[Riffmaker]

I can't find the info about the crystal hd add-on for hi-def. Where did you see that? I think 1GB would be sufficient on Linux. If it was Windows, I would think you need more though.

http://www.veubox.com/powerful-media-center/

somewhere in the long and detailed description it says
24FPS 1080p playback (1920×1080@24Hz) and 25FPS 1080p playback 1920×1080@50Hz *6

The *6 is a footnote at the bottom of the page that reads "6. Requires optional CrystalHD decoder"

A Sempron 140 is a single core cpu and there's no way its powerful enough to play back 1080p on its own.

[hereandthere]

http://www.veubox.com/powerful-media-center/

somewhere in the long and detailed description it says
24FPS 1080p playback (1920×1080@24Hz) and 25FPS 1080p playback 1920×1080@50Hz *6

The *6 is a footnote at the bottom of the page that reads "6. Requires optional CrystalHD decoder"

A Sempron 140 is a single core cpu and there's no way its powerful enough to play back 1080p on its own.

Oh, I missed that. My experience with 1080p is that the bitrate is the main factor. Most of the rips online are lower bitrates and those may be ok to play. But, I agree, a full blu-ray rip may not play smoothly.