Como curiosidad un usuario de los foros de XBMC que tiene una Asus J1800 (generación anterior, dual core, 2.41 Ghz) comenta lo que le funciona y lo que no:

My tests with Asus J1800:

What works fine:
- 1080p60, 1080p50, 3840x1800, 1080p24 (the first two only without swfilter, 50p or 60p are too much for the baytrail when running this SSE4.2 code) -> swfilter not available in xbmc mainline
- Dts-hd, truehd, lpcm 7.1
- 1080i50 with SWfilter + Bob Deinterlacer
- 576i50 with SWFilter + Yadif Deinterlacer
- H265 in Software (big bug bunny runs with both cores at max) -> not available in xbmc mainline.

What does not work:
- 1080i50 with SWFilter + Yadif Deinterlacer -> too slow max 36fps
- Every upscaling algorithm other than Bilinear is too much for that GPU. This sucks completely. They chose a HD4000 gpu and only shipped 1/4th of the EUs.

The 2x 2.41 ghz are quite fast - I like the speed of xbmc menus.

I think you can plain forget it for gaming, cause of the GPU. The only good in it is the VAAPI decoder.