8GB 1866MHz KIT = (2PCSX4GB )1866 MHz. 16GB 1866MHz KIT = (2PCSX8GB )1866 MHz. Main Frequency: 1333MHz / 1600MHz / 1866MHz. DDR3 Dual Channel Kit. 16GB 1333MHz KIT = (2PCSX8GB )1333 MHz. 16GB 1600MHz KIT = (2PCSX8GB )1600 MHz.
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