there good construction and quality exoskeleton and contrast of the screen and the battery capacity and other factors that will not talk it now. first advice is that most incredible performance testing benchmarks especially those that do not measure real business, for example, many of which are arithmetic operations inside the repeat loop and that the accounts will not change you measure the performance of the Cache and not the processor. Some reliable performance tests measure the real process, such as the time required to compress the Linux source code format gz or to convert an audio file from wav to mp3 format or number of frames per second in a real game ... and so on.Second thing we need to take into account that the devices table Embedded Devices does not contain motherboard general purpose placed under additional plates, but there is a complete system on a single chip System on Chip or SoC short in the sense that you have to be happy quantity Ram from the outset because you will not add more of them , as well as support for bluetooth or NFC, etc.Finally, there are factors related to the final product and not its components, for example, some products are discounted under clocked speed because the battery can not provide the energy needed for full speed or that the cover can not provide the necessary cooling, etc..
The number of nuclei and the processor clock speed:Some people consider the clock speed clock speed is the speed of the processor and this not be accurate only in the processors of the same structure and the same type, for example, you can not judge a comparison between the Pentium 4 processor speeds 6 GHz and last i3 quickly 2Ghz. , Was of the same architecture then you can compare the number of nuclei cores and clock speed.If we had therapists from the same family, one speeds of 1 GHz and the other speeds of 2 GHz, it means that the performance of the second gay first performance. If we had therapists from the same family, but first single nucleus and the other dual-core, the performance of the second theory can be up to twice the first but in practice will not be achieved this because it requires that the code be implemented parallel, not sequential (ie not interdependent).The more nuclei increased smoother device when implementing things in parallel, for example Imagine yourself browsing the Internet and software works in the background to synchronize mail and other work hotspot and the fourth running FM radio or audio MP3 in the background because if it was a single nucleus must be every process through slide time allocated to them Otherwise I felt what has been called the lag.
Processor architecture:Even know the processors in the world of table devices embedded devices, most of them are RISC architecture and specifically ARMv7 architecture in the world of smart phones and tablet computers and MIPS architecture in many devices such as smart grid exchanges network switches and PowerPC processors may find in some printers.ARM does not make ARM processors do not sell, but is dedicated to the design only and profiting from the sale of licenses those designs. Based ARM processors on the principle of RISC any kit instructions shorthand They contain a minimum of instructions that allow you to do any task and thus shorthand reduce complexity and energy consumption and reduce the cost and the number of transistors (for example, that more ARM processors modern and sophisticated no more than 35 thousand transistors) Unlike CISC complex, such as those from Intel that contain several million transistors.Most Ondreod devices in the market based on the kit instructions ARMv7 but you can find some of them on ARMv6 such as Samsung Galaxy Y. You can imagine that the price of a license ARMv6 design will be symbolic when you see the ARMv7 which will remain high until the emergence of the next generation. Each new generation of the ARM family adds more energy saving and more performance (even at the same clock frequency).Family includes instructions ARMv7 number of processors Ochehrhma Cortex-A9 and Cortex-A15 and the latter is faster than 40% A9 at the same frequency and the number of nuclei.The image below shows that computer Samsung ChromeBook chip Exynos 5 Dual SoC Tnaúahalnoah overcome processor Tegra 3 quad-core and both of the family of instructions ARMv7 mention beating atom (processor portable devices and table from Intel) but almost up to the performance of i3 (a processor designed your performance desktop computers, not to save energy) and the reason here is that it's an architectural Cortex A15. (In the following image line Luxor mean better performance):
This technique is useful because, as we note in the previous picture (taken from a Samsung Galaxy SL i9003 through the CPU Spy) requires processor most of the time to sob in a deep sleep and the second place you find those employed 300 MHz with that supports higher frequencies but it does not need to carry out operations traditional.Snapdragon processors are one of the strongest and fastest processors, for example, Snapdragon 800 MSM8974 It contains Krait 400 processor speeds up to 2.3 GHz engadget site says that the application processor S4 than the Tegra 3 in all the tests.The intensity of competition frenetic drove company Texas Instruments American ancient of competition where they announced that the intensity of the competition made them stop chip OMAP before the OMAP 5 with the OMAP 4 of the most successful processors is used in a number of cellular devices Motorola and a Samsung Galaxy S i9003 and even a number of boards amateur like beagel board and Panda boardThere are 3 distinct from Chinese companies that have managed to put themselves a foothold in this hectic competition, namely:
- Allwinner such as quad-core processor A31 family of ARM Cortex-A7
- RockChip like rk3066 dual-core processor family ARM Cortex-A9 and rk3166 quad-core processor from the same family.
- Amlogic, which are often family ARM Cortex-A9
Recently company Ingenic Chinese development processors MIPS even reached out to the level it can be carried on Tablet PCs and through processor family applications XBrust like JZ4770 where the company says it may speed up to 1.2 GHz to 1.2 volts consuming less 90 mW (ms - W) The company hopes to be able in 2014 to move to 20 nm technology and increase the number of nuclei and be 64 - bit, etc. These achievements before it was just not exceeding planted processors 100 or 300 MHz. And, of course, do not compare this with ARM processors, which reminded us that reached to 8 cores of CPU processors in a single chip.
