The Advertising Standards Authority (ASA) said that the G5 was not the fastest computer “in all circumstances for all applications”.
The first claim was based on independent tests comparing the Apple computer with two of its competitors – the Dell Dimension 8300 and the Dell Precision 650.
The ASA said it took expert advice and concluded that the claim could not be justified.
“It understood from the advice that the advertisers’ tests showed the Power Mac G5 was faster than the other two processors on some applications under certain conditions, but not that it was the fastest processor in all circumstances for all applications,” said the ruling.
Read more at BBC News