Last updated
General information
Launched1H 2010
Designed by Intel Corporation
CPUID code0206Cx
Product code80613, 80614
Max. CPU clock rate 3.2 GHz to 3.46 GHz
L2 cache6 × 256 KB
L3 cache12 MB
Architecture and classification
ApplicationUP/DP Server, Workstation, Gaming
Min. feature size 32 nanometer
Microarchitecture Westmere
Instruction set x86, x86-64, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AES-NI
Physical specifications
  • 6 (physical), 12 (logical)
  • LGA-1366
Products, models, variants
Brand name(s)
  • Core i7-970, 980, 980X, 990X
  • Xeon 3600s, 5600s

Gulftown [1] or Westmere-EP [2] is the codename of an up to six-core hyperthreaded Intel processor able to run up to 12 threads in parallel. It is based on Westmere microarchitecture, the 32 nm shrink of Nehalem. [3] Originally rumored to be called the Intel Core i9, it is sold as an Intel Core i7. [4] The first release was the Core i7 980X in the first quarter of 2010, [5] [6] [7] along with its server counterpart, the Xeon 3600 and the dual-socket Xeon 5600 (Westmere-EP) series using identical chips.



First figures indicate that at equivalent clock rates, depending on the software, it has up to 50% higher performance than the identically clocked quad-core Bloomfield Core i7-975. Despite having 50% more transistors, the CPU strongly benefits from the 32-nm process, drawing the same or even less power (depending on the operating system) than its Bloomfield predecessors with merely four cores. The thermal design power (TDP) of all planned models is stated to be 130 watts.

Westmere-EP is the first six-core dual-socket processor from Intel, following the quad-core Bloomfield and Gainestown (also known as Nehalem-EP) processors using the same LGA 1366 package, while the earlier Dunnington six-core processor is a Socket 604 based multi-socket processor. The CPUID extended model number is 44 (2Ch) and two product codes are used, 80613 for the UP desktop/server models and 80614 for the Xeon 5600-series DP server models. In some models, only four of the six cores are enabled.

Since 2014, Xeon 3600 and 5600 series Westmere-EP processors became somewhat sought-after as an upgrade route for older X58 motherboards. [8] In some cases, motherboard BIOS revisions have allowed the installation of these six core processors onto boards originally targeted for two or four core processors. In fully threaded workloads, total system performance will increase by a value equal to the number of cores added (i.e. moving from a four core 2.6 GHz to a six core 2.6 GHz system would deliver 50% more multithreaded performance). With proper BIOS support and the correct supporting components, many users have reported substantial overclocking potential, often as high as 4.4 GHz while staying within Intel's maximum allowed voltages (no higher than 1.35v for the core or the uncore) [9]


Brand Name (list)CoresL3 CacheSocketTDPI/O Bus
Core i7-990X 612 MB LGA 1366 130 W QuickPath
Core i7-980X [10] [11]
Xeon 36xx
Xeon 56xx 2-640-130 W

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Xeon is a brand of x86 microprocessors designed, manufactured, and marketed by Intel, targeted at the non-consumer workstation, server, and embedded system markets. It was introduced in June 1998. Xeon processors are based on the same architecture as regular desktop-grade CPUs, but have advanced features such as support for ECC memory, higher core counts, support for larger amounts of RAM, larger cache memory and extra provision for enterprise-grade reliability, availability and serviceability (RAS) features responsible for handling hardware exceptions through the Machine Check Architecture. They are often capable of safely continuing execution where a normal processor cannot due to these extra RAS features, depending on the type and severity of the machine-check exception (MCE). Some also support multi-socket systems with two, four, or eight sockets through use of the Quick Path Interconnect (QPI) bus.

The Intel QuickPath Interconnect (QPI) is a point-to-point processor interconnect developed by Intel which replaced the front-side bus (FSB) in Xeon, Itanium, and certain desktop platforms starting in 2008. It increased the scalability and available bandwidth. Prior to the name's announcement, Intel referred to it as Common System Interface (CSI). Earlier incarnations were known as Yet Another Protocol (YAP) and YAP+.

The Intel Core microarchitecture is a multi-core processor microarchitecture unveiled by Intel in Q1 2006. It is based on the Yonah processor design and can be considered an iteration of the P6 microarchitecture introduced in 1995 with Pentium Pro. High power consumption and heat intensity, the resulting inability to effectively increase clock speed, and other shortcomings such as an inefficient pipeline were the primary reasons why Intel abandoned the NetBurst microarchitecture and switched to a completely different architectural design, delivering high efficiency through a small pipeline rather than high clock speeds. The Core microarchitecture initially did not reach the clock speeds of the NetBurst microarchitecture, even after moving to 45 nm lithography. However after many generations of successor microarchitectures which used Core as their basis, Intel managed to eventually surpass the clock speeds of Netburst with the Devil's Canyon microarchitecture reaching a base frequency of 4 GHz and a maximum tested frequency of 4.4 GHz using 22 nm lithography.

