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Memory

• Cache
  • L1 on chip (L1 & L2 on Pentium Pro)
  • Synchronous vs. asynchronous SRAM
  • L2 typically 0 to 512 KBytes
• Main Memory (DRAM)
  • Typically 60ns - 70ns DRAM SIMM or DIMM
  • Cost < $10 per MByte
  • 2 or 4 way interleaving?
  • "Enhanced" DRAMs: EDO, SDRAM, etc.
• "Even the slowest DRAM is faster than disk."