AMD Instinct MI300X product page footnote - 5.325 TB/s memory bandwidth derivation (VERBATIM)
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sources/vb-amd-mi300x-footnote-memory-bandwidth-derivationNotes
VERBATIM: 'The AMD Instinct MI300X OAM accelerator 750W (192 GB HBM3) designed with AMD CDNA 3 5nm FinFet process technology resulted in 192 GB HBM3 memory capacity and 5.325 TFLOPS peak theoretical memory bandwidth performance. MI300X memory bus interface is 8,192 and memory data rate is 5.2 Gbps for total peak memory bandwidth of 5.325 TB/s (8,192 bits memory bus interface * 5.2 Gbps memory data rate/8).' Footnote is dated 'calculations conducted by AMD Performance Labs as of November 17, 2023'. Confirms the record's memory_bandwidth_basis derivation verbatim. Note AMD's own print is 5.325 TB/s while the spec table rounds to 5.3 TB/s; the record stores 5300 GB/s with the basis string spelling out the 5324.8 arithmetic, so the rounding is disclosed rather than hidden - correct handling. AMD's own body text contains the typo '5.325 TFLOPS peak theoretical memory bandwidth' (bandwidth labelled TFLOPS); the 5.325 TB/s restatement immediately after is the intended one. Also note the footnote is an AMD Performance Labs CALCULATION, not a measurement.
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