LGA 771

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Socket J (LGA 771)
Release dateMay 16, 2006; 19 years ago (2006-05-16)
Designed byIntel
Manufactured byIntel
TypeLand Grid Array (LGA)
Chip form factorsFlip chip land grid array
Contacts771
FSB protocolAGTL+
FSB frequency667 MT/s, 1066 MT/s, 1333 MT/s, 1600 MT/s
Voltage rangeVaries (1,3625V max)
Processor dimensions37.5 × 37.5 mm
ProcessorsIntel Celeron 445
Intel Core 2 Duo E6x05
Intel Dual-Core Xeon E/X/L 50xx–52xx
Intel Quad-Core Xeon X 33xx
Intel Quad-Core Xeon E/X/L 53xx–54xx
Intel Core 2 Extreme QX9775
PredecessorSocket 604
VariantLGA 775 (Socket T)
SuccessorLGA 1366
Memory supportDDR2, DDR3
This article is part of the CPU socket series

LGA 771, also known as Socket J, is a CPU interface introduced by Intel in 2006.[1] It is used in Intel Core microarchitecture and NetBurst microarchitecture (Dempsey) based DP-capable server processors, the Dual-Core Xeon is codenamed Dempsey, Woodcrest, and Wolfdale and the Quad-Core processors Clovertown, Harpertown, and Yorkfield-CL. It is also used for the Core 2 Extreme QX9775, and blade servers designated under Conroe-CL.

It was succeeded by LGA 1366 for the Nehalem-based Xeon processors.

Technical specifications

[edit]
A Xeon E5450 modified to fit in LGA 775 motherboards.

As its name implies, it is a land grid array with 771 contacts. The socket has 771 protruding spring-loaded pins which touch the lands on the underside of the microprocessor.

The "J" in "Socket J" refers to the now-canceled processor codenamed "Jayhawk", which was expected to debut alongside this interface. It is intended as a successor to Socket 604 and takes much of its design from LGA 775 and is almost pin compatible with LGA 775.

Compared to LGA 775 CPUs, LGA 771 CPUs are rotated 90 degrees and have two pins swapped. Small adapters developed by Chinese computer DIY enthusiasts are available to allow LGA 771 CPUs to be installed in LGA 775 motherboards, if the BIOS microcode supports them (but it is also possible to add supporting microcode manually).[2] This also allows for overclocking of Xeon (LGA 771) processors when used in the correct (LGA 775) motherboards. Some overclockers have managed quite substantial overclocks such as 4.023GHz on a Xeon X5492 for a total overclock of just over 18%.[3]

Single core processors

[edit]
NameCoresFrequencyL2 CacheTDPFSBRelease datePrice
Xeon 3000 series
Xeon L301412.40 GHz3 MB30W1066Q1 2008OEM
Celeron 400 series
Celeron 44511.87 GHz512 KB65W1066OEM

Dual core processors

[edit]
  • Hyper-threading supported only on 50xx series processors(codenamed Dempsey)
NameCoresFrequencyL2 CacheTDPFSBRelease datePrice
Xeon 5000 series
Xeon 503022.66 GHz2*2 MB95W667
Xeon 50402.83 GHz
Xeon 50503.00 GHz
Xeon 50603.20 GHz130W1066
Xeon 50633.20 GHz95W
Xeon 50703.46 GHz130W
Xeon 50803.73 GHz130W
Xeon 3100 series
Xeon E311323.00 GHz6 MB65W1333Q3 2008OEM
Xeon 5100 series
Xeon 511021.60 GHz4 MB65W1066
Xeon 51201.86 GHz1066
Xeon 51302.00 GHz1333Q2 2006
Xeon 51402.33 GHz
Xeon LV 51482.33 GHz40W
Xeon 51502.66 GHz65W
Xeon 51603.00 GHz80W
Xeon 5200 series
Xeon E520521.86 GHz6 MB65W1066
Xeon E52202.33 GHz1333
Xeon L521521.86 GHz6 MB20W1066
Xeon L52403.00 GHz40W1333
Xeon X526023.33 GHz6 MB80W1333Q4 2007
Xeon X52703.50 GHz1333Q3 2008
Xeon X52723.40 GHz1600Q4 2007
Intel Xeon 5140 processor. Compatible with LGA 771 motherboards. It has two cores at 2.33 GHz, 4 MB of L2 cache, an FSB speed of 1333 MT/s and a TDP of 65 W.[4]

