Sheesh. What the heck is with these Posts? Either your lazy to even research your questions on your own or your completely clueless.
Answer: At $45 for a Duron 600 and $49 for a Duron 650, you can easily go for 850mhz - 950 mhz. With a slight chance of reaching 1Ghz. For people who would want more speed, a Tbird 900 going for $165 can easy hit 1.05Ghz-1.1Ghz, with a chance to maybe hit 1.2Ghz. These would be the BEST CPU overclocking candidates.
For an Intel system, the best would be the P3 700E($161) with a good chance of reaching 933Mhz. A slim chance of reaching 1Ghz. Certainly not the BEST overclocker compared to AMD, but its the best for the Intel Platform.
Does that answer your questions?
*I probably typed 10 times more info than Mikelou26 can ever type.*
*Insert mikelou26's "shut ur hole" insult here*