Amlogic S922X-B/A311D vs Amlogic S912 – Key features
|Amlogic A311D & S922X-B
|CPU||Quad-core Cortex-A73 @ 2.21 GHz
Dual-core Cortex-A53 @ 1.8 GHz
|Octa-core Cortex-A53 @ 1.51 GHz|
|GPU||Arm Mali-G52MP4 with OpenGL ES 3.1 support||ARM Mali-T820MP3 with OpenGL ES 3.0 support|
|NPU||Yes (5.0 TOPS)||No|
|– 4K 10-bit HEVC decode||Up to 60 fps|
|– 4K VP9 decode||Up to 60 fps|
|– 4K H.264 decode||Up to 30 fps (8-bit only)|
|– Encode||1080p60 H.264/H.265||1080p60 H.264|
|– HDR||Dolby Vision, HDR10, HDR10+, HLG, and PRIME HDR||Dolby Vision, HDR10 and HLG
Amlogic S912 is an octa-core processor so people who do not follow the market, may think it will be faster than Amlogic S922X-B hexa-core processor, but the latter comes with more powerful Cortex-A73 cores and Cortex-A53 both clocked at a higher frequency thanks to a 12nm manufacturing processor. The GPU is also more modern with OpenGL ES 3.1 support.
Amlogic S912 was launched at a time when nobody had ever heard of NPU (Neural Processing Unit) in Arm SoCs. Multimedia features are similar, but Amlogic A311D/S922X-B does have support for H.265 encoding, and more HDR (High Dynamic Range) options.
Amlogic S922X-B vs Amlogic S912 – Benchmarks
|Amlogic A311D/S922-X||Amlogic S912
|Overall exc. OpenGL 3.1 “Refinery” (1)||114,335||51,640||2.21x|
|GPU exc. OpenGL 3.1 “Refinery” (1)||18,253||4,902||3.72x|
|Web Browsing 2.0||6,450||3,286||1.96x|
|Photo Editing 2.0||7,164||4,814||1.49x|
|3DMark – Sling Shot (OpenGL ES 3.0)
(1) Refinery does not run on Khadas VIM2 / Amlogic S912 since OpenGL ES 3.1 is not supported, and as such the score was 0, while Khadas VIM3 got 17,220 points in the same test. This distorts the results, so I’ve also presented results without Refinery, which give a more realistic view of the performance difference.
Amlogic A311D is way faster than Amlogic S912, about doubling the CPU performance, web browsing scores and so on. I can remember I was disappointed when Amlogic S912 with Mali-T820MP3 was not that much faster compared to Amlogic S905 with Mali-450MP3 GPU in games and benchmarks. But in their latest SoCs, Amlogic did not mess around, provided a proper upgrade with Mali-G52MP4 GPU providing 3 to 4 times 3D graphics performance, and making it suitable as a gaming platform.
So if you have an old Amlogic S912 SBC or TV box and wonder if it’s worth upgrading to Amlogic S922X-B or A311D, don’t hesitate anymore, unless all you do is watching videos in which case the experience should be similar. Amlogic S922X will also provide a significant upgrade over S912, but just a little slower compared to A311D due to the 1.8 GHz maximum CPU frequency.