Comparison Dell Inspiron 15 3582 [I35C445NIL-73B] vs Dell Inspiron 15 3573 [I35C45DIL-70]

The result shown by the laptop processor in the Passmark CPU Mark test.

Passmark CPU Mark is a comprehensive test that is more detailed and reliable than the popular 3DMark06 (see above). It checks not only the gaming capabilities of the CPU, but also its performance in other modes, based on which it displays the overall score; this score can be used to fairly reliably evaluate the processor as a whole (the more points, the higher the performance).

The number of additional M.2 connectors on the laptop motherboard.

In this case, any free M.2 connector is called additional (if there is an installed drive, the connector is considered the main one and its characteristics are given above — see "M.2 connector interface" and so on). There may be several such free slots — therefore, our catalog specifies the number of additional M.2 connectors, and not just their presence.

Anyway, this parameter will be useful primarily if the laptop is bought for an upgrade. It allows you to estimate how many M.2 SSDs (or other peripherals with such a connection) can be additionally installed in the device. At the same time, when choosing specific components, you should also take into account the interface and the size of free M.2 slots (see below for more details).

Connection connectors provided in the design of the laptop.

This paragraph mainly indicates data on video outputs: VGA, HDMI(versions 1.4, 2.0, 2.1 and their varieties), miniHDMI / microHDMI, DisplayPort, miniDisplayPort). In addition, the presence of other types of connectors can be specified here: audio S / P-DIF, service COM port. But information about interfaces such as full-sized USB, USB-C, Thunderbolt and LAN is provided in separate paragraphs (see below).

— VGA. Analogue video output, also known as D-Sub 15 pin. Technically considered obsolete: it has low noise immunity, does not provide sound transmission, and the maximum supported resolution in fact does not exceed 1280x1024. However, VGA inputs are still quite common in monitors today, and are also found in other types of video equipment — in particular, projectors. Therefore, some modern laptops, mainly for multimedia purposes, are equipped with similar outputs — counting on connection to the mentioned video devices.

— HDMI. The most popular modern interface for working with HD content. Uses digital data transmission, allows you to transmit high-def...inition video and multi-channel audio over one cable at the same time. Most modern monitors, TVs, projectors, and other HD-enabled video equipment have at least one HDMI input; so outputs of this type are extremely common in modern laptops.

— microHDMI and miniHDMI. Reduced varieties of the HDMI described above: they are completely similar in functionality and differ only in the size of the connector. They are installed mainly in the thinnest and most compact laptops, for which full-size HDMI is too cumbersome.

The HDMI and mini/microHDMI ports on modern laptops may correspond to different versions:

• v 1.4. The earliest of the commonly used standards, released in 2009. Allows you to transmit a signal in resolutions up to 4096x2160 at a frame rate of 24 fps, and with Full HD resolution, the frame rate can reach 120 fps; 3D video transmission is also possible.
• v 1.4a. The first addition to version 1.4, in which, in particular, two additional 3D video formats were added.
• v 1.4b. The second update of the HDMI 1.4 standard, which introduced only minor clarifications and additions to the v 1.4a specifications.
• v2.0. Global HDMI update introduced in 2013. Also known as HDMI UHD, it allows you to stream 4K video at frame rates up to 60 fps. The number of audio channels can reach 32, and up to 4 audio streams can be broadcast simultaneously. In addition, support for the 21:9 aspect ratio and some improvements regarding 3D content have been introduced.
• v2.0a. First HDMI 2.0 update. A key innovation was compatibility with HDR content (see "HDR support").
• v2.0b. Second update of version 2.0. Key innovations have affected mainly work with HDR — in particular, support for HDR10 and HLG has been added.
• v2.1. One of the newest versions, released in the fall of 2017. Further increases in bandwidth have made it possible to support 4K and even 8K video at frame rates up to 120 fps. In addition, key improvements include enhanced HDR capabilities. Note that to use the full capabilities of HDMI v2.1, HDMI Ultra High Speed cables are required, although basic functions are available with regular cables.

— Display port. Digital high-speed port, allows you to transfer both video and audio in HD quality. It is similar in many respects to HDMI, provides a higher data transfer rate and allows the use of longer cables, but is less common, mainly used in computer technology.

— miniDisplayPort. A smaller version of the DisplayPort described above, designed to make the connector more compact; except for the dimensions, it is no different from the original interface. Some time ago it was a regular video connector for Apple laptops; and even the Thunderbolt interface that replaced it, in versions 1 and 2 (see below), uses a connector identical to the miniDisplayPort connector.

Both full-size DisplayPort and its smaller version may be different versions. Here are the most popular options today:

• v 1.2. The earliest version common in laptops, released in 2010. Among the most important innovations presented in this version are 3D support, the ability to work simultaneously with several video streams for serial connection of screens (daisy chain), as well as the ability to work through the miniDisplayPort connector. Bandwidth v 1.2 is enough to fully support 5K video at 30 frames per second and 8K video — with certain limitations.
• v 1.2a. Update version 1.2, released in 2013. One of the most noticeable innovations is the ability to work with AMD FreeSync (see above). Bandwidth and supported resolutions remain unchanged.
• v 1.3. DisplayPort version released in 2014. Compared to the previous version, the throughput has been increased by 1.5 times for 1 line and almost 2 times for the whole connector (8.1 Gbps and 32.4 Gbps, respectively). This, among other things, made it possible to provide full support for 8K video at 30 fps, as well as increase the maximum frame rate in 4K and 5K standards to 120 and 60 fps, respectively. In daisy chain mode, this standard makes it possible to work with two 4K UHD (3840x2160) screens at a frame rate of 60 Hz, or with four 2560x1600 screens at the same frequency. In addition, Dual-mode support was introduced in this version, providing compatibility with HDMI and DVI interfaces through the simplest passive adapters.
• v 1.4. Version introduced in March 2016. Bandwidth, compared to the previous standard, remained unchanged, but some important features were added — in particular, support for Display Stream Compression 1.2 compression, HDR10 standard and Rec. 2020, and the maximum number of supported audio channels has increased to 32.
• v 1.4a. An update released in 2018 "quietly" — without even an official press release. The main innovation was the update of Display Stream Compression technology from version 1.2 to version 1.2a.

