Intel plans to launch four 32nm dual-core Arrandale CPUs (Calpella platform), the Core i5-520M, Core i5-430M, Core i3-350M and Core i3-330M, in the first half of January 2010 for the mainstream notebook segment, according to sources from notebook players.

The Intel Core i5-430M runs at a clock speed of 2.26GHz, but with Intel's Turbo Boost technology, it can run up to 2.53GHz for a single core. The Intel Core i3-350M also runs at 2.26GHz, but does not support Turbo Boost technology; Intel Core i3-330M runs at 2.13GHz and also does not support Turbo Boost technology.

Core i5 CPUs will feature a graphics clock that runs at a base speed of 500MHz but can also run at speeds up to 766MHz. The Core i3 also runs at 500MHz but can also run at speeds up to 667MHz. Both series support DDR3 memory up to 1066MHz and feature 3MB L3 Cache with a TDP of 35W.

Intel will launch six more CPUs in the third quarter of 2010 with some models under its Pentium brand for the same segment, the sources noted.

The new CPUs, together with the recently released Windows 7, are expected to help boost demand for notebooks in the first quarter of 2010, the sources predict.