The Great fighters, Ali, Tyson said that the punch that the opponent didn't expect would cause the most damage, In other words, Speed would be a more important factor in a KO, because it is so unpredictable and devastating. I was watching the first fight between Ali and Frazier, Ali is absorbing tremendous amount of damage from Frazier, he is taking all sorts of strong hooks to his jaw, he doesn't seem to be fazed, but in the later rounds, one quick jab from Frazier sends ali crashing to the ropes, which would have been a knockdown if the ropes weren't there. Speed is more important in a KO but power is also important, It's like comparing George Foreman and Muhammad Ali.

From what I've read, a lot of boxers who've been knocked out say they never saw the knock out punch coming. I guess the element of surprise is a big factor in knocking someone out. Also, I know this is lame, but if you see those videos of people playing that cowardly game of "knockout", many of the victims are unaware of the attack on them.

it's surprise it's the one you don't see that knocks you out heavyweight boxers have tremendous power in their punches and they take them boxers are trained fighters they are strong in the neck they can take heavy punches to the head if they can see it coming so your theory is a bit mixed up it doesn't have to be fast or particularly heavy if it's well place and out of the blue down you go George Forman had a tremendous punch he destroyed Joe Frazer in two quick fights he destroyed every body yet Mohammed Ali let him punch the hell out of him for six rounds in the famous rope a dope Forman threw the kitchen sink at him and this man had a sledgehammer Ali fended and dodged and took these punches because he watched them coming Ali was not noted for his heavy punch but Forman now tired took a flurry of these not so heavy punches confused one caught him on the button it was over he was physically tired yes but he hadn't had a glove on him up till then the rumble in the jungle if you want to see it

A combination of punch technique, weight, speed, timing, unfavorable positioning of the boxer who was hit, surprise, right place on the body that was hit; causes the knockout.

Also, due to the technique involved, training, and some other things; most, even the weakest boxers can k.o their opponents when under the right conditions. That is why every boxer is said to have a "punchers chance".

Speed kills but not in the manner that force or power does. Speed is essential in outboxing or outpunching an opponent later wearing him down and setting him up for a knockout or stoppage. But force or power could end a fight in an instant once a powerful punch lands squarely on the target whether on the jaw the temple the point of the chin or the rib cage or solar plexus areas. Here power plus accuracy and technique work together for the devastating result.

KO artists as George Foreman and Julian Jackson were not noted for their speed.

A lot of things vary. It could be the blend of accuracy and power, a surprise(hence the name "flash knockout") or the fighter was just simply gassing out and becomes too tired to take more shots.

It doesn't matter. Could be either one or both. Its the ones you don't see.

Bofe, and form x accuracy.

Speed overcomes defence. Power and application is what causes a knockout. Rapid head movement which jars the brain causes the loss of consciousness.

speed is power, and location helps

I am not asking what causes a KO... The question is more of speed vs power question... I mean people say speed=power which will cause a knockout so then if i hit someone with paper super fast, that will never knock them out (its just an exmple, u get the idea) but then if a train at u really slow that also wudnt do much... But obviously we are humans and we all have mass in our punches even the weakest punchers, but if these weak punchers had punches which can still snap the head (which anyone can) with extreme speed would this cause a knockout? I will say yes but want to hear everyones opinions...

So now as we all know jabs are fast, so why is it that you are less likely to knock some out with jabs rather than hooks? Can this be because of the momentum and that hooks have more momentum..? I am also aware of where you hit but thats not whatt im asking...

Finally why do boxers turn their hips and pivot... If speed can knockout someone why pivot and get power from hips, im just struggling to understand why we try to generate more power with hips and pivots when speed can also knockout someone? Or does hips and pivots also generate speed? Or am i just wrong? Can pivots and hips also snap to generate speed also...? Explainnnnn :p thankss