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Thread: Unlocking cores and L3 on X3 and X4 Athlon II CPU's

  1. #1
    Xtreme Member
    Join Date
    Apr 2007

    Unlocking cores and L3 on X3 and X4 Athlon II CPU's

    AMD this summer was launched Athlon II series of cheap quad and triple core CPU’s. However, many of them share the same origin like much more expensive Phenom II CPU’s.
    Athlon II X3 and X4 was made at two different masks. Dependent of series, Athlon II 620, or 630 on their heatspreaders may have AADAC or AACYC stepping codes. Third character in this stepping mark means the origin of the core or mask. If you have character D, this is the Propus L3 cacheless core. If you are lucky enugh, and you chose character C, this core is from Deneb mask, and this Propus, or Rana is locked version of Phenom II. If you are lucky, and if you have SB710 or SB750 board, locked core and extra 6MB L3 cache can be unlocked.
    However, also if you choose AACYC or familiar code, it may be case that you have unstable part, with defective L3 cache, and/or unlocked core.
    Also if you get AADAC Athlon II X3, you can unlock fourth core, because it is Propus based X3.
    This one has L3 cache:

    and this one hasn’t:

    unlocking with GA770-UD3P board:

    die shot of Athlon II X3 with AACYC code:

    die shot of Propus based Athlon II X4 – AADAC code:

    cache influence on K10 uArchitecture:
    "That which does not kill you only makes you stronger." ---Friedrich Nietzsche

  2. #2
    Xtreme Addict
    Join Date
    Jan 2008
    Vancouver,British Columbia, Canada
    So these (without L3) were already made in April -looking at
    the production date ( 0917) - why wait till now (4 months) for the official
    "release" from AMD ?

    Have you tried both of these CPU or these are someone elses?

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