Pentium Brand of microprocessors produced by Intel

Pentium is a brand used for a series of x86 architecture-compatible microprocessors produced by Intel since 1993. In their form as of November 2011, Pentium processors are considered entry-level products that Intel rates as "two stars", meaning that they are above the low-end Atom and Celeron series, but below the faster Intel Core lineup, and workstation Xeon series.

Nehalem (microarchitecture)

Nehalem is the codename for an Intel processor microarchitecture released in November 2008. Nehalem was used in the first generation of the Intel Core processors. Nehalem is the successor to the older Core microarchitecture.

Sandy Bridge Intel processor microarchitecture

Sandy Bridge is the codename for the microarchitecture used in the "second generation" of the Intel Core processors. The Sandy Bridge microarchitecture is the successor to Nehalem microarchitecture. Intel demonstrated a Sandy Bridge processor in 2009, and released first products based on the architecture in January 2011 under the Core brand.

Haswell (microarchitecture) Intel processor microarchitecture

Haswell is the codename for a processor microarchitecture developed by Intel as the "fourth-generation core" successor to the Ivy Bridge. Intel officially announced CPUs based on this microarchitecture on June 4, 2013, at Computex Taipei 2013, while a working Haswell chip was demonstrated at the 2011 Intel Developer Forum. With Haswell, which uses a 22 nm process, Intel also introduced low-power processors designed for convertible or "hybrid" ultrabooks, designated by the "Y" suffix.

Wolfdale (microprocessor)

Wolfdale is the code name for a processor from Intel that is sold in varying configurations as Core 2 Duo, Celeron, Pentium and Xeon. In Intel's Tick-Tock cycle, the 2007/2008 "Tick" was Penryn microarchitecture, the shrink of the Core microarchitecture to 45 nanometers as CPUID model 23. This replaced the Conroe processor with Wolfdale.

Yorkfield is the code name for some Intel processors sold as Core 2 Quad and Xeon. In Intel's Tick-Tock cycle, the 2007/2008 "Tick" was Penryn microarchitecture, the shrink of the Core microarchitecture to 45 nanometers as CPUID model 23, replacing Kentsfield, the previous model.

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 with a new memory and bus interface. The product code for Lynnfield is 80605, its CPUID value identifies it as family 6, model 30 (0106Ex).

Bloomfield (microprocessor) Code name for Intel high-end desktop processors sold as Core i7-9xx and Xeon 35xx., replacing the earlier Yorkfield processors

Bloomfield is the code name for Intel high-end desktop processors sold as Core i7-9xx and single-processor servers sold as Xeon 35xx., in almost identical configurations, replacing the earlier Yorkfield processors. The Bloomfield core is closely related to the dual-processor Gainestown, which has the same CPUID value of 0106Ax and which uses the same socket. Bloomfield uses a different socket than the later Lynnfield and Clarksfield processors based on the same 45 nm Nehalem microarchitecture, even though some of these share the same Intel Core i7 brand.

Intel Core Brand name that Intel uses for various mid-range to high-end consumer and business microprocessors

Intel Core are streamlined midrange consumer, workstation and enthusiast computers central processing units (CPU) marketed by Intel Corporation. These processors displaced the existing mid- to high-end Pentium processors at the time of their introduction, moving the Pentium to the entry level, and bumping the Celeron series of processors to the low end. Identical or more capable versions of Core processors are also sold as Xeon processors for the server and workstation markets.

LGA 2011

LGA 2011, also called Socket R, is a CPU socket by Intel. Released on November 14, 2011, it replaces Intel's LGA 1366 and LGA 1567 in the performance and high-end desktop and server platforms. The socket has 2011 protruding pins that touch contact points on the underside of the processor.

