tobio said:
my duo core mini... 720p quicktime HD movies play back perfectly at about 40-50% cpu, 1080p quicktime HD movies play back almost perfectly at about 80-90% cpu, only dropping a few frames with fast moving scenes.
If there was a way to allocate more of the system ram to the video buffer (I think it uses 80Mb) then that would probably improve the playback performance, and I'm sure newer versions of quicktime and system updates should have performance tweaks to help as well
There have been plenty of benchmark reports, so I thought some subjective observations might be useful. I am fortunate to currently have access to a 1.25GHz and 1.42GHz PPC Mac mini and also both a Core Solo and Duo Mac mini.
The core solo seems to be approximately equivilent to a 1.33GHz PPC (it subjectively seems to be slightly better than 1.25 and slightly worse than 1.42 PPC at most jobs).
On a quiet system (only one or two apps running) CPU intensive tasks seem significantly faster than the 1.42GHz PPC, but gets sluggish much quicker than a PPC mini when multiple applications are running (this is carefully choosing native applications that don't appear to do much graphics manipulation). This could simply be an optimisation thing that will be improved in a future software update.
Again, on a quiet system, Expose and FrontRow are much more fluid on Core Solo than 1.42GHz PPC (Expose will tile 20 windows without problems), but just having a few Safari tabs open causes FrontRow or Expose to lag and judder.
On video playback (via FrontRow), the Solo seems to be about on par with a 1.33GHz PPC and Duo is perhaps a little better than a 1.5GHz PPC.
The Solo will play back a DVD just fine but misses a few frames on cached FrontRow trailers (not enough to notice unless you are looking for it). The Solo can't keep up with 720p HD on fast action (>0.1s lags and judders- noticable). 1080p is unwatchable.
I'd say that 1080p HD playback on the Duo is not good. It drops frames even on 'easy' scenes and is enough to spoil your enjoyment.
Overall, the Intel Mac mini performs well in its role of replacing (but not superceding) the PPC Mac. Unfortunately, it isn't fit for the HD living room (perhaps unless you are willing to pay over the odds to fit 2GB memory and a 2.16GHz Core Duo?).
Edit: Both PPC machines were 1GB models, both Intels had a 256MB stick (Apple) and a 1GB stick (3rd party).