Lynnfield (microprocessor)

Lynnfield

Produced	2009
Designed by	Intel
Max. CPU clock rate	2.40 GHz to 3.06 GHz
Min. feature size	45 nm
Instruction set	x86, x86-64, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2
Microarchitecture	Nehalem
CPUID code	106Ex
Product code	80605
Cores	4
L2 cache	4x256kb
L3 cache	8 MB
Socket(s)	LGA 1156
Application	Desktop
Brand name(s)	Core i5-7xx Core i5-7xxS Core i7-8xx Core i7-8xxS Core i7-8xxK Xeon X34xx Xeon L34xx

Lynnfield is the code name for a quad-core processor from Intel released in September 2009. It was sold in varying configurations as Core i5-7xx, Core i7-8xx or Xeon X34xx. Lynnfield uses the Nehalem microarchitecture and replaces the earlier Penryn based Yorkfield processor, using the same 45 nm process technology, but a new memory and bus interface. The product code for Lynnfield is 80605, its CPUID value identifies it as family 6, model 30 (0106Ex).

Lynnfield is related to the earlier Bloomfield and Gainestown microprocessors, which are used in server and high-end desktop systems. The main difference between the two is Lynnfield's use of the LGA 1156 processor socket as opposed to the LGA 1366 socket used by Bloomfield and Gainestown processors.LGA 1156 processors include Direct Media Interface and PCI Express links, which Intel has previously connected to the processor with a dedicated northbridge chip, called the memory controller hub or I/O hub.

The mobile version of Lynnfield is Clarksfield.

Brand names

Brand name	Model (list)	Logo	Market	Clock frequency range	HT	ECC RAM/Max. RAM
Core i5	i5-7xx	50px	Performance desktop	2.66–2.80 GHz	No	No/16 GB
	i5-7xxS			2.40 GHz
Core i7	i7-8xx	50px		2.80–3.06 GHz	Yes
	i7-8xxK			2.93 GHz (unlocked)
	i7-8xxS			2.53 GHz
Xeon	34xx		UP Server	1.86–2.93 GHz	some	Yes/32 GB

See also

• Nehalem (microarchitecture)
• Yorkfield (microprocessor)
• Clarksfield (microprocessor)

External links

• Intel's Lynnfield Processor & its New Power Control Unit