Is my actual CPU Intel Dual Core E7200 with 3.06 GHz sufficient for simultaneous audio and video?
This question has no simple answer. I have my system working very well now with an i7 2600K processor, integrated HD3000 graphics, USB outboard ASIO DAC. I have no video card and no audio card, the i7 does it all. A person could build a tiny HTPC if desired.
When I first started with my HTPC adventure in December I had audio skipping, dropouts, jerky video, terrible lip sync, etc. Now, thanks to continuous development by JRiver and some tweaking, I have performance better than all the gear I replaced. This did require many setting adjustments in BIOS, Windows 7, Intel drivers, ASIO Drivers, VST plugins, FIR filters, and JRiver MC.
I still have a few issues to fix or improve and tweaking with DRC software has no end to it, you just stop and call it good at some point.