While buying cellphones, we often get confused while choosing between the different types of processors manufactured by different brands.
Clock Speed
This is one of the most fundamental aspects to look at in a processor. It refers to the frequency at which one core of the CPU is running and can be used as a benchmark to judge the processor's speed. It is indicated in GigaHertz (GHz).
At this point, we can say; higher the clock speed faster is
the processor. For example, Qualcomm Snapdragon 675 offers a clock speed of
2.0GHz, Kirin 970 by Huawei provides clock speeds up to 2.4GHz, Samsung Exynos
9610 runs at 2.3 GHz and so on.
Number of Cores
Next, we can draw comparisons by checking the number of
cores provided in the CPU. CPUs with multiple cores can run multiple programs
with greater ease. However, all cores are not the same. Often in multi-core processors,
some cores are provided for carrying out a high-performance task, and a few are
energy-efficient cores for running ordinary programs. It is to be noted that most of the applications cannot make use of multiple cores properly. Hence while choosing a processor, one shall
*Cortex-A76 is the successor of Cortex-A75 and Cortex-A73
and has better performance than the latter one.
GPU (Graphics Processing
Unit)
It handles the visual rendering elements of a phone display and decides the gaming performance of a processor. Essential aspects of GPU are its clock speed, maximum display resolution supported by GPU, and the fabrication technology, i.e., the thickness of the chip on which it is fabricated (mentioned in nm).
The most common GPU's used in smartphones is Adreno from
Qualcomm, ARM Mali, and Power VR. Let's take an example of Adreno 612 and
Mali-G72 MP3 GPU. Both have a clock speed of 850MHz. However, the Adreno 612 is
fabricated on 14nm technology compared to the 16nm technology of Mali-G72 MP3.
Hence, Adreno 612 has a slight edge in performance over the latter one.
Modem
This determines the maximum download and upload speeds supported by the processor and is usually mentioned in Mbps. Moreover,
it decides the Wi-fi and Bluetooth connectivity supports. For example, Qualcomm
snapdragon 675 houses the X12 LTE modem, which has a maximum download speed of
600Mbps (Cat 12) and maximum upload speed of 150Mbps (Cat 13). For Wi-Fi, it
supports 802.11ac Wave 2 Wi-Fi standard with a peak speed of 867Mbps. For Bluetooth,
it can support Bluetooth 5.0 technology. We will take a look at another standard
chipset, MediaTek Helio P70. It has a peak download speed of 300Mbps (Cat 7) and an upload speed of 150Mbps (Cat 13). It supports Bluetooth 4.2.
Manufacturing Process
In general, fabrication on a thinner chip provides faster
performance to the CPU. Hence a processor fabricated on an 11nm chip will have the edge over a chip manufactured on a 12nm chip.
Above are the significant parameters based on which you
can decide which CPU to go for while buying smartphones. There are some other
parameters like RAM speed and camera support, which in most cases
can be taken as the higher, the better. And last but not least, the price
matters a lot. Sometimes with a slight compromise in performance, you can get a significant price difference. So, consider all these factors while buying a
smartphone to get a device that can fulfill your requirements.
image source: google.com
