On Sunday 26 August 2007 11:28, Vivek J. Patankar wrote: > Dave Stevens wrote: > > I am running FC6 x86_64 on an ASUS socket 939 motherboard. I have > > installed 2x1g DDR2-400 chips and 2x512meg DDR2-400. This is a total of 3 > > gigs but I consistently get a report of 2500 megs of installed RAM. > > Anyone able to suggest why this is? > > Check the output of 'dmesg'. On my system I get... > > Memory: 408940k/490432k available (2362k kernel code, 81104k > reserved, 1399k data, 312k init) > > If the available memory detected is not what is physically installed, > lines above or below should tell you why. Like in my case, I have 64MB > missing due to an issue I have never been able to resolve. The relevant > lines in 'dmesg' in my case are... > > Aperture too small (32 MB) > Your BIOS doesn't leave a aperture memory hole > Please enable the IOMMU option in the BIOS setup > This costs you 64 MB of RAM > Mapping aperture over 65536 KB of RAM @ 4000000 > Memory: 408940k/490432k available (2362k kernel code, 81104k > reserved, 1399k data, 312k init) > > -- > Regards, > विवेक ज. पाटणकर (Vivek J. Patankar) > > Registered Linux User #374218 > Fedora release 7 (Moonshine) > Linux 2.6.22.4-65.fc7 x86_64 Thanks very much, see dmesg excerpt below. I get: Checking aperture... CPU 0: aperture @ 1f2000000 size 32 MB Aperture too small (32 MB) No AGP bridge found Memory: 2550204k/2604800k available (2374k kernel code, 54208k reserved, 1560k data, 204k init) but it isn't clear to me what this means or what (if anything) can be done. Dave -- The modern conservative is engaged in one of man's oldest exercises in moral philosophy; that is, the search for a superior moral justification for selfishness." - John Kenneth Galbraith
