Thank you so much for replies.
Catalyst runs from 2 internal HDDs. One of them is ssd 128, another is generic 7200rpm hdd. Both discs are NOT system.
Capture card is blackmagic intensity pro.
MAC Pro OS X 10.6.5
2x2.4GHz Quad-Core Xeon
gpus geforce gt 120 512vram
6Gb 1066Mhz DDR3.

So, I understand my faults... In couple of days I will install 364, and will convert avc1 coded clips to right coded. And I feel everything will be fine