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How to calculate the bandwidth and data rate of GDDR5 and GDDR6


  • Example:​

  • [1650 GDDR5]​

  • *Data Rate (Gbps/pin) = Clock Frequency (MHz) × 4 ​

  • 8 Gbps/pin = 2000 MHz X 4​

  • *Bandwidth (GB/s) = (Data Rate per Pin (Gbps/pin) × Memory Bus Width (bit))/ 8 (bits/Byte)​

  • 128 GB/s = 8 Gbps/pin X 128 bit/8 bits/Byte​

     

  • Example:​

  • [4060 GDDR6]​

  • *Data Rate (Gbps/pin) = Clock Frequency (MHz) × 8 ​

  • 17 Gbps/pin = 2125 MHz X 8​

  • *Bandwidth (GB/s) = (Data Rate per Pin (Gbps/pin) × Memory Bus Width (bit))/ 8 (bits/Byte) ​

  • 272 GB/s = 17 Gbps/pin X 128 bit/8 bits/Byte​

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