I have a Tekram P5T30-B4E motherboard whose specs call for
3.3 Volt unbuffered SDRAM or 3.3 Volt EDO Dimms
( supports 64MB or 128MB chips, 60 or 70 ns, two available sockets )

Can I use a 5 Volt, 128MB, FPM buffered, EDO Dimm 4K (2 per bank) chip?

Thank you in advance.

Use only the RAM that's specified.

Only use 5 volt ram in a 3.3 slot if you are intending to create an excuse to build a new system. :D

Seriously, do what ski said. Even if you got lucky and did not fry your motherboard it would not work anyway.