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Nehalem

Nehalem


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    : Mar 2009
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    17 Nehalem

    Nehalem
    Nehalem
    Nehalem
    Nehalem


     

     


    Nehalem .








    triple-channel integrated memory controller
    three cache levels
    hyperthreading
    quickpath .


    Nehalem codename .








    • ****d on Intel Core microarchitecture.
    • Two to eight cores.
    • Integrated DDR3 triple-channel memory controller.
    • Individual 256 KB L2 memory caches for each core.
    • 8 MB L3 memory cache.
    • New SSE 4.2 instruction set, with the addition of seven new instructions for string and **** processing, collectively called Application Target Accelerators.
    • Two-way simultaneous multi-threading (SMT).
    • Enhancements on the microarchitecture (4-way dispatch unit).
    • Enhancements on the prediction unit, with the addition of a second Branch Target Buffer (BTB).
    • A second 512-entry Translation Look-aside Buffer (TLB).
    • Improved virtualization performance.
    • New QuickPath external bus (two links per CPU socket).
    • 45 nm manufacturing technology.






    Nehalem 45


    cache
    AMD

    L2 256
    L3 shared 8

    L1 Core 2 Duo









    Core 2 Duo L2

    shared

    Core 2 Quad Core 2 Extreme
    L2































    :










    The Socket

    With an integrated memory controller, Intel needed a new pinout for Nehalem and the first version with three 64-bit DDR3 memory channels features a 1366-pin LGA interface:

    LGA-1366 (left) vs. LGA-775 (right)
    The socket is noticeably bigger than LGA-775 as is the mounting area for heatsinks. You can't reuse LGA-775 heatsinks and instead must use a heatsink with mounting holes more spread apart. As far as we can tell, the same push-pin mounting mechanism from LGA-775 is present in Nehalem which is disappointing.
    With a larger socket and more pins, the CPU itself is obviously bigger. Here's a shot of our Nehalem compared to a Core 2 Duo E8500:

    Nehalem (left) vs. Penryn (right)

    Nehalem (left) vs. Penryn (right)



























































    Power Consumption





    : Nehalem || : memo || :

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