Comparison Asus ZenBook 14X OLED Q420VA [Q420VA-EVO.I7512] vs Asus Vivobook S 14X OLED S5402ZA [S5402ZA-M9164W]

General device type.

In addition to traditional laptops, nowadays you can find varieties such as netbooks, ultrabooks, 2 in 1 tablet laptops and transformers. Here are their main features:

— A laptop. Laptops of a more or less traditional format that do not belong to any of the specific categories described below. The classic, most popular screen size in these models is 15.6 ". 13.3" and 14" laptops are considered compact, laptops with a 17.3" screen are large-format, and larger displays are found in advanced gaming models. At the same time, devices from this category are also very diverse in terms of characteristics and capabilities: they range from “typewriters” designed for education and home tasks, to high-end gaming solutions, and workstations and multimedia complexes.

— Ultrabook. High-end laptops that combine compactness, light weight and advanced features. The diagonal in ultrabooks ranges from 11 "to 14", the thickness of the case does not exceed 21 mm, while the internal equipment usually includes powerful processors, a large amount of RAM, fast drives like SSD and other similar solutions. In addition, many devices from this category are made in a characteristic stylish design and are also designed for...the role of fashion accessories.

— Transformer 360°. Another type of laptop that can turn into a tablet. However, unlike the laptops-tablets described above, in this case, not a removable keyboard is used, but a special swivel connection of the upper and lower blocks. The design of this connection is such that the top of the device can be rotated 360° and placed face up on the keyboard. Thus, the transformer can be converted from a laptop to a tablet without removing the bottom half; this is the fundamental difference between such models and the “2-in-1” described above. This format of work is generally more convenient — no need to look for a place for the removed keyboard, there is no risk of forgetting or losing it; in addition, the mounting design usually allows you to use the device in the format of a “photo frame” — an inclined tablet on a stand without a keyboard. Thus, transformers have become more widespread today than collapsible laptops-tablets. Their disadvantages include the inability to reduce weight by removing the keyboard. The diagonal of such devices can be from 12" to 17".

— 2 in 1 (laptop-tablet). Laptops that can turn into tablets. In such models, the entire “hardware” (or at least its key components) is placed in the upper half, the screen is made touch-sensitive, and the lower half with the keyboard can be completely separated. From traditional tablets, which can also be equipped with keyboards, such devices differ in three main points. The first is more powerful hardware: in particular, most 2-in-1 models carry full-fledged laptop processors (up to and including Core i7), while tablets mainly use CPUs similar to smartphone chips. The second point is a larger screen size, usually 13 – 15". The third caveat is that the keyboard of a laptop-tablet can include not only a set of keys and a spare battery, but also some system components: a discrete graphics card, an additional drive, etc. .
In general, 2-in-1 models are more versatile than traditional laptops; however, nowadays they are much less common than another similar type of laptop — transformers (see below). This is due to the fact that the removable keyboard is not always convenient: when using a device in tablet format, it usually has to be removed; it is not always possible to find a place nearby for the removed keyboard; besides, it can be forgotten or lost through inattention. However, this design also has advantages: for example, if there is enough tablet on the road, there is no need to carry additional cargo in the form of the lower half of the device.

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 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.

VESA DisplayHDR certified, which corresponds to a screen that supports HDR technology.

See above for more details on this technology. And VESA DisplayHDR is an open standard that defines the overall image quality on an HDR screen by a number of parameters — brightness, colour depth, etc. Based on the test results, a screen that meets the required parameters is assigned a certain certificate with a numerical designation. So, the minimum level is DisplayHDR 400, the maximum is DisplayHDR 1400 (although in laptops, as of the end of 2020, there are no screens higher than DisplayHDR 1000). The number in such a designation is indicated by the brightness that the screen must provide: for example, DisplayHDR 400 must produce at least 400 cd / m2. Accordingly, a higher number denotes more extensive display capabilities and more advanced HDR performance.

A separate case is the DisplayHDR True Black certifications. This standard was specifically created for so-called emissive displays such as OLED (see "Matrix type"), which are capable of displaying very deep blacks. The native brightness of such displays is not very high — in particular, the current DisplayHDR 400 True Black and DisplayHDR 500 True Black provide a total screen brightness of only 250 and 300 cd / m2, respectively (against 400 and 500 cd / m2 in the original standards, without the addition " True Black"). However, in terms of black transmission efficiency, such di...splays surpass conventional HDR counterparts by orders of magnitude, which gives a noticeable increase in image quality — in particular, the mentioned True Black standards with indexes 400 and 500 win even when compared with conventional DisplayHDR 1000. However, it should be taken into account that that this advantage is most noticeable in relatively dim ambient light.

A display with a touch-recognizing sensor, similar to those used in modern tablets. The touch screen significantly expands the possibilities for managing a laptop: in some situations — for example, when viewing maps — it is most convenient to control the device precisely by touching the display.

