The Proteas pair added 170 off just 81 balls for the first wicket, a record for any wicket in T20 internationals.

England could not keep up with a required run-rate of more than 12 from the start of their innings, and managed only 157 for eight wickets in reply to South Africa's 241 for six. The two-match series was tied 1-1.

Bosman hit 91 off 45 balls to break the South African record of 90 held by Herschelle Gibbs, before he was caught at midwicket by a diving James Anderson off the bowling of Luke Wright as he mistimed a big hit off a full-toss.

"With Graeme playing the way he did, it was much easier for me to play my natural (hitting) game," Bosman said.

South Africa captain Smith was delighted with his side's performance after having lost the first T20 game against England by one run on the Duckworth-Lewis method at the Wanderers stadium on Friday night.

"Today we put in a clinical performance... it was a great way to prepare for the ODI series which starts in Johannesburg on Friday," Smith said.

"We have given some (new) players a chance and they have taken their opportunities. It's great to have so many quality players to choose from."

Perhaps disturbed by Bosman and Smith's aggressive batting, the England bowlers failed to find their length and served up too many full-tosses. Man-of-the-match Bosman helped himself to five fours and nine sixes, while Smith, who scored 88 off 44 balls, hit eight fours and six sixes.

All the England bowlers took punishment, but the worst was Adil Rashid. The leg-spinner was hit for 25 runs in the eighth over of the innings, including two sixes each by Smith and Bosman. That turned out to be Rashid's only over.

Smith was the first to fall, in the 14th over, hitting leg-spinner Joe Denly's first ball in international cricket to long-on where Saj Mahmood held a good catch.

The frenetic Proteas batting tempo slowed in the final five overs, with just 47 runs being scored.

Of the other South Africa batsmen, AB de Villiers was the only one to pass 20, contributing 24 off 13 balls before being run out.

Kevin Pietersen, in the England team after four months out with an ankle injury, claimed the wicket of Albie Morkel for 14. Other England bowlers to pick up a single wicket each were Denly, Anderson, Wright and Mahmood.

When England batted, Denly played on off Yusuf Abdulla to be out for 14 off 14 balls in the fourth over.

Alastair Cook was out for 26 off 21 balls in the 10th over trying to force the pace. After hitting five fours he hit a Morkel delivery to Roelof van der Merwe at midwicket. At that point England needed 177 runs to win off 10.3 overs.

South African-born pair Jonathan Trott and Pietersen added 52 runs for the third wicket in 5.4 overs, before Trott top-edged a delivery from Morkel and was well caught by debutant Proteas wicketkeeper Heino Kuhn at square-leg. Trott collected a four and three sixes in his 40-ball innings of 51.

Pietersen was next to go, bowled for 29 off 19 balls by Van der Merwe as he attempted a switch-hit. Pietersen, who had been scheduled to return to action in Tuesday's 50-over match against South Africa A in Potchefstroom, hit one four and two sixes.

By the time he was out, England required 110 runs off 20 balls, and the contest was long over.

Dale Steyn had the best bowling figures for South Africa of two for 29, while Morkel finished with two for 35. Abdulla, Ryan McLaren and Van der Merwe took one wicket apiece.