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i3 4010U vs Amlogic S812 ? in terms of Video Decoding 4k2k,H.264,H.265 whos better

someone told me the Amlogic S812 is much better if this the case

The Haswell i3 4010U cannot Hardware decode the H265 codec. CPU Software decoding only. Ultimately with the i3 you are going to run into a software decode bitrate hard limit where the CPU just does not have enough grunt.
This will be particularily true when you start seeing 4K2K H265 files, the AMlogic's GPU should handle these fine. I don't know if anyone has tested this yet tho.

H264 decoding performance will be nearly equal, the i3 using Software decoding will handle problem files better than AMlogic.
I recall Noggin has run into issues with 720/50p H264 files and MPEG2 DVD ISOs. Interlaced ones running on an AMlogic S805 using an unsupported / unofficial release of Kodi 14.2 / OpenElec. Results may be different with Kodi Isengard running on Ubuntu, so I would not read too much into that just yet.
Broadcast TV deinterlacing on AMlogic is excellent as it would also be with an Intel i3.

AMlogic in recent months have been putting a bit of work into fixing HDMI related issues and output refresh rates. They now support all you will need: 23.97, 25, 29.97, 50, 59.94 and 60Hz. This is again testing with Kodi / Ubuntu.

I do know for a fact that when running Kodi on Ubuntu, an AMlogic S805 now supports 23.976fps (24p) H264 output. It is nearly there for perfect 1080p / 24p / H265 sync as well. In brief testing I now see no 24p sync issues when playing 1080p / 23.976fps / H264 files using Ubuntu. Kodi using OpenElec and Android still have H264 / 24p / 41 second video sync issues at 24Hz. All these problems of course disappear when using a 60Hz refresh rate, if you can put up with 3:2 pulldown judder.
The AMlogic S812 should operate similarily. This will all depend on the Firmware being used.

After all that, the Intel i3 will be the best for H264 decoding, particularily if you run an Official version of Kodi / OpenElec. Its a much more mature well supported platform.
The AMlogic S812 should be better for 4K2K / H265 decoding due to its GPU.

Someone will need to test 4K2K / H264 decoding on both platforms to give you and answer for that.

If you were looking at an AMlogic S812, Minix are the guys to go to as all AMlogic bug fixes appear on that platform first.

W.

thanks body really nice info

i dont have 2k or 4k tv in my house , so i will only play 1080 and 3d using my sony tv

so i have two box , the first is asus chromebox with the i3 and inside it only OpenElec , shall i change the decoding from hardwear to softwear from kodi setting?

the 2nd box is Intel NUC NUC5i5RYH with icore5 i installed OpenElec on it too , any recommend setting or shall i leave it by default