After seeing benchmarks comparisons between Amlogic S905 and S805, as well as Amlogic S905 vs Rockchip RK3368, several people asked me to compare the older Amlogic S812 32-bit processor to the newer Amlogic S905 64-bit processor, so I’ve gone ahead and compared the results for several benchmarks obtained with WeTek Core and K1 Plus Android 5.1 TV boxes, respectively powered by Amlogic S812 and Amlogic S905.
A ratio greater than one means Amlogic S812 is the fastest, and I’ve highlighted the ratio with red or green colors so that red color is a plus for S905, and green color means S812 achieved a better result.
|Amlogic S905||Amlogic S812||Ratio|
|CPU||Quad core Cortex A53 @ 2.02 GHz||Quad core Cortex A9 @ 1.99 GHz|
|GPU||Penta-core ARM Mali-450MP||Octa-core ARM Mali-450MP|
|CPU Integer (multi-thread)||2,310||2,393||1.04|
|CPU float-point (multi-thread)||2,483||2,687||1.08|
|CPU Integer (single thread)||1,587||1,735||1.09|
|CPU float-point (single thread)||1,510||1,483||0.98|
|3D Graphics (1920×1080)||6,126||10,942||1.79|
|3DMark – Ice Storm Extreme v1.2|
The benchmarks basically match the theory that says Cortex A9 is slightly faster than Cortex A53 for integer performance, at a given CPU frequency, but overall the results are unlikely to be noticeable to the end user, except when it comes to 3D graphics where the octa-core GPU is faster then the penta-core core one, by 34% based on 3DMark, and 79% based on Antutu’s 3D graphics benchmark. For some reasons, 2D graphics appears to be significantly faster on Amlogic S905.
The main advantage of Amlogic S905 over S812 is support for HDMI 2.0 ports allowing 2160p @ 60 Hz video output, and 4K H.265 hardware video decoding up to 60 fps, while both are limited to 30 Hz on S812. Also bear in mind than most Amlogic S812 / S802 devices currently on the market are running Android 4.4, and will not perform quite as fast as Android 5.1 devices such as WeTek Core.