tools like k10stat allow you do have custom CNQ profiles even with overlocking. This is something I'd love to see on intel as speedstep doesn't work very well with ocing. For example on my old Phenom 2 setup I could be idling .8V 1200MHz, then in a flash when needed I'd be at 3850MHz 1.488V
I'm not sure if overdrive works with nvidia chipsets...it probably does though. Why do you ask? your board in your sig is one of the best you can buy.
As for your 3rd question I can't answer that. Are you sure it doesn't help though? have you tried any benchmarking programs that allow selecting the number of used threads?

I'm not sure if overdrive works with nvidia chipsets...it probably does though. Why do you ask? your board in your sig is one of the best you can buy.
As for your 3rd question I can't answer that. Are you sure it doesn't help though? have you tried any benchmarking programs that allow selecting the number of used threads?