I am a novice and I need help. I am trying to upgrade my PC-100 SDRAM. I had a 64 and a 32, and I bought two PC-100 128's. I took the 32 out and put the two 128's in. I am pretty sure that the 128's that I bought were also SDRAM chips. My machine started, but I couldn't get anything to work. I would keep getting messages that each of the programs that I tried to open were having errors. Then I noticed that upon restart, when the RAM counter is going, the screen says NVRAM instead of SDRAM. I took the new RAM out and put the old back in. and everything works again. Is there anyway to make the new RAM work or do I need to return the two chips I bought and get different ones? If the latter, what type should I get? Thanks a lot.