Bus Speed: PC4-17000 (DDR4-2133) / PC4-19200 (DDR4-2400) / PC4-21300 (DDR4-2666) / PC4-25600 (DDR4-3200). Crucial 8 GB DDR4 2133 2400 2666 3200 MHz SO-DIMM 2Rx8 288Pin Desktop Speicher. 8GB DDR4 2133MHZ = PC4-17000 8GB x1.
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