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Penryn µarch
General Info
Arch Type	CPU
Designer	Intel
Manufacturer	Intel
Introduction	November, 2007
Phase-out	September, 2008
Process	45 nm
Instructions
ISA	x86-16, x86-32, x86-64
Succession
Core Nehalem

Penryn was the microarchitecture for Intel's 45 nm process for desktops and servers as a successor to Core. Penryn was replaced by the Nehalem microarchitecture in late 2008.

Dunnington wafer

Die Shot

Dual-core Penryn 3MB

• 3MB L2 cache
• 81 mm²
• 274,000,000 transistors
• 45 nm process
• 2 cores

Dual-core Penryn 6MB

• 6MB L2 cache
• 107 mm²
• 410,000,000 transistors
• 45 nm process
• 2 cores

Hexa-core Penryn

• 503 mm²
• 1,900,000,000 transistors
• 45 nm process
• 6 cores