The best replacement for ddr is sdram.

The best alternatives to ddr are rated as following:
★★★★★  sdram
★★★★★  ddr2
★★★  gddr
★★★  dimm
★★★  ddr2 memory
★★  ddr3
★★  sdr
★★  ddr2 ram
★  just dance
★  ddr1
★  itg
★  ddr
★  ddr3l
★  lpddr
★  pc2
★  brd
  gdr
  ddr sdram
  ddr2 sodimm
  czech german shepherd
  sodimm
  rdram
  rambus
  ddrii
  in the groove
  sd ram
  gddr5
  guitar hero
  ecc
  ddr dual channel
  gddr3
  sdram memory
  sram
  pc2700 ddr

Your alternative for ddr is not listed? Suggest!
Speaking about ddr, one probably shouldn't forget about ddr2.

Other search terms related to ddr and their ratings are:
★★★★★ ddr2
★★ dance pad
You have in mind a companion for ddr and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of ddr in all years. Click on graph for more.
ddr
sdram
ddr2