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Comparison Apple iMac 27" 5K 2017 MNE92 vs Apple iMac 27" 5K 2015 MK472

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Apple iMac 27" 5K 2017 (MNE92)
Apple iMac 27" 5K 2015 (MK472)
Apple iMac 27" 5K 2017 MNE92Apple iMac 27" 5K 2015 MK472
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from $1,850.00 up to $2,907.96
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Product typemonoblockmonoblock
Screen
Screen size27 "27 "
Resolution
5120x2880 (16:9) px /Retina 5K/
5120x2880 (16:9) px
Panel typeIPSIPS
Surface treatmentglossgloss
Brightness500 cd/m2420 cd/m2
Contrast740
CPU
Typedesktopdesktop
SeriesCore i5Core i5
Model75006500
Cores44
Threads4
Speed3.4 GHz3.2 GHz
TurboBoost / TurboCore3.8 GHz3.6 GHz
Passmark CPU Mark5627 score(s)
Geekbench 419078 score(s)
Cinebench R15542 score(s)
Memory
RAM8 GB8 GB
Memory typeDDR4DDR3
Speed2400 MHz1867 MHz
Number of slots44
Graphics card
Graphics card typededicated
dedicated /+Intel Iris Pro Graphics 6200/
Graphics card modelRadeon Pro 570Radeon R9 390
Graphics memory4 GB2 GB
Memory typeGDDR5GDDR5
Passmark G3D Mark6336 score(s)
Storage
Drive typeHDD+Fusion DriveHDD+Fusion Drive
Drive capacity1000 GB1000 GB
Rotational latency7200 rpm
Back panel
Connectors
 
miniDisplayPort
USB 3.2 gen144
USB C 3.2 gen22
Thunderboltv3 2 pcsv2 2 pcs
Front Panel
Optical driveis absentis absent
Card reader
 /SDXC/
Multimedia
LAN (RJ-45)1 Gbps1 Gbps
Wi-FiWi-Fi 5 (802.11aс)Wi-Fi 5 (802.11aс)
Bluetooth
 /v 4.2/
 /v 4.0/
Sound2.02.0
Speakers
Built-in microphone
Webcam
 /FaceTime HD camera/
 /FaceTime HD camera/
Kensington / Noble lock
General
Preinstalled OS
MacOS /Sierra/
MacOS
Material
aluminium /anodized/
aluminium
Dimensions (HxWxD)516x650x203 mm516x650x203 mm
Weight9.44 kg9.54 kg
Color
Added to E-Catalogjune 2017october 2015

Brightness

The maximum brightness provided by the monoblock screen (see "Type").

The more intense the ambient light, the higher the screen brightness should be for normal visibility. The most "dim" screens in monoblocks are capable of delivering up to 200 cd / m2 — this is more than enough to work under ordinary artificial lighting, but under sunlight it will take at least 300 cd / m2. At the same time, modern monoblocks can also have a larger margin of brightness — in some models up to 500 cd / m2. This expands the possibilities for customizing the screen for different situations and user preferences. In addition, high brightness has a positive effect on image quality and colour saturation, in light of which it is often a sign of a fairly advanced screen.

Contrast

Monoblock native screen contrast (see "Type"). This indicator describes the ratio between the brightest white and the darkest black that the screen is capable of displaying. And the higher this ratio, the higher the quality of the picture, the more reliable the colour reproduction and the better the details in the lightest and darkest areas of the image are visible.

It is worth noting that the real contrast even in professional matrices almost never exceeds 5000:1, however, much higher figures can be given in the characteristics — at the level of 100000000:1 (one hundred million to one), even in relatively inexpensive screens. This means that the manufacturer went to the trick and indicated in the characteristics not static (real), but the so-called dynamic contrast. It describes the difference between the brightest white at maximum brightness and the darkest at minimum; it is unrealistic to achieve such indicators within one frame, so this is more advertising than practically significant information. At the same time, we note that there are "smart" backlight technologies that allow you to change its brightness in certain areas of the screen and achieve a higher contrast in one frame than the claimed static one; these technologies can be used in premium devices.

Model

The specific model of the processor installed in the PC, or rather, its index within its series (see "Processor"). The full model name consists of the series name and this index — for example, Intel Core i3 3220; knowing this name, you can find detailed information about the processor (characteristics, reviews, etc.) and determine how suitable it is for your purposes.

Threads

The number of threads supported by the bundled PC processor.

A thread in this case is a sequence of instructions executed by the kernel. Initially, each individual core is able to work with only one such sequence. However, among modern CPUs, more and more often there are models in which the number of threads is twice the number of cores. This means that the processor uses multi-threading technology, and each core works with two instruction sequences: when pauses occur in one thread, the core switches to another, and vice versa. This allows you to significantly increase performance without increasing the clock frequency and heat dissipation, however, such CPUs are also more expensive than single-threaded counterparts.

Speed

Clock speed of the CPU installed in the PC.

In theory, higher clock speeds have a positive effect on performance because they allow the CPU to perform more operations per unit of time. However, this indicator is rather weakly related to real productivity. The fact is that the actual capabilities of the CPU strongly depend on a number of other factors - the overall architecture, cache size, number of cores, support for special instructions, etc. As a result, you can compare by this indicator only chips from the same or similar series (see “CPU”), and ideally, also from the same generation. And that's pretty approximate.

TurboBoost / TurboCore

Processor clock speed when running in TurboBoost or TurboCore mode.

Turbo Boost technology is used in Intel processors, Turbo Core — AMD. The essence of this technology is the same both there and there: if some of the cores work under high load, and some are idle, then some tasks are transferred from more loaded cores to less loaded ones, which improves performance. This usually increases the clock frequency of the processor; this value is indicated in this paragraph. See above for more information on clock speed in general.

Passmark CPU Mark

The result shown by the PC processor in the test (benchmark) Passmark CPU Mark.

Passmark CPU Mark is a comprehensive test that allows you to evaluate CPU performance in various modes and with a different number of processed threads. The results are displayed in points; the more points, the higher the overall performance of the processor. For comparison: as of 2020, in low-cost solutions, the results are measured in hundreds of points, in mid-range models they range from 800 – 900 to more than 6,000 points, and individual top-end chips are capable of showing 40,000 points or more.

Geekbench 4

The result shown by the PC processor in the test (benchmark) Geekbench 4.

Geekbench 4 is a comprehensive cross-platform test that allows, among other things, to determine the efficiency of the processor in various modes. At the same time, according to the developers, the verification modes are as close as possible to various real tasks that the processor has to solve. The result is indicated in points: the more points — the more powerful the CPU, while the difference in numbers corresponds to the actual difference in performance ("twice the result — twice the power").

Note that the benchmark in Geekbench 4 is the Intel Core i7-6600U processor with a clock frequency of 2.6 GHz. Its power is estimated at 4000 points, and the performance of other tested CPUs is already compared with it.

Cinebench R15

The result shown by the PC processor in the test (benchmark) Cinebench R15.

Cinebench is a test designed to test the capabilities of the processor and graphics card. The creator of this benchmark, Maxon, is also known as the developer of the Cinema 4D 3D editor; this determined the features of testing. So, in addition to purely mathematical tasks, when using Cinebench R15, the processor is loaded with processing high-quality three-dimensional graphics. Another interesting feature is the extensive support for multithreading — the test allows you to fully check the power of chips that process up to 256 threads at a time.

Traditionally, for CPU benchmarks, the test results are indicated in points (more precisely, points — PTS). The more points scored by the CPU, the higher its performance.
Apple iMac 27" 5K 2017 often compared
Apple iMac 27" 5K 2015 often compared