Bloomfield (microprocessor)

Last updated
General information
LaunchedNovember 2008
DiscontinuedJanuary 2011
Designed by Intel
CPUID code106Ax
Product code80601
Max. CPU clock rate 2.66 GHz to 3.33 GHz
L2 cache4× 256 kB
L3 cache8 MB
Architecture and classification
Min. feature size 45 nm
Microarchitecture Nehalem
Instruction set x86, x86-64, MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2
Physical specifications
  • 4
Products, models, variants
Brand name(s)
  • Xeon 35xx
  • Core i7-9xx (except 970, 980, 980X and 990X)

Bloomfield is the code name for Intel high-end desktop processors sold as Core i7-9xx and single-processor servers sold as Xeon 35xx., [1] [2] [3] 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 (family 6, model 26) 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.



Bloomfield has many new features that represent significant changes from Yorkfield:

Brand names

Brand nameModel (list)MarketClock frequency range QuickPath Interface
Core i7 i7-9xx Performance Desktop2.66–3.20 GHz1× 4.8 GT/s
i7-9xx Extreme Edition Extreme Desktop3.2–3.33 GHz1× 6.4 GT/s
Xeon W35xx Server2.4–3.2 GHz4.8–6.4 GT/s

Processor cores

Core i7
Model [8]
nm Cores
Clocks (GHz)Clock
controller [1] [2] [3]
Thermal design power
Core Uncore BaseCore Uncore
i7-920 45 nm 4 (8)2.662.130.1332016284256 kB L2/core
8 MB shared L3
3× DDR3-800/1,066 MT/s1× 4.8 GT/s130 W LGA 1366 2008-11-17
i7-950 [9] 3.06232009-06-03
i7-960 [10] 3.20242009-10-18
i7-965 Extreme Edition3.202.66209991× 6.4 GT/s2008-11-17
i7-975 Extreme Edition [9] [11] 3.33252009-06-03



The process of overclocking the Bloomfield architecture is similar to that of the AMD architecture due to the on-die MCH. [19] Over-clocking will be possible with the 900 series and a motherboard equipped with the X58 chipset. In early October 2008, reports surfaced that it will not be possible to use "performance" DDR3 DIMMs that require voltages higher than 1.65v, because the integrated memory controller within the Core i7 will be damaged. [20]

Bloomfield has three memory channels, and the channel bandwidth can be selected by setting the memory multiplier. However, in early benchmarks, when the clock rate is set higher than a threshold (1333 for the 965XE) the processor will only access two memory channels simultaneously. A 965XE has higher memory throughput with 3xDDR3-1333 than with 3xDDR3-1600, and 2xDDR3-1600 has almost identical throughput to 3xDDR3-1333.[ citation needed ]


The Core i7 Bloomfield does not support error-correcting memory. [1] [2] [3] Some motherboards with an LGA 1366 socket support both Core i7 and the Xeon 35xx and 55xx series processors, and advertise support for ECC memory. [21] [22] However ECC functionality is only available if a Xeon is installed, not if a Core i7 is installed.

Product evolution

The Core i7 950 and the Core i7 975 Extreme Edition were introduced in March 2009 with prices similar to the prices for the 940 and 965 Extreme Edition, respectively, but with better performance in each case. Intel has scheduled the discontinuation of the 940 and 965XE for Q3 2009. [23] [24] [25] Intel announced discontinuations in other older families at the same time. [26]

See also

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