Intel launched the Core i5 540M back in January and it will be selling this CPU in the Power Optimised Performance (POP2) market segment until Q4 2010.

At this time, the company plans to launch new CPU simply called Core i5 580M. While the Core i5 540M works at 2.53GHz the new Core i5 580M will be bumped up to 2.66GHz. With the help of Turbo this new CPU will increase its clock to 3.33GHz, while its graphics can jump all the way to 766MHz.

The previous Core i5 540M can turbo overclock to 3.06GHz, while its base clock is 2.53GHz. Both chips are based on Arrandale 32nm CPU and 45nm graphics core, they have a base graphics frequency of 500MHz, two cores and four thread support, 1066MHz FSB and 3MB of cache.

They both have a 35W TDP rating and the only real difference between Core i7 620M and Core i5 580M will be that i7 part has 4MB cache while i5 part has 3MB. Don't forget that i7 will certainly cost more.

The expected time of the release for Core i5 580M is Q4 2010.