Question about Pentium D dual core.

[SPL Tech]

I just bought a Dell XPS 400 with a Pentium D / Intel VIIV 2.8 GHz. processor. I am trying to figure out how dual core processors work. With mine is it 2.8 GHz. between both processors or 2.8 GHz. for EACH processor for a total of 5.6 GHz. of processing power? The other question I have is say one processor is running a game and the other is running Windows. Say that the processor running Windows is only at 500 MHz. of usage. Then say the processor running the game maxes out and requires more then 2.8 GHz. In that case would the load spill over onto the other processor to provide more processing power to the game? Like 3.5 or 4 GHz. or whatever's needed?