All 12 United States players scored while logging double-digit minutes.
Reggie Evans of Iowa scored 20 points, while Brian Cook of Illinois and Carlos Boozer of Duke each had 17 points. The Americans led by 40 points by the end of the third period. The smaller South Koreans were forced to shoot from the perimeterm hitting eight of 35 three-pointers.
"We were just bigger and stronger, and it's tough when there is such a size advantage," said U.S. coach Jim Boeheim, who went to his bench early.
The United States improved to 2-0 in the 12-nation event. The Americans won the inaugural tournament in Spain in 1993 and Australia won the second tournament in Melbourne in 1997.
The top four teams in each group advance to the quarterfinals, which begin Friday. The United States plays undefeated Argentina today.
"We'll have a tougher time with Argentina," Boeheim said. "But I like the way our team is playing. We had 36 assists tonight and when you get guys playing together like that it's a good sign."
St. Joseph's sophomore guard Jameer Nelson set a USA record for most assists in a game with 10, breaking the record of nine set by Andre Miller versus China in 1997.
Boeheim sees the Argentina game as pivotal.
"When you play three games in a row like this, you have to keep playing
hard to get in a good rhythm so you'll be ready the next night," Boeheim said. "Everybody got an opportunity to play tonight and I thought obviously we played very well, but we know with Argentina coming up tomorrow how difficult it will be. They're playing very well and it will be a tremendous challenge for us."
On Saturday, the Americans' 128 points were the most scored by a U.S. team in the event, breaking the previous mark of 107 scored against China in the 1997 competition.
The USA's 55-point margin of victory is the second best in the 18 U.S. games played in this event, trailing only the 68 point victory margin established against China (107-39) in 1997.
The U.S. squad also established team single game USA marks for most field goals made with 50, breaking the previous record of 42 versus Angola; most field goals attempted with 80, breaking the previous high of 77 versus France in 1993; most assists with 36, breaking the previous record of 30 versus China in 1997. The U.S. tied a record with most rebounds with 53 .
In other Group B games, Luis Alberto Scola scored 42 points as Argentina improved to 2-0 with a 92-77 victory over winless Croatia.
Fumio Murayama hit seven of 10 from the 3-point line and scored 22 points but it wasn't enough as Israel defeated the host nation 102-80. Israel won its second straight while Japan dropped to 0-2.
In Group A, Carlos Cabezas scored 36 points to power Spain (2-0) to a 75-71 win over defending champion Australia (1-1). improved to 2-0.
In other Group A games, Slovenia defeated Egypt 76-62 to improve to 2-0 and leave Egypt at 0-2. The Dominican Republic won for the first time, downing winless Qatar 101-79.