Westmere (microarchitecture)

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Westmere

Topside of a Core i7-970
General information
Launched	January 7, 2010; 15 years ago (January 7, 2010)
Performance
Max. CPU clock rate	1.06 GHz to 4.40 GHz
QPI speeds	4.80 GT/s to 6.40 GT/s
DMI speeds	2.50 GT/s
Cache
L1 cache	64 KB per core
L2 cache	256 KB per core
L3 cache	2 MB to 30 MB shared
Architecture and classification
Microarchitecture	Nehalem
Instruction set	x86-16, IA-32, x86-64
Extensions	AES-NI, CLMUL MMX, SSE, SSE2, SSE3, SSSE3, SSE4, SSE4.1, SSE4.2 VT-x, VT-d
Physical specifications
Transistors	382M to 2600M 32nm
Cores	2-6 (4-10 Xeon)
GPUs	533 MHz to 900 MHz 177M 45nm (K0)
Sockets	LGA 1156 LGA 1366 LGA 1567 rPGA988A
Products, models, variants
Model	Core in, Xeon
History
Predecessor	Nehalem
Successor	Sandy Bridge
Support status
Unsupported

Westmere, (formerly Nehalem-C,) is a CPU microarchitecture developed by Intel. It is a 32 nm die shrink of its predecessor, Nehalem, and shares the same CPU sockets with it. Some Westmere models have integrated graphics processors. They are branded as Intel HD Graphics, and support the DirectX 10.1 and OpenGL 2.1 API.

The first Westmere-based processors were launched on January 7, 2010. They were subsequently made available under Intel's brands of Core, Pentium, Celeron and Xeon.