Amlogic S912 vs Amlogic A311D/S922X-B Benchmarks Comparison

A few days ago we compared Amlogic A311D to Rockchip RK3399 since both the top of the line processors from Amlogic and Rockchip that are currently available. Rockchip RK3588 will even be faster, but we need to wait until Q1 2020 at least before it becomes available, and delays are not unheard of, so I’d expect it may take about one year before I can get my hands on a sample.

Another comparison is against Amlogic S912, the previous high-end processor from the company. Amlogic A311D and S922X-B are newer and will be faster but it’s interesting to find out just how much. Note the Amlogic S922X found in ODROID-N2 is clocked at a lower speed compare to A311D/S922X-B, so performance will be somewhat lower. Since I recently benchmarked Khadas VIM3 with Amlogic A311D processor, I decided to dust off my old Khadas VIM2 Amlogic S912 development board, fit it a large heatsink, install the latest Android 7.1 firmware for the board, and run the benchmarks again. You’ll find screenshots of result at the end of this post.
S922X-B vs S912

Amlogic S922X-B/A311D vs Amlogic S912 – Key features

Amlogic A311D & S922X-B
Amlogic S912
CPUQuad-core Cortex-A73 @ 2.21 GHz
Dual-core Cortex-A53 @ 1.8 GHz
Octa-core Cortex-A53 @ 1.51 GHz
GPUArm Mali-G52MP4 with OpenGL ES 3.1 supportARM Mali-T820MP3 with OpenGL ES 3.0 support
NPUYes (5.0 TOPS)No
– 4K 10-bit HEVC decodeUp to 60 fps
– 4K VP9 decodeUp to 60 fps
– 4K H.264 decodeUp to 30 fps (8-bit only)
– Encode1080p60 H.264/H.2651080p60 H.264
– HDRDolby Vision, HDR10, HDR10+, HLG, and PRIME HDRDolby 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-XAmlogic S912
Antutu 7.x
Overall exc. OpenGL 3.1 “Refinery” (1)114,33551,6402.21x
GPU exc. OpenGL 3.1 “Refinery” (1)18,2534,9023.72x
PCMark 10
Web Browsing 2.06,4503,2861.96x
Video Editing5,2984,0891.30x
Writing 2.05,7132,3832.40x
Photo Editing 2.07,1644,8141.49x
Data Manipulation5,4352,5252.15x
3DMark – Sling Shot (OpenGL ES 3.0)
Total score 1,6594733.51x
Graphics score1,5584073.83x
Physics score2,1431,0931.96x

(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.

Addenum – Khadas VIM2 / Amlogic S912 Benchmark Data (Android 8.0, August 2019)


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Antutu 7.2.2

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PCMark 10 Work 2.0 performance
Amlogic S912 SBC PCMark 10 Work 2.0

3DMark Sling Shot OpenGL ES 3.0 Benchmark

Amlogic S912 3DMark Sling Shot
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