You can have one without the other, but there are some exceptions to the rule. I believe alot of Pacmans power is there because he throws his power shots with a tremendous amount of speed. Speed can definitely help raise the power level, but only if you have some natural strength to begin with, also the type of punches play a huge part in that. A good example is Muhammad Ali. He is considered to be a fairly light handed boxer who's KO's were mostly created by accumulation of punches and or cuts. This is true, however when Ali planted his feet and threw with anger, he hit pretty damn hard. (the Cleveland Williams fight is the perfect example).
SRR not only had BOTH, gw, he was the whole package -- a religious experience seeing him train 'n fight live in the '40s and '50s.
Speed allows zou to catch someone off guard and do some damage despite punches not having a lot of power behind them. Paul Malinagii was able to knock down Ndou who has an iron chin.
Yes, Force = kmv where v is speed (in theory). It's about speed, mass of your arm and punch technique - how you make contact and how accurate you are.
Following on from above... Power = Energy/Time Energy = Force x Distance Force = Mass x Acceleration Greater Acceleration (Speed) = Greater Force Greater Force = Greater Energy Greater Energy = Greater Power Physics NEVER lies. Delving deeper into the issue you need to take into account Pressure and other such variables...all pretty much amounting to the same thing. Speed Kills
what our astute colleague is trying to say is that all thing being equal (arm mass, distance a punch travels) the only factor effecting the power of a punch is speed. everything else; accuracy, how easy your punches are to see coming, are superfluous to the actual force generated by the blow, these things are not classes as power they are classed as technique/skill.
Tommy Hearns, Sugar Ray Robinson, Mike Tyson, and Middleweight to Super Middleweight Roy Jones say different.