The best replacement for 2gb is 4gb.

The best alternatives to 2gb are rated as following:
★★★★★  4gb
★★★★  4gb ram
★★  3gb
★★  4gb vram
★★  3gb video card
★★  4gb gtx 770
★★  4gb 770
★★  4gb gtx 760
★  4gb video card
★  4gb memory
★  4gb 760
★  3gb ram
★  1gb graphics card
★  4gb graphics card
★  1gb
★  512mb
★  4gb gpu
  1gb video card
  4gb of ram
  4gb gtx 680
  200mb
  4gb macbook air
  3gb vram
  256mb
  4 gb
  5gb
  4gb graphics
  4gb sli
  3gb gpu
  300mb
  200 mb
  3gb 660 ti
  1gb memory
  4gb gtx 670
  2mb
  1gb ram
  2048mb
  4gb windows 7
  64mb
  3gb graphics card
  4gb r9 270x
  128mb
  250mb

Your alternative for 2gb is not listed? Suggest!
Speaking about 2gb, one probably shouldn't forget about alan jones.

Other search terms related to 2gb and their ratings are:
★★★★★ alan jones
★★★ 1gb
★★ 1gb crossfire
★★ 1gb ram
★ r4
★ 4gb
★ 1gb 6950
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Google Trends

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2gb
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