The best replacement for dram is sdram.

The best alternatives to dram are rated as following:
★★★★★  sdram
★★★★  sram
★★★  gram
★★★  flash
★★★  nand
★★  flash ssd
★  dimm
★  ram
★  flash memory
★  sram faster
  nand memory
  ddr2
  pound sterling
  dram

Your alternative for dram is not listed? Suggest!
Speaking about dram, one probably shouldn't forget about sram.

Other search terms related to dram and their ratings are:
★★★★★ sram
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Google Trends

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dram
sdram
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