Apple Computer Inc. said Friday it will postpone the release of what it says are "the world's fastest personal computers" on the Japanese market by one month.

Consequently, the Power Mac G5 series -- the first consumer PC equipped with a high-speed 64-bit microprocessor -- will debut in Japan in September.

Production of the three Power Mac G5 models is behind schedule, it said.

Apple Computer said it has already landed orders for 100,000 Power Mac G5s worldwide.

In the United States, Apple already put some Power Mac G5 models on store shelves.