790FX chipset features

The AMD 790FX supports Advanced clock calibration (ACC). Am I correct this feature has no benefit to Phenom II X4 CPUs since their cores are already unlocked?

Also, that same chipset supports AutoXpress. I know that the MemBoost feature of AutoXpress works for DDR2 memory, according to the the Wikipedia article: http://en.wikipedia.org/wiki/AMD_700_chipset_series#AutoXpress. Does MemBoost have any effect on DDR3 memory?

Thanks.
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More about 790fx chipset features
  1. ACC allows the overclocker better control over the whole setup, whether the cores are locked or not.
  2. r_manic said:
    ACC allows the overclocker better control over the whole setup, whether the cores are locked or not.


    Thanks for the reply. Does anyone have an answer to the AutoXpress question I asked?
  3. Does anyone know if AutoXpress has benefits for DDR3 memory?
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