The differences between Amlogic S905X3 and Amlogic S905X2

Posted in Aug 3, 2019 in News, no comment

Amlogic has unveiled the latest processor-Amlogic S905X3 that is described as an advanced application processor designed for high-end 4K OTT/IPTV Set-top boxes. So compared with Amlogic S905X2, what are the differences between them?

Let’s see the specifications of these two popular 4K Android TV box chipsets first:

SOC Amlogic S905X2 S905X3
CPU 4* Cortex-A53 2GHz
(18400 DMIPS)
4* Cortex-A55 2GHz
Neural Network Accelerator NONE Optional
Supports all major deep
learning frameworks including
TensorFlow and Caffe
GPU Mali-G31 mp2 , OpenGL ES 3.2 Vulkan 1.0 and OpenCL 2.0
Always-on MCU Cortex-M3 & Cortex-M4 Cortex-M3 & Cortex-M4
(Optional )
DDR DDR3-2133 /DDR3L-2133 /
DDR4-2666 /LPDDR3-2133 /LPDDR4-3200 SDRAM up to 4G
DDR3-2133 /DDR3L-2133 /
DDR4-3200 /LPDDR3-2133 /
LPDDR4-3200 SDRAM up to 4G

Amlogic S905X2 and S905X3 are somewhat similar to each other regarding overall performance. Both are capable of reaching up to 2GHz and the manufacturing process is only 12nm, but unlike Amlogic S905X2, Amlogic S905X3 features four Arm Cortex-A55 cores. Cortex A55 has 15% to 20% performance improvement and simultaneously lower power consumption than Cortex A53.

This means that you’ll see better performance on an Amlogic S905X3 powered 4K Android TV box, including the shorter loading time of application, smoother UI and more.

Memory Storage
In terms of memory & storage interface, they are compatible with JEDEC standard DDR3-2133 / DDR3L-2133 /LPDDR3-2133 / LPDDR4-3200 SDRAM. The difference is that S905X3’s memory interface has improved with the new SoCs supporting DDR4 up to 3200 MHz. As we know, Amlogic S905X3 features Cortex-A55 cores as well to deliver up to twice the performance compared to Cortex-A53 in memory benchmarks.

Video Playback
In the video playback section, Amlogic S905X2 and S905X3 support full 4K decoding. Exactly, equipped with an up-to-date HDMI 2.1 interface, both of them can decode Ultra HD 4K video content at up to 75 frames per second for H.265, AVS2, and VP9, providing a fast way to send video and audio output. Additionally, Amlogic S905X3 also adds an AI processor that is used for voice recognition in TV Boxes. Overall, there hasn’t a big difference between S905X2 and S905X3 except for the last one with cortex-A55 CPU and AI processor. Therefore, the cost of S905X3 will be higher than S905X2.

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