[bspkumar]

I would like to know the factors that limits the max size of RAM and Hard disk and how they are calculated.

Thank you.

[seahwk83]

32 bit systems can see and access 3.2gb memory even if more is installed
64 fit systems can access above and beyond 4gb

Here some info also
http://www.breakitdownblog.com/is-64...should-i-care/

http://social.technet.microsoft.com/...6-77055582eff6

[bspkumar]

Thank you for the reply.

I have already calculated the max size of the RAM using binary method. But,

2^32 = 4294967296 bits
4 Gb = 4294967296 bytes ( 8 * 4294967296 )

?

[KISS]

You can see some of the address limits of the various processors here: Intel Microprocessor Quick Reference Guide - Product Family

In reality, it depends on how many bits were implemented, not how many are available.

For hard disks, you had n 512 byte sectors that could be addressed. As the drives got bigger, the 512 or clustersize had to get bigger, then eventually the fundamental file system had to change.