Ubuntu: Ubuntu does not detects the RAM correctly



Question:

I have 512MB RAM in my PC. Ubuntu detects only 495 MiB. How can I fix this?

On Debian Squeeze, I have 512MB.(The correct size)

OS: Ubuntu 12.04 Precise Pangolin


Solution:1

Your RAM is detected correctly. MB (megabyte) and MiB (mebibyte) are two different units.

  • 1 MB is 1000 KB which is 1000 byte (decimal)
  • 1 MiB is 1024 KiB which is 1024 byte (binary)

If you check the math yourself you will see that 512 MB are 495 MiB ;-)

MB is mostly used for selling stuff because it's the higher number. In your Ubuntu system you will mostly encounter MiB (or GiB).


Solution:2

a) At startup, the BIOS counts the number of working RAM-bytes, but EXCLUDES the ram-bank used for the test. That difference is fully normal. -- b) Any faulty RAM-bank is neither used nor counted. In that case, the computer can still be used for non-important jobs.


Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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