Penryn will extend the Core 2 architecture - it's expected to play host to the fourth set of Intel's Streaming SIMD Extensions (SSE), a further 48 instructions designed to improve the processor's ability to handle multimedia applications. Penryn will also introduce two further instructions dubbed by Intel "application-targeted accelerators".
Penryn will be play a key part of 'Montevina', Intel's next-but-one generation of its Centrino mobile platform. Montevina's likely to appear in H1 2008, a year after the next Centrino, 'Santa Rosa'. In the second half of 2008, just as AMD is beginning to roll out its own 45nm CPUs, Intel is scheduled to introduce 'Nehalem', the successor architecture to Core 2.
The 45nm Penryn will enter production in the second half of this year, with mass production planned in 2008.