ACTi CMS 2 - Manual (Page 15)

www.acti.com
CMS 2.0 System Administrator’s Manual
15
*3 Please use 64-bit system if your computer has more than 4GB RAM. Microsoft Windows
operating system has limits on memory and address space, regardless of the real or virtual
memory available on a particular computer. Take Windows 7 Professional for example, the
maximum physical memory for a 32-bit(X86) system can address is 3.5 GB even though 16
GB of RAM has been installed on this computer . Therefore, if you consider increasing the
computer’s multi-tasking capability by adding more RAM, you will need a 64-bit version of
Windows to take advantage of it all.
Please visit the link below for more memory limitations on various Windows platforms.
http://msdn.microsoft.com/en-us/library/aa366778%28VS.85%29.aspx#physical_memory_l
imits_windows_7
Besides the limitation mentioned above, you may find the usable memory displayed on
 Computer  Properties is still less than actual installed memory.
This is a common symptoms of all Windows platforms, please find explanations and
solutions in this Windows official support document
http://support.microsoft.com/kb/978610/en-us and
http://windows.microsoft.com/en-us/windows7/taking-the-mystery-out-of-64-bit-windows
*4 Please make sure your operating system is fully patched with the latest service packs.