT professionals and advanced enthusiasts. In addition to all the features available in the Home edition, it also offers a number of professional and corporate tools — in particular, Active Directory, remote desktop, BitLocker encryptor, and a tool for working with Hyper V virtual machines. however, the more advanced Pro For Workstations edition is designed for high-end workstations, and it simply does not make sense to use it in laptops.
• Windows 10 S Mode. “S-Mode” is a specific version of Windows 10 available for both the Home and Pro editions described above. Such solutions differ from the original OS in limited functionality. So, various programs can only be installed from the Windows Store, the ability to install from third-party sources is not available. This results in restrictions on the use of peripherals: for some external devices, special functions may not be available due to the inability to install a proprietary driver (however, manufacturers of such devices are gradually correcting the situation by writing applications for the Windows Store). Only the standard Microsoft Edge is available as a browser, and Bing is available as a built-in search engine. All this narrows the possibilities for using the system, but significantly increases its security and speed. The latter is especially effective with weak hardware: on such equipment, Windows 10 S Mode is much more comfortable to use than one or another original edition. As for security, it is ensured by careful control of applications published in the Windows Store. The creators position S Mode as the best solution for the educational sector, but in general, this edition is well suited primarily for simple tasks like Internet surfing or working with documents. It is possible to switch from S Mode to the regular version of Windows 10 in the appropriate edition for free — however, this action cannot be undone, and most often it leads to significant performance losses.

— Windows 11. The first major system update from Microsoft in the last six years since the release of "tens". The OS has redrawn most of the icons of standard programs and window controls, the lion's share of actions is accompanied by new animation. The main thing in the redesign is the Start menu button that has moved to a place in the centre of the lower part of the screen. Together with the operating system, Android applications debuted in the Microsoft Store. In general, the system can be considered as a big update of Windows 10 with a serious redesign of the interface, rather than a radically new OS.

As before, Windows 11 is divided into two large camps: Home and Pro. More narrowly targeted versions of this operating system (Education, Enterprise, Mixed Reality, etc.) are also being released.

— macOS. The operating system used exclusively in Apple computers and laptops. Until 2016 it was known as OS X, earlier, until 2012 — as Mac OS. In general, it is considered very reliable and stable, and not without reason: there are relatively few computers for this system, which allows you to well optimize the software part for specific hardware platforms. In terms of application, macOS has proven itself as a solution for professional use: working with documents, design, audio and video editing. At the same time, relatively few games have been created for this OS. The system is updated regularly, and updates are free and available for the life of the laptop. In addition, it is worth noting that macOS is increasingly integrated with Apple's mobile operating system — iOS. So, as of 2020, for owners of "apple" technology, in particular, the following features are available: moving tasks from device to device (for example, you can start writing a letter on a laptop and finish on a smartphone); shared clipboard; duplicating an image from a computer / laptop screen to an iPad; using a portable gadget as an interactive graphics tablet for Mac (including in notes); the possibility of voice and text (SMS) communication from a computer / laptop via a smartphone; transferring photos and scanned materials from a smartphone to a computer / laptop; Mac auto-unlock with Apple Watch, etc.

— Linux. Free and open source operating system. Developed and maintained by a community of programmers around the world. It has its own graphical interface and software tools, which is quite sufficient for solving most everyday tasks, and open source code gives experienced users ample opportunity to customize the system and write their own software. At the same time, there are different Linux distributions — both complex and advanced for enthusiasts, and simple and "friendly", designed for inexperienced users (the representative of the second category, in fact, is the Endless OS described below, but it is often positioned as a separate "OS") . In addition, almost no viruses and other malicious programs are made under Linux. In general, this OS is quite enough for most simple household and work tasks, but games and professional software for it are produced noticeably less than for Windows.

— EndlessOS. A free operating system, which is actually a specific distribution of the Linux described above. It has the same basic features and is fully compatible with Linux applications, and Endless OS has two key differences. Firstly, this OS was created for maximum simplicity, clarity and accessibility even for novice users. Secondly, the standard distribution of Endless OS includes more than 100 additional applications and a lot of reference materials — in case the user does not have the Internet or access to downloading applications is limited in speed or volume. However, there is an edition for those who have no difficulties with communication and who would like to independently choose a set of installed applications.

— DOS. Free operating system with minimal functionality: no graphical interface, controlled via a text command line. In fact, in modern laptops, such a system is intended solely for checking the overall performance; for other purposes, the use of DOS is impossible or does not make sense.

— No OS. The absence of any operating system in the laptop. This configuration does not allow using the device out of the box, but it has an important advantage: the user can choose a specific OS and its edition at his discretion, depending on current tasks and the available low-cost. However buying a paid “OS” separately from a laptop can cost more than purchasing a similar device with a preinstalled OS in the same edition; on the other hand, even with this in mind, such an option is often more preferable and profitable than buying a laptop with an unsuitable pre-installed OS.

The list of rarer and/or obsolete systems includes, in particular, the following:

— Android. Free and open source operating system developed by Google. Initially, it was created for mobile gadgets with the appropriate hardware (energy-efficient system-on-chip processors) and touch screens — primarily smartphones and tablets. Android itself is characterized by tight integration with Google services and an extensive set of applications available through the Google Play market; however, some manufacturers create proprietary software shells based on this OS, including support for their own services and software repositories. Specifically, in laptops, attempts to implement Android have not yet been particularly successful, so this OS can be found mainly in single models of transformers and 2-in-1 devices (see "Type"). This is partly due to the fact that this system is mainly entertainment and multimedia and is relatively poorly suited for work use (although the latter is also possible due to the abundance of applications).

— Windows earlier than Windows 10 (from newest to oldest):

• Windows 8 (in Core, Pro and RT editions);
• Windows 7 (five editions);
• Windows Vista (four editions);
• Windows XP.

All these systems are completely obsolete and are not installed on modern laptops. And for devices running Windows 7 and Windows 8, a free upgrade to Windows 10 is available.

— Chrome OS. Another software product from Google, originally created just for laptops (unlike Android). A key feature of Chrome OS is tight integration with web services: for example, until 2016, the system did not provide the installation of additional programs at all — instead, it was supposed to use web applications opened through the Chrome browser. Actually, Chrome is initially the software basis of the entire OS (hence the name). In the aforementioned 2016, it became possible to install Android applications from the Google Play store on Chrome OS. Specifically, laptops based on this operating system (“Chromebooks”), on the one hand, have shown themselves to be the most inexpensive and affordable devices, convenient, in particular, for use in the educational field. On the other hand, the lack of "native" applications can be a significant inconvenience; and software for Android is usually poorly optimized for ChromeOS — for a number of reasons, developers have little interest in such optimization. And the additional hardware capabilities of Chromebooks as a whole are noticeably more modest than those of their counterparts for Windows and macOS. As a result, such laptops are rare, and the prospects for the system itself are rather vague.

— Meego. Completely obsolete free operating system jointly developed by Nokia and Intel; has not been applied since 2013.