8 GB Kit ( 2 x 4 GB Modules ) | DDR3 1333MHz ( PC3-10600 / PC3-10600U ) | DDR3 DIMM ( 240-Pin ) | Non-ECC UDIMM ( Unbuffered DIMM ) | 1Rx8 or 2Rx8 - (Single Rank x8 or Dual Rank x8) | 1.5V or 1.35V. Speed 1333MHz, PC3-10600 / PC3-10600U.
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