The Malaysians, who had sizzled in their opening match on Saturday against Japan's Naoki Kawamae-Shoji Sato, were even more impressive against former world champions Howard Bach-Tony Gunawan of the United States.
The Malaysians were totally dominant, winning 21-12, 21-14 in 24 minutes, and if they can maintain their form, will be a handful for any pair in the knockout stages.
"All we want to do is focus on the competition and try to go as far as we can," said Kien Keat.
"We have worked hard for the Olympics and we will try our best to win a medal."
Boon Heong said Sunday's performance would further boost their confidence ahead of their final Group D clash against South Koreans Chung Jae Sung-Lee Yong Dae, who will offer them a challenge of a totally different level.
"It will be tough against the Koreans but we are playing well and are looking forward to the clash," said Boon Heong.- NST