[newbie] Strange memory problem!

[Vegas]

Hello from Russia! :) Guys i am new to the linux but i am gonna learn
it  as  much  as  i  can.I  alredy have two Mandrake 7 comps and have
solved any troubles that happend to me.But on another one Celeron 450
128  meg  ECC  SDRAM  (one  chip)  Creative  Infra 48X i do have some
strange things.First Mandrake setup is going in the text mode all the
way  till  the  end and i am getting 16MB of ram! Is there any config
files or i have to recompile the kernel? With best wishes,Vegas.