Android phones start with 2GB of memory, and high-end or top models will be equipped with 3GB or even 4GB of memory, but most of them are LPDDR3 instead of the latest LPDDR4. The manufacturer only mentions the DARM capacity and not the standard, which means that it is a selling point in manufacturing and marketing like multi-core processors. In theory, the larger the memory capacity, the better, but can it really beat the iPhone in terms of experience?
Vivo held a new product launch conference at the Water Cube, and launched the all-metal phone X6 and X6 Plus, with the main focus on "fast enough to be refreshed". However, the manufacturer did not mention the specific model of the processor during the entire conference, but only indicated the 8-core 64-bit. From the information leaked by AnTuTu, the vivo X6/X6 Plus is equipped with MediaTek MT6752 (dual 4G version) or Snapdragon 615 (full Netcom version). The processor is still at the level of last year's thousand yuan machine, which is not enough to see. !
4GB memory standard: LPDDR3 or LPDDR4?
It seems that the "fast" mentioned by vivo should refer to the speedup brought by 4GB RAM. According to the official statement, 4GB of running memory can run more apps at the same time, and it can also bring faster program startup speed, which has obvious advantages compared with the opening speed of 3GB or 2GB of running memory. Is this really the case? Why does the iPhone 6s with 2GB of RAM feel better?
In addition to the different memory management mechanisms adopted by iOS and Android, mobile phone memory specifications are also an important factor affecting startup and operating speed. The memory specifications mentioned here include frequency and bandwidth in addition to capacity. For details, please refer to the standards published by the JEDEC Solid State Technology Association.
At present, the latest standard for mobile phone memory is LPDDR4, but only high-end processors such as Snapdragon 810, Samsung Exynos 7420 and Apple A9 are supported. Most mobile phones use LPDDR3 memory, including ASUS ZenFone2 which debuted at the beginning of the year and the recently released vivo. X6.
LPDDR4 memory performance: double the bandwidth and reduce power consumption by 30%
The highest frequency of the previous generation of LPDDR3 is 2133MHz, while LPDDR4 starts directly from 3200MHz, and can even reach 4266MHz; the architecture of LPDDR4 has also been redesigned, from single channel 16bit per die to dual channel 16bit (total 32bit); the voltage is from above The 1.2V of the first generation dropped to 1.1V. Simply put, the bandwidth is twice that of the previous generation, and the power consumption is reduced by 30%.
What is the concept of doubling bandwidth? Take the latest console as an example. Both PS4 and Xbox One use 8GB of memory, but the former is 5500MHz GDDR5 and the latter is 2133MH DDR3. The result is that Xbox One can only run most games at 720p/900p resolution, while PS4 can achieve 1080p, and the game performance is stronger. The mobile phone uses LPDDR4 memory, which is equivalent to the host or PC entering the GDDR5 era from DDR3.
LPDDR4 memory status: high cost and low processor support
Since LPDDR4 is faster and consumes less power, why is it not popular? You know that at the end of last year, Samsung mass-produced 8Gb (1Byte=8bit, equivalent to 1GB) LPDDR4-3200 memory particles. The process technology is 20nm. Its own Galaxy S6/Edge has been used. Another SK Hynix also announced in February this year that its 8Gb LPDDR4 memory was used by mobile phones (probably LG G Flex2). LDDR4 memory has been officially commercialized for almost a year, but only a few flagship models are equipped, which is a bit unscientific!
In fact, in addition to the relatively small number of processor models supported (the Snapdragon 810 also exposes heat issues), cost is the biggest constraint. At present, DRAM chip manufacturers are mainly Samsung (45.1%), SK Hynix (27.7%), and Micron. Whether it is LPDDR memory used in mobile phones and tablets, or DDR memory used in PCs, China basically depends on imports. The use of LPDDR4 memory has to bear the risks and costs brought by the 20nm process, and the cost will be more expensive.
Compared with the use of new technologies, domestic manufacturers are more willing to increase the capacity of LPDDR3 memory, let alone how much improvement in user experience, marketing can add a selling point, the cost is not high. After all, users like large memory, and multi-core processors are the same, whether useful or not. Don’t you see? At the new product launches of vivo X6 and Huawei Mate 8, the manufacturer only emphasized 4GB of running memory, but did not specify whether it was LPDDR3 or LPDDR4.
Mobile phone RAM trend: more than 6GB memory will hit next year
Android phones start with 2GB memory, and high-end and top models will only be equipped with 3GB/4GB memory, but most of them are LPDDR3, not the latest LPDDR4, which shows that the cost is still under pressure. However, according to industry insiders, after processors (run points), manufacturers have to fight for memory, and mobile phone memory may reach 6-8GB in the next year. Samsung has also completed the mass production of 12Gb LPDDR4 memory particles, four groups can reach 6GB, it is likely to be used on Galaxy S7 or Note 6. Looking back at the PC, I still seem to be squeezing toothpaste.
In fact, with the update of the Android version, the efficiency of memory management after 5.1 has been improved a lot compared to before. Unfortunately, there are too many rogue apps in China, and they are grouped into battle (such as a family bucket). Seeing that they are about to be killed, their teammates immediately gave milk... It’s no wonder that even with a mobile phone with 3GB RAM or more, many users still do Clean memory frequently (obsessive-compulsive disorder). I can only hope that after Google returns next year, the situation will improve, otherwise 6GB or 8GB will not be enough.
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