So what are peoples estimates and expectations on Intel i5 based CPU's arriving in Macbooks soon? Core i5 (codenamed Lynnfield) is an upcoming family of Intel desktop x86-64 microprocessors. It is scheduled to be released in the third quarter of 2009 using the Intel Nehalem microarchitecture and is a mainstream variant to the Intel Core i7 family. Core i5 microprocessors will feature an integrated dual-channel DDR3 memory controller, integrated PCI-Express graphics controller and Direct Media Interface controller for communication with Intel P55 (Ibexpeak) chipset. Oh dear, nvidia wont like that.