Occasional Frame Drop with Eden on Lenovo Q110 (ATOM N230)

Hi,

Sorry for this posting if it's a duplicate. I did some research on Google and this forum as well but no luck finding the exact same problem.

I have a Lenovo Q110 box, which's built with an ION platform, N230 CPU, 2G ram and 250G HDD. Right now I am still using XBMCbuntu Eden release and found a performance problem, which also makes me hesitate to upgrade to latest Frodo. I was using the old XBMCubuntu 9.10 since 2010 and hat version worked quite good.

Right after installation there's an annoying problem from the day it's installed. When a 1080p movie is played back, there's occasionally a frame drop (1-4 frames) minute to minute. The period of drop is very short( ~1s or less) but still noticable. When the issue happens,

• CPU usage is not high
• a/v sync is not lost
• vq is still very high - (no buffer underrun, I guess?)
• no dts, audio set to 2.0
• use HDMI to transfer audio/video to a SONY TV
  

My questions are

1. Is ATOM N230/2g memory stick enough for XMBCbuntu 11.x? If yes, will it still be cool for 12.1 release if I do an upgrade?
2. If the hardware is powerful enough, what might be the reason ?
   

Please forgive me if this is a silly beginner question - I really cannot find out answer to this, seems it's not a freqently asekd one. Any help is highly appreciated.