Memory Ram

This motherboard supports up to 4 GB of RAM.  As previously noted it won't use it without a 64 bit operating system but it has nothing to do with memory caching.

32 bit Windows (or Linux) by design will only use a maximum of 2 GB of RAM due to the way the memory manager is designed.  To do the math, 32 bits in binary equates to roughly 4 gig in decimal.  If you want to use more than that you can adjust an option in the boot.ini file that will allow you to use 3 GB but no more without upgrading to 64 bit.  Furthermore 32 bit Windows dedicates 2 GB to the OS and another 2 GB to applications.  The boot.ini option reallocates 1 of the 2 GB from the OS to the application space.

The user manual is here if you would like a copy:  http://www.helpowl.com/manual.php?file=8371b1edaa9d5a1c2c36afb1f334555b&manual=207911

Make sure you have the correct type and size of RAM installed.

The following info is taken from the user manual:

• 4 DDRII DIMM memory slots (supports up to 4 GB memory) (Note 1)
• Supports dual channel DDRII 667/533/400 unbuffered DIMMs (Note 2)
• Supports 1.8V DDRII DIMMs

(Note 1) Due to standard PC architecture, a certain amount of memory is reserved for system usage
and therefore the actual memory size is less than the stated amount. For example, 4 GB of
memory size will instead be shown as 3.xx GB memory during system startup.
(Note 2) To use a DDRII 667 memory module on the motherboard, you must install a 1066/800 MHz
FSB processor.

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Licenses & Certifications: Microsoft, Cisco, VMware, Novell, FCC RF & Amateur Radio licensed.

32-bit systems require a memory cache. This means you will never see proper RAM. Only a 64-bit system can fully utilize ALL RAM and show it.