Westmere microarchitecture (1st generation)

"Gulftown" (32 nm)

• All models support: MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, Enhanced Intel SpeedStep Technology (EIST), Intel 64, XD bit (an NX bit implementation), Intel VT-x, Hyper-threading, Turbo Boost, AES-NI, Smart Cache.
• Core i7-980X and 990X feature an unlocked multiplier.
• FSB has been replaced with QPI.
• Transistors: 1170 million
• Die size: 239 mm²
• Steppings: B1

Model number	sSpec number	Frequency	Turbo	Cores	L2 cache	L3 cache	I/O bus	Mult.	Memory	Voltage	TDP	Socket	Release date	Part number(s)	Release price (USD)
Core i7-970	SLBVF (B1)	3.2 GHz	1/1/1/1/2/2[Note 1]	6	6 × 256 KB	12 MB	1 × 4.8 GT/s QPI	24×	3 × DDR3-1066	0.8–1.375 V	130 W	LGA 1366	July 2010	AT80613005490AD BX80613I7970	$885
Core i7-980	SLBYU (B1)	3.33 GHz	1/1/1/1/2/2	6	6 × 256 KB	12 MB	1 × 4.8 GT/s QPI	25×	3 × DDR3-1066	0.8–1.300 V	130 W	LGA 1366	June 2011	AT80613006756AA BX80613I7980	$583
Core i7-980X	SLBUZ (B1)	3.33 GHz	1/1/1/1/2/2	6	6 × 256 KB	12 MB	1 × 6.4 GT/s QPI	25×	3 × DDR3-1066	0.8–1.375 V	130 W	LGA 1366	March 2010	AT80613003543AE BX80613I7980X	$999
Core i7-990X	SLBVZ (B1)	3.47 GHz	1/1/1/1/2/2	6	6 × 256 KB	12 MB	1 × 6.4 GT/s QPI	26×	3 × DDR3-1066	0.8–1.375 V	130 W	LGA 1366	February 2011	AT80613005931AA BX80613I7990X	$999