well from what I know about computers multicores I can tell you my opinion on this:
you got way too much stuff like mate say so when reason aint running you have all them tracks on standby using one core so cpu level should be way up and then when you play it would use the other cores ?
try to put more stuff if the bar get low at one point maybe it's because you have make a 2nd core work on that ?
I am not shure ast all about that !
It's like gambling !!!
but you get something out the slot everytime you click ! lol
No Respect for the Talion Law , I whant it All !