old systems ram in new machine

[my_computer]

my old machine had 2 x 250mb sticks of Nanya ram. my new machine has 2 x 1gb Geil . shall i put it in and hope for the best? I have a feeling that i can't do any damage and if it conflicts i can just take it out and carry on as i am now, or if this not the case and damage could be a result?

 

[my_computer]

searched a number on it and think its this

256MB 240p PC2-3200 CL3 4c 32x16 DDR2-400 DIMM T007, Nanya, ADZ, NT256T64UH4A0FY-5A
Description:
NT256T64UH4A0FY-5A ADZ 256MB 240p PC2-3200 CL3 4c 32x16 DDR2-400 DIMM T007, Nanya


ddr2 then, but not worth bothering with?