I know this is a little old, but here are the supported CPU's for the Zino HD 400:
AMD's Athlon 64 2650e/2850e or Athlon 64 X2 3250e/6850e
The 3250e and 6850e are dual core and give a better experience than the single core 2650e/2850e
Another addition you may want to consider is the Broadcom Crystal HD BCM70015 which will improve HD support.
Also using Windows Media Player Classic helps with playing blue-ray files