Comparison Apple iMac 27" 5K 2019 MRQY2 vs Apple iMac 21.5" 4K 2019 MRT42

Diagonal of the screen installed in a monoblock (see "Type").

In general, the larger the diagonal, the more advanced both the screen and the computer as a whole are considered. The large display size is convenient for games, movies, and some special tasks like layout of large printed materials; in addition, a higher resolution can be provided for such a screen, and more space is available inside the case for advanced components. On the other hand, a larger monoblock will cost much more than a relatively small one, even if the other characteristics of such models are completely the same. In addition, the power of the hardware is not directly related to the size of the screen — high-end monoblocks can be quite small.

As for specific numbers, a diagonal of 20" or less is considered very limited nowadays, monoblocks of 21.5" are small, a 24" screen is medium, and values of 27" and 32" indicate large sizes.

Resolution of the screen installed in the monoblock (see "Type").

The higher the resolution, the clearer and more detailed image the screen can produce, but the more expensive it is. In addition, high resolutions require corresponding powerful graphics, which further affects the price of the entire computer. The minimum indicator for modern monoblocks is actually 1366x768 — this resolution allows, in particular, to play HD 720p video in proper quality. However, nowadays, the more advanced format is most widely used — Full HD, providing a resolution of 1920x1080. And in high-end monoblocks with a large diagonal and powerful graphics, there are also more solid resolutions — Quad HD(2560x1440, 3440x1440), Ultra HD 4K(3840x2160, 4096x2304) and even 5K(5120x2880) standards.

The number of slots for RAM modules provided on the PC motherboard. In this case, we are talking about slots for removable strips; for a PC with built-in memory, this parameter is irrelevant.

The slots available on the "motherboard" can be occupied all, partially or not occupied at all (in models without RAM). Anyway, you should pay attention to their number if the initially installed amount of RAM does not suit you (or ceases to suit you over time), and you plan to upgrade the system. The smallest amount found in a PC with removable memory is 1 slot ; if it is busy, you will only have to change the bar when upgrading. More connectors for RAM are always paired, this is due to a number of technical nuances; most often this number is 2 or 4, but it can be large — up to 16 in powerful workstations.

Note that when planning an upgrade, you need to take into account not only the number of slots and type of memory (see above), but also the characteristics of the motherboard. All modern "motherboards" have restrictions on the maximum amount of RAM; as a result, for example, the presence of two DDR4 slots does not mean that two strips of maximum capacity can be installed in the system at once, 128 GB each.

The main manufacturers of video cards nowadays are AMD, NVIDIA and Intel, and each has its own specifics. NVIDIA produces primarily discrete solutions; Among the most common are the GeForce MX1xx, GeForce MX3xx, GeForce GTX 10xx series (in particular GTX 1050, GTX 1050 Ti and GTX 1060), GeForce GTX 16xx, GeForce RTX 20xx, GeForce RTX 30xx( GeForce RTX 3060, GeForce RTX 3060 Ti, GeForce RTX 3070, GeForce RTX 3070 Ti, GeForce RTX 3080, GeForce RTX 3080 Ti, GeForce RTX 3090, GeForce RTX 3090 Ti), GeForce RTX 4060 , GeForce RTX 4060 Ti, GeForce RTX 4070, GeForce RTX 4070 SUPER, GeForce RTX 4070 Ti, GeForce RTX 4070 Ti SUPER, Ge Force RTX 4080, GeForce RTX 4080 SUPER, GeForce RTX 4090 and separate Quadro series. AMD offers both discrete and integrated graphics - including the popular Radeon RX 500, Radeon RX 5000, Radeon RX 6000 and AMD Radeon Pro series. And Intel deals exclusively with modules integrated into processors of its own production - these can be HD Graphics, UHD Graphics and Iris.

Note that many configurations with discrete graphics also have an integrated graphics module; in such cases, the name of the discrete video card is indicated as more advanced.

The result shown by the PC graphics card in the test (benchmark) Passmark G3D Mark.

Passmark G3D Mark is a comprehensive test to check the performance of a graphics card in various modes. Traditionally for such tests results are displayed in points, more points mean (proportionately) higher computing power. However, note that the graphics card is tested in different modes, and the final score is derived based on several results in specialized tests. Therefore, adapters with a similar overall result may differ slightly in actual performance in certain specific formats of operation. So if a PC is purchased for professional work with graphics, and high efficiency in some specialized tasks is critical, it will not hurt to clarify these nuances separately.

Note that with the help of Passmark G3D Mark, nowadays, all types of graphics adapters are tested (see "Graphics card type"). At the same time, for integrated solutions, a result of more than 1200 points is considered very good, and in discrete models this figure can vary from 2200 – 2300 points to 20,000 points or more.

The presence of a keyboard and mouse included with the PC. This configuration eliminates the need to purchase these accessories separately, and the bundled peripherals, by definition, will be optimally compatible with the computer. On the other hand, it is worth considering that the kit usually includes fairly simple keyboards and mice; For a demanding user - for example, an enthusiastic gamer - such equipment may not be advanced enough. Also, input Devices may differ in connection method.

- Wired. Wired keyboards and mice are inexpensive and do not require their own power sources - that is, they provide unlimited operation time, without the need to change batteries or charge the battery. In addition, they are suitable for even the most inexpensive PCs that are not equipped with Bluetooth or Wi-Fi wireless modules. The disadvantages of this option include: firstly, the actual presence of a wire, which limits mobility and which sometimes has to be pulled through hard-to-reach places; secondly, the need to have free ports for connection. At the same time, these shortcomings are not so often critical, so most modern PCs with input Devices are supplied with wired accessories.

- Wireless. Wireless keyboards and mice provide the user with additional convenience: they allow you to move freely within a radius of at least a few meters from the computer, without worrying about how to place the wire the next time you move. On the...other hand, such input Devices are noticeably more expensive than wired ones; their operation requires a power source - batteries or an accumulator, and the operating time from such a source is limited (although it is often measured in weeks or even months). In addition, to use wireless peripherals, the corresponding connection interface (most often Bluetooth) must be supported by the computer itself, which is not the case in every configuration. Therefore, wireless accessories are included in the package much less frequently than wired ones.