Socket G1

Socket G1, also known as rPGA 988A, is Intel's CPU socket for their line of mobile Core i7, the successor to the Core 2 line. It is based on Intel's Nehalem architecture which was first available for the 1366-pin "Socket B", which, like its predecessor, LGA775, uses the LGA socket configuration. Later followed the updated LGA-1156 socket, which moved the QPI and PCI-express controller off the Northbridge and onto the CPU. As a result of the lower pin count, LGA-1156 systems, and later, socket G1 systems, can only run in Dual-channel memory mode, as opposed to the Triple-channel mode which is unique to the LGA-1366 platform. The Nehalem's mobile variant was released on September 23, 2009 in the form of the i7-720QM, 820QM, and 920XM models, followed by the i7-740QM, 840QM, and 940XM models on June 21, 2010. The newer CPUs use the new Clarksfield core, which maintained the same 45 nm manufacturing process as the desktop-based Nehalems. Nehalem received a die shrink on January 7, 2010, under the core name of Westmere. With the Intel GMA HD Graphics Ironlake core packaged onto the CPU substrate, but not integrated directly to the processor die, it goes on to create the Arrandale-based line. The current CPUs to use this package are the Core i7-6x0M series, the Core i5-4x0M series, the Core i5-5x0M series, the Core i3-3x0M series, and finally the Pentium P6x00 series and Celeron P4x00 series which were released on March 28, 2010. However, not all of these are available for Socket G1, as some of them are only available in a BGA package. They are also known as PGA988 socket processors.

Skylake (microarchitecture)

Skylake is the codename used by Intel for a processor microarchitecture that was launched in August 2015 succeeding the Broadwell microarchitecture. Skylake is a microarchitecture redesign using the same 14 nm manufacturing process technology as its predecessor, serving as a "tock" in Intel's "tick–tock" manufacturing and design model. According to Intel, the redesign brings greater CPU and GPU performance and reduced power consumption. Skylake CPUs share their microarchitecture with Kaby Lake, Coffee Lake, Cannon Lake, Whiskey Lake, and Comet Lake CPUs.

Ivy Bridge (microarchitecture)

Ivy Bridge is the codename for the "third generation" of the Intel Core processors. Ivy Bridge is a die shrink to 22 nanometer manufacturing process based on the 32 nanometer Sandy Bridge —see tick–tock model. The name is also applied more broadly to the 22 nm die shrink of the Sandy Bridge microarchitecture based on FinFET ("3D") Tri-Gate transistors, which is also used in the Xeon and Core i7 Ivy Bridge-EX (Ivytown), Ivy Bridge-EP and Ivy Bridge-E microprocessors released in 2013.

Westmere (microarchitecture)

Westmere is the code name given to the 32 nm die shrink of Nehalem. While sharing the same CPU sockets, Westmere included Intel HD Graphics, while Nehalem did not.

LGA 1151

LGA 1151, also known as Socket H4, is an Intel microprocessor compatible socket which comes in two distinct versions: the first revision which supports both Intel's Skylake and Kaby Lake CPUs, and the second revision which supports Coffee Lake CPUs exclusively.

Coffee Lake eighth-generation Intel Core microprocessor family

Coffee Lake is Intel's codename for its eighth generation Core microprocessor family, announced on September 25, 2017. It is manufactured using Intel's second 14 nm process node refinement. Desktop Coffee Lake processors introduced i5 and i7 CPUs featuring six cores and Core i3 CPUs with four cores and no hyperthreading.


  1. "Products Formerly Gulftown". Intel.
  2. "Products Formerly Westemere-EP". Intel. Archived from the original on 2012-10-25.
  3. Jon Worrel (2009-07-23). "Core i9 is the new 32nm Gulftown moniker". Fudzilla. Archived from the original on November 10, 2014. Retrieved 2010-09-24.
  4. Samendk (2009-12-03). "Новости о процессорах Intel Core 2 Duo E8700 и Core i7 980X" [News about Intel Core 2 Duo E8700 and Core i7 980X] (in Russian). OCClub. Archived from the original on 2010-01-05. Retrieved 2010-03-26.
  5. "Gulftown i7 980X specs". Archived from the original on 2011-07-21. Retrieved 2010-03-26.
  6. "Intel roadmap for desktop CPU in 2010". Archived from the original on 2011-07-21. Retrieved 2010-03-26.
  7. Florian Vieru (2009-12-14). "Gulftown sera le Core i7-980X, Core i7-930 pour bientôt!" [Gulftown will be the Core i7-980X, Core i7-930 coming soon!] (in French). Archived from the original on 2009-12-18. Retrieved 2010-03-26. Our Chinese colleagues at PConline have put their hands on slides showing the Core i7-980X, better known by its codename Gulftown
  8. Enthusiast page demonstrating six core performance Retrieved 2020-05-23.
  9. Intel Ark Entry for X5650 Retrieved 2020-05-23.
  10. Hilbert Hagedoorn (2009-12-15). "Intel Core i7 980X hexacore pricing revealed". The Guru of 3D. Retrieved 2010-03-26.
  11. Anton Shilov (2010-02-09). "Intel to Launch Three Six-Core "Gulftown" Processors for Desktops". X-bit labs. Archived from the original on 2010-03-27. Retrieved 2010-03-26.