I have installed server 2003 enterprise R2 with SP2 on 2 HP Proliant DL 380 G5 servers running as a cluster, both servers have resently been upgraded to 8 GB RAM The problem is that the OS do not see more than 3.5 GB RAM, I wonder how to fix so the os can se all 8 GB RAM. The bios is seeing the Ram fine and ram checks come back fine. Is there any reason why the OS wont see the additional memory?
Thanks
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Opps a couple of typo's
This queestion has been discussed here many times - its a limitation of 32bit OSs. While the theoretical limit is 4Gb some of the address space is used to control I/O and the PCI bus. The result is that the OS cannot see more than 3.25-3.75Gb of ram when 4Gb is installed. If you want to use all the memory the only solution is to use a 64bit machine with a 64bit OS
More info at http://www.brianmadden.com
Exchange 2003 32 bit won't use the relocated RAM anyway, http://support.microsoft.c
There is a BIOS setting that affects it, under Advanced then CPU called Data Execution Prevention I think, that should be turned on. Also turn on Intel virtualization here. Finally you may have turned on RAM mirroring but you'd still see 4GB if the PAE kernel was loaded.
SP2 enables PAE by default, is there a /NOPAE flag in boot.ini or a /MAXMEM flag?
According to http://support.microsoft.c
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by: KCTSPosted on 2007-09-19 at 04:39:40ID: 19919702
This queestion has been discussed here many times - its a limitation of 32bit OSs. While the theoretical limit is 4Gb some of the address spaced is used to control I/O and the PCI bus. the result is that the OS cannot see more than 3.25-3.75Gb of ram even when 4Gb is installed. If tou want to use all the momory the only solution is to use a 64bit machine with a 64bit OS
More info at http://www.brianmadden.com