A report claims Apple is planning to introduce revised laptops as soon as September.

According to DigiTimes, 'sources' at notebook and component manufacturers claim Apple will launch notebooks that use Intel's new 64bit 'Merom' chip – the Core 2 Duo T7600 processor – in September.

At present, MacBooks and MacBook Pros use the Core Duo T2600 chip (called Yonah). The Merom chip features double the on-chip cache (4MB, not 2MB) of Yonah and runs at lower operating temperatures. They also last slightly longer on a single battery charge.

The report emanates from the Chinese-language Commercial Times.

The report explains that both Apple's key notebook makers, Asus and Quanta, ship 200,000-300,000 units per month, and that shipments remain solid "despite the seasonal downturn".