What about Bandwidth?

• 2.2GBytes/s claimed for 192 bit path

  • 17.6Gb/s / 192 = 96 Mhz access rate!
    • Voodoo2 cards actually use 90Mhz onboard bus speed.

• Also claimed “interleaved memory”

  • Have to use multiple banks to interleave
  • If use multiple banks, then using 4Mb DRAMs
    • 256K x 16

• Still 12 chips in a bank

  • 12 chips * 4 Mb = 48 Mb per bank
    • Two banks of 48 Mb => 96 Mb => 12 MB
  • So Guess #2 = 24 chips.

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