I know this question has been asked before, but I only saw the thread from 2007. Now in 2009 when quad cores are reasonably priced, is there there a performance boost from a quad core at a lower speed than a dual core at a higher speed. I'm thinking of a Phenom 9600 (+/-) vs. Athlon X2 6000. I don't do gaming, but I do some DVD burning/editing from a camcorder (AVCHD format). My current single core processor gets bogged down when I do this and has become unstable (reboots, or causes an error and closes the program). Also, what memory (800 vs. 1066) works better with these and which motherboard should I consider?