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    SubjectRe: 4Gb memory?
    On Mon, 27 Oct 2003, Hakona Spect wrote:

    > Hi, I just installed 4GB memory to my system. In BIOS it shows up all 8x512M
    > chips. But after boot it shows:
    >
    > $ free
    > total used free shared buffers cached
    > Mem: 3753328 566800 3186528 0 96040 189960
    > -/+ buffers/cache: 280800 3472528
    > Swap: 2096440 0 2096440
    >
    > $dmesg
    > Linux version 2.4.22 (root) (gcc version 3.2.2 20030222 (Red Hat Linux
    > 3.2.2-5)) #1 SMP Mon Oct 27 12:44:16 EST 2003
    > BIOS-provided physical RAM map:
    > BIOS-e820: 0000000000000000 - 00000000000a0000 (usable)
    > BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
    > BIOS-e820: 0000000000100000 - 000000007ff77000 (usable)
    > BIOS-e820: 000000007ff77000 - 000000007ff79000 (ACPI NVS)
    > BIOS-e820: 000000007ff79000 - 00000000e7f77000 (usable)
    > BIOS-e820: 00000000e7f79000 - 00000000e8000000 (reserved)
    > BIOS-e820: 00000000fec00000 - 00000000fec10000 (reserved)
    > BIOS-e820: 00000000fee00000 - 00000000fee10000 (reserved)
    > BIOS-e820: 00000000ffb00000 - 0000000100000000 (reserved)
    > user-defined physical RAM map:
    > user: 0000000000000000 - 00000000000a0000 (usable)
    > user: 00000000000f0000 - 0000000000100000 (reserved)
    > user: 0000000000100000 - 000000007ff77000 (usable)
    > user: 000000007ff77000 - 000000007ff79000 (ACPI NVS)
    > user: 000000007ff79000 - 00000000e7f77000 (usable)
    > user: 00000000e7f79000 - 00000000e8000000 (reserved)
    > user: 00000000fec00000 - 00000000fec10000 (reserved)
    > user: 00000000fee00000 - 00000000fee10000 (reserved)
    > user: 00000000ffb00000 - 0000000100000000 (reserved)
    > 2815MB HIGHMEM available.
    > 896MB LOWMEM available.

    Which motherboard? Some boards will reserve some of the area between ~3.7
    and 4G for various option roms and other devices present in the system.
    Resulting in "lost" physical RAM.

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