Quad core processors

[edit]
NameCoresFrequencyL2 CacheTDPFSBRelease datePrice
Xeon 3300 Series
Xeon X332342.50 GHz6 MB80W1333Q1 2008OEM
Xeon X33532.67 GHz12 MB
Xeon X33632.83 GHz
Xeon 5300 series
Xeon E531041.60 GHz8 MB80W1066Q4 2006
Xeon E53201.86 GHz
Xeon E53352.00 GHz1333Q1 2007
Xeon E53452.33 GHz
Xeon L531041.60 GHz8 MB50W1066Q1 2007
Xeon L53181.60 GHz40W
Xeon L53201.86 GHz50W
Xeon L53352.00 GHz50W1333Q3 2007
Xeon X535542.66 GHz8 MB120W1333Q4 2006
Xeon X53653.00 GHz150WQ3 2007
Xeon 5400 series
Xeon E540542.00 GHz12 MB80W1333Q4 2007
Xeon E54102.33 GHz
Xeon E54202.50 GHz
Xeon E54302.66 GHz
Xeon E54402.83 GHzQ1 2008
Xeon E54503.00 GHzQ4 2007
Xeon E54622.80 GHz1600
Xeon E54723.00 GHz1600
Xeon L5408[5]42.13 GHz12 MB40W1066Q1 2008
Xeon L54102.33 GHz50W1333
Xeon L54202.50 GHz
Xeon L54302.66 GHzQ3 2008
Xeon X545043.00 GHz12 MB120W1333Q4 2007
Xeon X54603.16 GHz
Xeon X54703.33 GHzQ3 2008
Xeon X54723.00 GHz1600Q4 2007
Xeon X54823.20 GHz150W
Xeon X54923.40 GHzQ3 2008
Core 2 Extreme QX9000 series
QX977543.20 GHz12 MB150W1600Q1 2008

See also

[edit]

References

[edit]
  1. ^ "Intel® Socket Test Technology for LGA771". Intel. Retrieved June 29, 2016.
  2. ^ omega552003 (August 29, 2024). "[How To] Using a LGA 771 Xeon in a LGA 775 motherboard AKA 771 mod". linustechtips.com. Retrieved August 29, 2024.{{cite web}}: CS1 maint: numeric names: authors list (link)
  3. ^ "Intel Xeon X5492 @ HWBOT". HWBOT. Retrieved November 30, 2022.
  4. ^ "Intel® Xeon® Processor 5140 (4M Cache, 2.33 GHz, 1333 MHz FSB) Specifications". Retrieved July 28, 2016.
  5. ^ "Intel® Xeon® Processor L5408 (12M Cache, 2.13 GHz, 1066 MHz FSB) Product Specifications". Intel® ARK (Product Specs). Retrieved September 9, 2017.
Retrieved from "https://en.wikipedia.org/w/index.php?title=LGA_771&oldid=1317241022"

    Socket J (LGA 771)
    Release dateMay 16, 2006; 19 years ago (2006-05-16)
    Designed byIntel
    Manufactured byIntel
    TypeLand Grid Array (LGA)
    Chip form factorsFlip chip land grid array
    Contacts771
    FSB protocolAGTL+
    FSB frequency667 MT/s, 1066 MT/s, 1333 MT/s, 1600 MT/s
    Voltage rangeVaries (1,3625V max)
    Processor dimensions37.5 × 37.5 mm
    ProcessorsIntel Celeron 445
    Intel Core 2 Duo E6x05
    Intel Dual-Core Xeon E/X/L 50xx–52xx
    Intel Quad-Core Xeon X 33xx
    Intel Quad-Core Xeon E/X/L 53xx–54xx
    Intel Core 2 Extreme QX9775
    PredecessorSocket 604
    VariantLGA 775 (Socket T)
    SuccessorLGA 1366
    Memory supportDDR2, DDR3
    This article is part of the CPU socket series

    LGA 771, also known as Socket J, is a CPU interface introduced by Intel in 2006.[1] It is used in Intel Core microarchitecture and NetBurst microarchitecture (Dempsey) based DP-capable server processors, the Dual-Core Xeon is codenamed Dempsey, Woodcrest, and Wolfdale and the Quad-Core processors Clovertown, Harpertown, and Yorkfield-CL. It is also used for the Core 2 Extreme QX9775, and blade servers designated under Conroe-CL.

    It was succeeded by LGA 1366 for the Nehalem-based Xeon processors.

    Technical specifications

    A Xeon E5450 modified to fit in LGA 775 motherboards.

    As its name implies, it is a land grid array with 771 contacts. The socket has 771 protruding spring-loaded pins which touch the lands on the underside of the microprocessor.

    The "J" in "Socket J" refers to the now-canceled processor codenamed "Jayhawk", which was expected to debut alongside this interface. It is intended as a successor to Socket 604 and takes much of its design from LGA 775 and is almost pin compatible with LGA 775.

