GX280 and 4GB memory

Question

GX280 with BIOS A08.

All 4GB from 2 matched pairs of

1 GB modules recognized by the BIOS.

Neither Win nor Linux get more than

3 GB.

I realize that space is taken up for

PCI/VGA allocation but 1 GB is excessive.

When will Dell bring out A09?

(There are anyway Intel microcode updates)

(The server 2850 had this problem before

a BIOS upgrade)

From Linux boot -

<6>BIOS-provided physical RAM map:
<4> BIOS-e820: 0000000000000000 - 00000000000a0000 (usable)
<4> BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
<4> BIOS-e820: 0000000000100000 - 00000000bf686c00 (usable)
<4> BIOS-e820: 00000000bf686c00 - 00000000bf688c00 (ACPI NVS)
<4> BIOS-e820: 00000000bf688c00 - 00000000bf68ac00 (ACPI data)
<4> BIOS-e820: 00000000bf68ac00 - 00000000c0000000 (reserved)
<4> BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
<4> BIOS-e820: 00000000fec00000 - 00000000fed00400 (reserved)
<4> BIOS-e820: 00000000fed20000 - 00000000feda0000 (reserved)
<4> BIOS-e820: 00000000fee00000 - 00000000fef00000 (reserved)
<4> BIOS-e820: 00000000ffb00000 - 0000000100000000 (reserved)

Margit

Dennise458 · Answer

Here is some information about this. You could consider upgrading to an x64 version of your OS. This should allow seeing the whole 4GB.

Margitsw · Answer

This is from a 64-bit Linux :-) (And the MTRR addresses are quite clear)   :-)   (I have a Intel 650 on the board)   Message Edited by Margitsw on 06-04-2007 09:03 AM

stonent · Answer

http://www.spack.org/wiki/LinuxRamLimits

Margitsw · Answer

That link is 6 (!) years old and applies to kernel 2.4. We are talking current 2.6 and x86_64 here. The BIOS is only making ca. 3GB visible to the OS.

Margitsw · Answer

Note that

BIOS problem in that the space between
0Xbf686c00 and 0X100000000 is BIOS reserved.
Difference between these is (decimal)
1083675648 bytes ! :-)

Message Edited by Margitsw on 06-09-2007 07:43 AM

Locked Topics – Desktops General

GX280 and 4GB memory

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