Type and graphics processing unit GPU:The graphics processing unit GPU inside the chip is similar in function display card in the world of personal computers, but the difference is that you can not change it. This unit is the bottleneck for gaming performance and effects movement apparatus fast CPU processor will end whatever speed unless have a GPU appropriate.If processor GPU strong and contains instructions fast but its share of the market are few and last less powerful but has a large market share and relationships with manufacturers games make them test their programs on this processor without that then you might get fast performance on the CPU power and speed while it might not work the game never strong on the processor.In the world of systems-on-chip SoC There are certain advantages exist Ready for example HDMI be taking Age such and such a number of chip and connected directly to such and such an age of director without any mediation. But sometimes there is a choice of factory final not to connect from the ground up, for example Google did not work HDMI output did not work entrance micro sd in Computer Nexus 7 while the Acer A110 uses the same chip is Tegra 3, but contain HDMI output and the entrance micro SD (The reason is obvious because Google wants us to consume the content of the store).Well, you have to take into account the ways media codec chip backed Atadaa in itself it affects media playback speed and power consumption can be seen by looking at the word HW in the video player MX Player.
Example, I run a full HD video file type mp4 on a tablet device modest chip rk2918 When he can not run smoothly device Samsung galaxy SL (because it uses software to decode the video not be able to accomplish this in a timely manner).
The most important species and the problem of harmonic:Most types of GPU is designed ARM a Mali-400 and found in many of the chip and allow multiple nuclei are the most consensual at all because they are firm ARM and it is easy for companies to buy its license and months devices that contain Samsung S2 and S3 as they exist in the number of
Powerful GPU processors found in many common devices iPhone and Samsung SL i9003 and Samsung S i9000 and Samsung Galaxy Nexus is designed PowerVR specifically model SGX and because many of the games started on the iPhone before Android the PowerVR compatibility with high games. However, it is worthwhile to point out that Samsung recently focused on Mali, as in S2 and S3, and others.There processor ULP GeForce of nvidia-known and prestigious in this area is located in the chips Tegra and you سأشك in consensual games with him not for that announcement Google for use Tegra 3 in Nexus 7 ensure his experience on a lot of games and verified this chip is not exclusive to Nexus7 but found in many of tablet devices. And there are games designed for this processor without the other.As we mentioned nVidia it we have to mention that ATI نعرج Adreno processor, which was known as the ATI Imageon, which later sold to Qualcomm and become part of Snapdragon chips produced by a special processors.The well-researched may find Vivante GC860 processor chip in some such rockchip rk2918 (from the world of ARM) and Ingenic JZ4770 (from the world of MIPS), but you may encounter many problems in compatibility with this processor as there is no device carries famous.There is a program called Chainfire3D acts as an intermediary receives instructions fit a particular processor (like Tegra) and converts it to the instructions of the suit therapist but disadvantages that it works on the android 2.x systems only and requires root root powers.
Screen resolution impact on performance:Even compare the two different types must take into account the screen resolution Valmaalj modest in the Samsung Galaxy Y can run a lot of games smoothly, not because of strength but because the screen resolution is 320 x 240 what is required of it when each frame is displayed address such a small quantity of points.While Samsung Nexus 10 needs resolution 2560 x 1600 pixel processing astronomical number of points over 50 times Galaxy Y no more than 5,000% of the number of points in it. Even if we compare modern device such as Nexus 7 with 1280 x 800 pixel still Nexus 10 is 4 times the number of points (in other words needs graphics processor in the Nexus 10 to be 4 times faster than that in the Nexus 7 even gives the same performance)
Graphics processor clock speed:There are a lot of tablet devices cheap contain GPU strong type Mali 400 but it works hesitantly very low like Amlogic AML872 that contains Mali 400 fast 250 MHz in contrast, chip Allwinner A10 contains the same processor GPU but quickly 300 MHz and can handle media HD even 2160P. In contrast, processor GPU GC860 RK2819 speeds of 600 MHz processor and because GPU in mononuclear three examples the speed is very important and directly affect performance.
Number of graphics processor cores:Sharp contrast to the CPU processors, the nature of work GPU graphics processors fit multiple nuclei more because a lot of graphical tasks can be performed in parallel, so the increase in the number of nuclei directly reflected on the graphical performance (which means you can handle twice the number of frames FPS or twice the display resolution when doubling the number of nuclei). Indeed, a lot of graphical issues can be classified as SIMD (execute one instruction multiple data).For example Exynos 4210 chip in your Galaxy Tab 7.7 contains GPU Mali 400MP4 species and MP4 here means quad-core processors operate at a frequency of 266 MHz only but it is certainly much faster than any single-core chip but twice the speed.Add to raise the performance of multiple nuclei can help to save energy when you do not need them where they can simply run fewer nuclei.The most popular chips in many rely on multiple nuclei are Tegra 3 It contains 12 core GPU graphics processor operates at a frequency of more than 400 MHz.Increase the number of nuclei above a certain threshold may become worthless example chip Exynos 5250 in Samsung Nexus 10 contains a GPU-type Mali-T604 contains 4 nuclei graphical only (faster than the 500 MHz) can defeat any processor another graphic and ensure accurate astronomical screen that device .
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