    Compared to LGA 775 CPUs, LGA 771 CPUs are rotated 90 degrees and have two pins swapped. Small adapters developed by Chinese computer DIY enthusiasts are available to allow LGA 771 CPUs to be installed in LGA 775 motherboards, if the BIOS microcode supports them (but it is also possible to add supporting microcode manually).[2] This also allows for overclocking of Xeon (LGA 771) processors when used in the correct (LGA 775) motherboards. Some overclockers have managed quite substantial overclocks such as 4.023GHz on a Xeon X5492 for a total overclock of just over 18%.[3]

    Single core processors

    NameCoresFrequencyL2 CacheTDPFSBRelease datePrice
    Xeon 3000 series
    Xeon L301412.40 GHz3 MB30W1066Q1 2008OEM
    Celeron 400 series
    Celeron 44511.87 GHz512 KB65W1066OEM

    Dual core processors

    • Hyper-threading supported only on 50xx series processors(codenamed Dempsey)
    NameCoresFrequencyL2 CacheTDPFSBRelease datePrice
    Xeon 5000 series
    Xeon 503022.66 GHz2*2 MB95W667
    Xeon 50402.83 GHz
    Xeon 50503.00 GHz
    Xeon 50603.20 GHz130W1066
    Xeon 50633.20 GHz95W
    Xeon 50703.46 GHz130W
    Xeon 50803.73 GHz130W
    Xeon 3100 series
    Xeon E311323.00 GHz6 MB65W1333Q3 2008OEM
    Xeon 5100 series
    Xeon 511021.60 GHz4 MB65W1066
    Xeon 51201.86 GHz1066
    Xeon 51302.00 GHz1333Q2 2006
    Xeon 51402.33 GHz
    Xeon LV 51482.33 GHz40W
    Xeon 51502.66 GHz65W
    Xeon 51603.00 GHz80W
    Xeon 5200 series
    Xeon E520521.86 GHz6 MB65W1066
    Xeon E52202.33 GHz1333
    Xeon L521521.86 GHz6 MB20W1066
    Xeon L52403.00 GHz40W1333
    Xeon X526023.33 GHz6 MB80W1333Q4 2007
    Xeon X52703.50 GHz1333Q3 2008
    Xeon X52723.40 GHz1600Q4 2007
    Intel Xeon 5140 processor. Compatible with LGA 771 motherboards. It has two cores at 2.33 GHz, 4 MB of L2 cache, an FSB speed of 1333 MT/s and a TDP of 65 W.[4]

    Quad core processors

    NameCoresFrequencyL2 CacheTDPFSBRelease datePrice
    Xeon 3300 Series
    Xeon X332342.50 GHz6 MB80W1333Q1 2008OEM
    Xeon X33532.67 GHz12 MB
    Xeon X33632.83 GHz
    Xeon 5300 series
    Xeon E531041.60 GHz8 MB80W1066Q4 2006
    Xeon E53201.86 GHz
    Xeon E53352.00 GHz1333Q1 2007
    Xeon E53452.33 GHz
    Xeon L531041.60 GHz8 MB50W1066Q1 2007
    Xeon L53181.60 GHz40W
    Xeon L53201.86 GHz50W
    Xeon L53352.00 GHz50W1333Q3 2007
    Xeon X535542.66 GHz8 MB120W1333Q4 2006
    Xeon X53653.00 GHz150WQ3 2007
    Xeon 5400 series
    Xeon E540542.00 GHz12 MB80W1333Q4 2007
    Xeon E54102.33 GHz
    Xeon E54202.50 GHz
    Xeon E54302.66 GHz
    Xeon E54402.83 GHzQ1 2008
    Xeon E54503.00 GHzQ4 2007
    Xeon E54622.80 GHz1600
    Xeon E54723.00 GHz1600
    Xeon L5408[5]42.13 GHz12 MB40W1066Q1 2008
    Xeon L54102.33 GHz50W1333
    Xeon L54202.50 GHz
    Xeon L54302.66 GHzQ3 2008
    Xeon X545043.00 GHz12 MB120W1333Q4 2007
    Xeon X54603.16 GHz
    Xeon X54703.33 GHzQ3 2008
    Xeon X54723.00 GHz1600Q4 2007
    Xeon X54823.20 GHz150W
    Xeon X54923.40 GHzQ3 2008
    Core 2 Extreme QX9000 series
    QX977543.20 GHz12 MB150W1600Q1 2008

    See also

    References

    1. ^ "Intel® Socket Test Technology for LGA771". Intel. Retrieved June 29, 2016.
    2. ^ omega552003 (August 29, 2024). "[How To] Using a LGA 771 Xeon in a LGA 775 motherboard AKA 771 mod". linustechtips.com. Retrieved August 29, 2024.{{cite web}}: CS1 maint: numeric names: authors list (link)
    3. ^ "Intel Xeon X5492 @ HWBOT". HWBOT. Retrieved November 30, 2022.
    4. ^ "Intel® Xeon® Processor 5140 (4M Cache, 2.33 GHz, 1333 MHz FSB) Specifications". Retrieved July 28, 2016.
    5. ^ "Intel® Xeon® Processor L5408 (12M Cache, 2.13 GHz, 1066 MHz FSB) Product Specifications". Intel® ARK (Product Specs). Retrieved September 9, 2017.
    Retrieved from "https://en.wikipedia.org/w/index.php?title=LGA_771&oldid=1317241022"