— S/P-DIF. Output for digital audio transmission, including multi-channel. It has two varieties — optical and electrical; the first is absolutely insensitive to interference, but uses rather delicate cables, the second does not require special care in handling, but can be subject to pickups (although the wires are usually made shielded). Laptops use mainly optical S/P-DIF, while for compactness this connector is combined with a mini-Jack jack for connecting headphones. However, anyway, it's ok to clarify the specific features of this interface separately.

— COM port. Universal interface for connecting various external devices — in particular, dial-up modems — as well as for direct connection between two computers. Also known as RS-232 (after the connector). Nowadays it is considered obsolete due to the spread of more compact, faster and more functional interfaces, primarily USB. However, many types of equipment, including specialized ones, use the COM port as a control interface. Such equipment includes uninterruptibles, satellite receivers and communication devices, security and alarm systems, etc. Thus, COM ports, although almost never used in consumer-level laptops, are still found in some specialized models.

The capacity of the included laptop battery in milliamp-hours (mAh).

Higher capacity allows the laptop to work longer on a charge, all other things being equal. However, keep in mind that the actual battery life will depend not only on the battery, but also on the power consumption of the laptop itself — and it is determined by both the hardware platform and the installed software. Therefore, only models with similar characteristics can be compared with each other according to this indicator. And if you need a “long-playing” laptop or laptop with very good battery life, you should choose it not by battery capacity, but by directly stated operating time.

Regarding milliamp hours, it is also worth noting that this is not a very reliable (although the most popular) unit of capacity: the actual amount of energy stored in a battery depends not only on milliamp hours, but also on the operating voltage. A more correct unit in this sense is watt-hours, for details on them, see p. "Battery capacity" below. As for specific numbers, the most modest models in this regard are equipped with batteries of 3000 – 4000 mAh and even less. 4000 – 5000 mAh can be called an average, 5000 – 6000 mAh is above average, and the most capacious laptop batteries can hold 6000 -7000 mAh or more.

The capacity of the complete laptop battery in watt-hours.

Higher capacity allows the laptop to work longer on a charge, all other things being equal. However, keep in mind that the actual battery life will depend not only on the characteristics of the battery, but also on the power consumption of the laptop itself — and it is determined by both hardware characteristics and installed software. Therefore, only models with similar characteristics can be compared with each other according to this indicator. And if you need a “long-playing” laptop, you should choose it not by battery capacity, but by directly stated operating time.

As for watt hours, this is a less popular unit of capacity than milliamp hours, but more physically correct: it accurately describes the amount of energy stored by a battery. Thanks to this, in terms of capacity in Wh, it is possible to compare batteries with different nominal voltages (whereas this is not allowed for mAh — additional calculations must be carried out using special formulas). At the same time, Wh can be easily converted to mAh if the battery voltage is known: for this, the capacity in Wh must be divided by the voltage and multiplied by 1000.

Rated voltage of the battery supplied with the laptop.

In fact, most users do not need to pay special attention to this parameter. The battery is selected by the manufacturer in such a way as to ensure the battery life and power efficiency planned for this model, so when choosing, it makes sense to look at more "close to life" indicators — first of all, the maximum operating time. Voltage data is needed mainly in specific cases — for example, when looking for a spare battery or transferring capacity from one unit to another (for more details, see "Battery Capacity").

The presence in the laptop of a removable battery — that is, a battery that can be removed without using special tools and without disassembling the device case. This feature provides a number of practical benefits. So, the battery can be easily changed if it is out of order, worn out or does not suit you according to its characteristics. And if you have a long stay "away from civilization" — you can even get spare batteries and change them as the charge is exhausted. On the other hand, the detachable design somewhat reduces the reliability of the case and makes it more bulky, and manufacturers do not approve of modifications to their devices (including battery replacement) by the user. Thus, this feature in modern laptops is becoming less and less common.

The total weight of the laptop — the device itself, without additional accessories (wires and power supply, mice, bags, etc.). For 2 in 1 models (see "Type"), the weight is indicated when assembled, with a keyboard connected.

Nowadays, models weighing less than 1 kg are found even among fairly large devices — 14 – 15 ", not to mention smaller solutions. Laptops weighing 1 – 1.4 kg are also considered very light, 1.4 – 1.7 kg — light, weight from 1.7 to 2.1 kg(more precisely, even up to 2.5 kg) can be called average, up to 3.5 kg — more than average, and a mass of more than 3.5 kg means that this is an advanced gaming or multimedia laptop designed primarily for power, not portability.

It is also worth remembering that when assessing the weight, the diagonal (size) of the device must also be taken into account. For example, 1.7 kg for a 13" laptop is a lot, and a 17" model can be considered very light if its weight does not reach 2.1 kg.