Intel has started to produce samples of a quad-core processor called Penryn that offers faster clock speeds and larger cache sizes, an executive said today.

"Our first Penryn chips are being fabricated right now and we expect them to come out very soon," said Rob Willoner, a technology analyst at Intel during a conference call with reporters.

Based on the same micro-architecture as the Core 2 Duo, Penryn is the first Intel processor to be made using a 45-nanometer process. The chip will be available in versions for notebook PCs, desktops and servers.

Currently, most Intel chips are currently made using a 65-nanometer process. Moving to the more advanced process means that the size of each transistor shrinks, allowing more of them to fit onto a piece of silicon. In addition, smaller transistors require less power and are generally faster.

Penryn chips are due to hit the market during the second half of 2007. In addition to faster clock speeds, the quad-core chips will consume less power than existing Intel products and will include new features, such as additional instructions for multimedia and high-performance computing applications, Willoner said. Intel plans to release more information about the chip next year, he said.