[SLE] Cannot install 9.3 or 10.0 with 4GB ram, 2GB fine



I have the following setup

Motherboard Epox 9NPA Ultra (nforce4 chiopset)
CPU Athlon 64 3200 Venice Core (Socket 939)
Memory 4 1GB sticks of Rosewill DDR 400
Lite-On DVD-RW
4 Hitachi 80GB SATA II drives
nvidia Geforce 6200 video card.

The computer is a server for a small office. Currently running SuSE 9.3 and
vmware workstation 5.5. Windows Small business server (no choice here) runs
as a virtual machine.

I had problems right from the beginning with 4GB ram, so I used just 2GB to
get things up and running. I want to stress that this combination with 2 GB
RAM has been completely stable and has run fine for 6 months.

With all 4 GB installed the machine will not start Suse, nor can I do an
install. Tried again yesterday and today.

I flashed the BIOS to the latest version, dated 12/9/05. I then ran the
MemTest included with SuSE 10.0 for 13 hours and did 9 full passes with no
memory errors. I then tried to boot the currently installed 9.3. It does
fine for part of the boot up process and then hangs. It gets to the part
that says press Esc for more information, and I press escape and it
identifies hardware and continues booting. It doesn't always hand at the
same place, but it never reaches the KDE login screen. I take out the 2 GB
of RAM and it boots and runs fine.

I then tried to install SuSE 10.0. It boots from the DVD, I press
installation, it gets to the language screen fine, and gets tot he hardware
screen and begins probing for hardware. nce it hung on probing for floppy
disks, the next time it hung on probing IDE. I thne tried installation with
ACPI disabled and it hung even earlier. I then tried the Safe Mode
installation and that also hung. I then went back tot he 9.3 DVD and that
hung on installation.

I then removed the 2 GB of Ram and it boots fine and is now happily running.

What is curious is that when I enter the BIOS setup it acknowledges all 4 GB
of ram. The POST screen, however, says checking memory and indicates only
2.8 GB of Ram.

I think I read somewhere that the memory controller of the Athlon 64 (Socket
939) differs from the Opteron (Socket 940), and perhaps that is the problem.

Would a dual core 939 cpu eliminate this problem? Any suggestions would be
appreciated. I would like to use all 4 GB of RAM because I want to give more
memory to the SQL Server on the Windows machine, plus run another virtual
machine. This is part of a server consolidation project.

Mike

--
Michael A. Coan
Woodlawn Foundation
524 North Avenue, Suite 203
New Rochelle, NY 10801-3410
Tel 914-632-3778
Fax 914-632-5502

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