Note that by definition, all transformers and 2-in-1 models are equipped with touch screens (see "Type"), but in more traditional laptops this feature is extremely rare — in such devices it is usually more convenient to use a keyboard and mouse.

The presence of Gorilla Glass in the design of the laptop display; the specific version of such material may also be specified in this paragraph.

The Gorilla Glass brand produces special tempered glass, which, despite its small thickness, has excellent characteristics of strength, transparency and scratch resistance. In general, this coating is more advanced than more traditional materials used in laptops (such as matte or glossy plastic), but it is also more expensive; therefore, it is found mainly in fairly expensive models with high-quality displays, including touch ones.

As for the different versions of this coating, they differ both in protective properties and in a number of other characteristics. Here are the main options relevant today:

- Gorilla Glass v3. The oldest current version was released in 2013. However, even this coating is noticeably superior to traditional glass (not to mention plastic) in terms of transparency and scratch resistance.

- Gorilla Glass NBT. The same age as the v3 version described above, released in 2013. The main feature is that the NBT coating was originally developed specifically for laptops with touch screens (while v3 was created mainly with smartphones in mind). The manufacturer claims, in particular, 8 to 10 times greater scratch resistance than conventional glass (including retention of strength when scratches occur and reduced visibility of such damage)..., as well as impact resistance and low sensitivity to fingerprints. However, there is no data on the fundamental differences between such glass and regular v3.

- Gorilla Glass v4. Version released in 2014. A key feature is that the design of this coating focused on impact resistance (whereas previous generations focused primarily on scratch resistance). As a result, the glass turned out to be twice as strong as in version 3, despite the fact that its thickness was only 0.4 mm.

- Gorilla Glass v5. An improvement to the "gorilla" released in 2016 that aims to further improve impact resistance. According to the developers, the v5 glass turned out to be 1.8 times stronger than its predecessor; it remained intact in 80% of drops from a height of 1.6 m “face down” onto a rough surface.

- Gorilla Glass v6. Version introduced in 2018. This coating claims to have a 2-fold increase in strength compared to its predecessors, as well as the ability to withstand multiple drops on a hard surface (in tests, v6 glass successfully withstood 15 drops from a height of 1 m).

- Gorilla Glass v7. Gorilla Glass v7 provides reliable protection for your laptop screen from impacts, drops and scratches. This generation promises an increase in drop resistance by approximately 150%, and scratch resistance by as much as 200%.

- Gorilla Glass DX. A version originally created for smart watches and other compact gadgets; It is extremely rare among laptops - in some “2-in-1” models. It was introduced in 2018 along with Gorilla Glass v6. The key improvements in this version include, in particular, increased anti-reflective properties and an increase in the contrast level of the visible image by 50%; the latter, among other things, makes it possible to reduce the actual brightness and, accordingly, the power consumption of screens without compromising image quality.

The specific model of the processor installed in the laptop, or rather, the processor index within its series (see above). Knowing the full name of the processor (series and model), you can find detailed information on it (up to practical reviews) and clarify its capabilities.

The code name for CPU installed in the laptop.

This parameter characterizes, first of all, the generation to which the processor belongs, and the microarchitecture used in it. At the same time, chips with different code names can belong to the same microarchitecture/generation; in such cases, they differ in other parameters - general positioning, belonging to certain series (see above), the presence / absence of certain specific functions, etc.

Nowadays, the following code names are relevant in Intel processors: Coffee Lake, Comet Lake, Ice Lake, Tiger Lake, Jasper Lake, Alder Lake, Raptor Lake (13th Gen), Alder Lake-N, Raptor Lake (14th Gen), Meteor Lake (Series 1), Raptor Lake (Series 1), Lunar Lake (Series 2). For AMD, the list looks like this: Zen 2 Renoir, Zen 2 Lucienne, Zen 3 Cezanne, Zen 3 Barcelo, Zen 3+ Rembrandt, Zen 3+ Rembrandt R, Zen 2 Mendocino, Zen 3 Barcelo R, Zen 4 Dragon Range, Zen 4 Phoenix Zen 4 Hawk Point, Zen 5 Strix Point. Detailed data on different code names can be found in special sources.

The clock speed of the processor installed in the laptop (for multi-core processors, the frequency of each individual core).

Theoretically, a higher clock speed has a positive effect on performance, as it allows the processor to perform more operations per unit of time. However, in fact, the capabilities of the CPU depend on a number of other characteristics — primarily on the series to which it belongs (see above). It even happens that of the two chips, the more performant in the overall result is the slower one. With this in mind, it makes sense to compare by clock frequency only processors of the same series, and ideally, also of the same generation; and the laptop as a whole should be judged by the complex characteristics of the system, as well as by the results of tests (see below).