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CES2013 On January 7, NVIDIA launched its first quad core A15 processor, Tegra4. On January 8, Qualcomm launched the new Snapdragon 800 quad core processor. On January 9, Lenovo and Intel launched the dual core X86 mobile phone K900 。 On January 10, Samsung released the new eight core mobile processor Exynos 5 Octa, which also indicates that the "core war" of mobile processors will be more intense.

Samsung's Exynos 5 Octa uses a hybrid structure of quad core Cortex-A15 and quad core Cortex-A7, namely "4+4", which also conforms to ARM's big LITTLE architecture. Exynos 5 Octa uses the 28nm process, which is more advanced than the 32nm process of Exynos 5250. In addition, the main frequency of Exynos 5 Octa's quad core A15 is 1.8GHz, and that of the quad core A7 is 1.2GHz. We are relatively familiar with A15 architecture, and its powerful performance is also Nexus 10 As I have learned, the Nexus 10 uses the Exynos 5250 processor with dual core A15 architecture. This time, Samsung Exynos 5 Octa uses a quad core A15 chip, with a main frequency of 1.8GHz, which will greatly improve its performance. As for the performance of the other four core Cortex-A7 Onda V812 Quad Core Evaluation It was also mentioned in. The quad core A7 is completely enough for daily use.

The reason why Samsung Exynos 5 Octa wants to combine the cores of A15 and A7 architectures, Because the power consumption of A15 itself is too high If we really want to load the quad core A15 directly into the mobile phone, we believe that the endurance of the mobile phone will be a big problem. And big The concept of LITTLE is to make A15 and A7 work together in the form of appropriate "job allocation". The eight cores will not work at the same time. When high performance load is required, the most powerful A15 architecture processor will be used. The A7 architecture processor handles most of the daily operations of the device, which is different from the "eight cores" that ordinary users imagine working at the same time. This approach is to give full play to the strong performance of A15 and the super high energy consumption ratio of A7. Although it is a compromise to some extent, it is also a highly practical design.

And big The potential problem of LITTLE is the switching between A15 and A7 processors In the LITTLE system, the A15 and A7 processors are implemented through the system IP. At the same time, ARM also uses CoreLink CCI-400 to achieve the consistency of processing direct cache. However, whether there is delay in the handover between A15 and A7 is also a problem. In addition, in dealing with most daily applications, it is still unknown whether the A7 processor will bring a lower performance than the current mainstream quad core A9 processor.

As for the GPU, Samsung has not announced the GPU model matched with Exynos 5 Octa, and only claims that its graphics performance will be twice that of the previous generation. And does this "previous generation" product refer to Exynos 4412 or Exynos 5250? If it is twice of the former, although the performance is not so powerful, I believe that 1080P resolution is enough. If it is twice as powerful as the latter, the graphics performance of Exynos 5 Octa will be more powerful than ever before, even if it surpasses the SGX554MP4, which is now the strongest. This is Exynos 5 Octa's 17 ▼

Just before the appearance of Exynos 5 Octa, Huawei announced that it would launch the K3V3 chip with A15 architecture in the second half of the year. The SoC competition in the next era will become more and more fierce. The 2013 high-end market composed of Exynos 5 Octa, Tegra4, Snapdragon 800, Clover Trail and K3V3 will be fierce.

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