LGA 1155/1156 Desktop PC CPU Socket - Molex

    LGA 1155/1156 Desktop PC CPU Socket

    The Molex LGA 1155 and LGA 1156 Processor Sockets meet Intel specifications for reliable CPU installation features and connectivity in energy-efficient desktop PCs


    Known as Socket H2, the LGA 1155 CPU socket is used with Intel’s “2nd Generation Core* i7/i5/i3 series” of desktop microprocessors codenamed Sandy Bridge. This 1155-circuit socket is a replacement of its predecessor – the LGA 1156 Socket (or Socket H1) – which mates with the Nehalem* processor. Sandy Bridge* is a hallmark of Intel’s 32nm microarchitecture technology with highly acclaimed features of “breakthrough performance and capabilities”.

    With identical pitch size of 0.9144mm (.036"); I/O, power and ground contacts for the processors they mate to; and a grid array of 40 by 40 with 24 by 16 grid depopulation in the center of the array, the LGA 1156 and LGA 1155 sockets have contacts arranged in two opposing L-shaped patterns within the grid array for maintenance of electrical contact under processor-load conditions. The sockets have lead-free solder balls on the underside for surface mounting on the motherboard and use an Independent Loading Mechanism (ILM) to seat the processor onto the socket.

    The LGA1155 and LGA1156-based processors are not compatible between sockets due to electrical, mechanical, and keying differences. Besides their different Alignment Post Void configurations, the distance from the center of the alignment post to the socket center has shifted from 9.0mm (.354") for Socket H1, to 11.5mm (.453") for Socket H2. Molex’s newly released LGA 1155 socket assemblies and new LGA 1156 product extensions, come in 15 and 30 micron gold-plating contact versions. These sockets have a common alignment-key height of 2.10mm (.083") to accommodate an additional (and optional) ILM pick-and-place cover.

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    LGA 1155/1156 Processor Socket

    Selection Matrix (images are for reference only)

    Known as Socket H2, the LGA 1155 CPU socket is used with Intel’s “2nd Generation Core* i7/i5/i3 series” of desktop microprocessors codenamed Sandy Bridge. This 1155-circuit socket is a replacement of its predecessor – the LGA 1156 Socket (or Socket H1) – which mates with the Nehalem* processor. Sandy Bridge* is a hallmark of Intel’s 32nm microarchitecture technology with highly acclaimed features of “breakthrough performance and capabilities”.

    With identical pitch size of 0.9144mm (.036"); I/O, power and ground contacts for the processors they mate to; and a grid array of 40 by 40 with 24 by 16 grid depopulation in the center of the array, the LGA 1156 and LGA 1155 sockets have contacts arranged in two opposing L-shaped patterns within the grid array for maintenance of electrical contact under processor-load conditions. The sockets have lead-free solder balls on the underside for surface mounting on the motherboard and use an Independent Loading Mechanism (ILM) to seat the processor onto the socket.

    The LGA1155 and LGA1156-based processors are not compatible between sockets due to electrical, mechanical, and keying differences. Besides their different Alignment Post Void configurations, the distance from the center of the alignment post to the socket center has shifted from 9.0mm (.354") for Socket H1, to 11.5mm (.453") for Socket H2. Molex’s newly released LGA 1155 socket assemblies and new LGA 1156 product extensions, come in 15 and 30 micron gold-plating contact versions. These sockets have a common alignment-key height of 2.10mm (.083") to accommodate an additional (and optional) ILM pick-and-place cover.

    High-temperature thermoplastic housingAble to withstand lead-free processing temperatures
    Pick-and-place cover and JEDEC hard tray packagingFacilitates automation socket placement
    LGA contact with BGA solderPrevents CPU misalignment
    Lead-free BGA solder ballsCompliant with environmental requirements
    Shepherd-hook or straight type actuation leverStraight lever design for space-saving advantages; shepherd-hook for easy actuation
    Easy and visible triangle pin 1 identification on housing, pick-and-place cover, load plate, 4 alignment walls and 2 orientation postsAll ensure correct CPU loading

    Consumer

    • Desktop

    Networking

    • Workstations
    *This is not a definitive list of applications for this product. It represents some of the more common uses.

    Intel, Nehalem, Sandy Bridge, LGA 1155 (Socket H2), LGA 1156 (Socket H1), ILM, Core™ i-series (Core i3/i5/i7) and relevant names are either trademarks or registered trademarks of Intel Corporation