2 Replies Latest reply on Oct 8, 2009 9:08 AM by Javed Lodhi

    An issue with Intel D865PERL


      I'm using the Intel D865PERL motherboard and I just bought some extra RAM sticks, namely 4GB of OCZ Platinum 2-3-2-5... The issue is that POST and Windows detect only 3.25 GB of RAM... why is that?

        • 1. Re: An issue with Intel D865PERL


          This is normal. It is somehting to do with memory being reserved for hardware... have a look at the following link, it.'s for vista but applies to XP too: http://support.microsoft.com/kb/929605/en-us


          Hope this helps.

          • 2. Re: An issue with Intel D865PERL
            Javed Lodhi

            Hi Mos,

            You can only see 3.25GM of RAM because any 32-Bit OS from Microsoft by default does not support memory beyond 3 or 3.2GB max. You either go with 64-Bit OS to utilize 4GB memory or if you want to use 32-Bit OS, you go with either of the fixes that I am stating below:


            1- Extend your OS Physical Address allocation manually via command line to support RAM more than 3GB. I would refer you Microsoft's support page here for Physical Address Extension so that you can not only understand what the glitch with Microsoft's 32-Bit OSes is but also learn how to resolve it.

            Also refer to this: Enable 4GB RAM in 32-bit Windows Vista.


            2- The other way is, there are patches available for Windows XP/Vista and Windows 7 by Microsoft to resolve memory extension issue. These patches are availble for free on Microsoft's website.


            Hope this helps. Thank you, have a nice day!


            Warm Regards,

            Javed Lodhi

            Intel Go Green, Save The Environment!