My server has 128MB of PC100 SDRAM. Today, I bought a 256MB stick of PC133 SDRAM. I put it in my server’s second RAM slot. When the system booted up, it reported only 160MB of RAM in total. Upon booting into Linux,
free -m and
dmesg confirmed this tally. I took out the PC100 and tried to boot with only the new RAM. I got only a beep code, indicating a parity problem. I reverted to using only the PC100, and my server booted happily, back to having 128MB of RAM.
A bad stick of RAM? Or am I doing something dumb?