A7N8X CPU upgrade problems

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niaxous

ASUS A7N8X2.0 ACPI BIOS Rev 1003
Phoenix-Award BIOS v6.00PG
BIOS DATE 03/19/03
AMD Duron 800 Processor upgraded to
AMD Athlon XP-A, 2079 MHz (6.25 x 333) 2800+
Barton
FSB 166
multiplier: X12.5
Core voltage 1.65 V
Zalman CPNU 7000 Cooler (close to the power supply)
Elixir Memory 512MB DDR333 PC2700
300W Power Supply
1 Maxtor 40Gb HD
Freshly installed HD
Abit FX5200
Windows 2000 Service Pack 4


I bought an new AMD 2800 XP Barton processor for my mobo but the
system is not stable
All my games and applications are shuting down and the pc restarts.
I can use the internet and do receive windows errors
I set the memory timings of my Elixir Memory to default as mentionned
in the Asus Mobo instructions but this made things worse, unable to
boot the system => Clear CMOS and all was set back to default=> 7 3 3
2.5

I then tried to change the multipliyer to lower ones but this changed
the FSB to 100 and the CPU was 1250Mhz and the POST would just freeze.
Reset it too 12.5 and the system boots up to Win2000 and the CPU would
show AMD XP 2800.
I can't figure it out problem.

In other discussion groups the members said the PSU was the problem as
it's a no-name.

Do you think that the Zalman could be the problem as it's very close
to the PSU?
Electomagnetic fields or so?

Thanks for answering my post.

See my previous discussion groups problems on :
http://www.short-media.com/forum/showthread.php?t=9431
http://hardforum.com/index.php?s=e30ee98f5b637a8de4476f18dcecf5e0

Niaxous
 
CPU external frequency = 166MHz
CPU frequency muliple = 12.5
Memory frequency = 100%(Sync)
Resulting frequency 166MHz
 
ASUS A7N8X2.0 ACPI BIOS Rev 1003
Phoenix-Award BIOS v6.00PG
BIOS DATE 03/19/03
AMD Duron 800 Processor upgraded to
AMD Athlon XP-A, 2079 MHz (6.25 x 333) 2800+
Barton
FSB 166
multiplier: X12.5
Core voltage 1.65 V
Zalman CPNU 7000 Cooler (close to the power supply)
Elixir Memory 512MB DDR333 PC2700
300W Power Supply
1 Maxtor 40Gb HD
Freshly installed HD
Abit FX5200
Windows 2000 Service Pack 4


I bought an new AMD 2800 XP Barton processor for my mobo but the
system is not stable
All my games and applications are shuting down and the pc restarts.
I can use the internet and do receive windows errors
I set the memory timings of my Elixir Memory to default as mentionned
in the Asus Mobo instructions but this made things worse, unable to
boot the system => Clear CMOS and all was set back to default=> 7 3 3
2.5

I then tried to change the multipliyer to lower ones but this changed
the FSB to 100 and the CPU was 1250Mhz and the POST would just freeze.
Reset it too 12.5 and the system boots up to Win2000 and the CPU would
show AMD XP 2800.
I can't figure it out problem.

In other discussion groups the members said the PSU was the problem as
it's a no-name.

Do you think that the Zalman could be the problem as it's very close
to the PSU?
Electomagnetic fields or so?

Thanks for answering my post.

See my previous discussion groups problems on :
http://www.short-media.com/forum/showthread.php?t=9431
http://hardforum.com/index.php?s=e30ee98f5b637a8de4476f18dcecf5e0

Niaxous
Click to expand...

If you can't get it to run (@ 1250MHz) with FSB @ 100MHz, Memory
Frequency set to 100% (in sync) and Ram timings set to Auto, then I'd
say the ram is bad or incompatible. Assuming the 300W ran the Duron 800
@800MHz(35.6W) on the board no problem the PSU should be able to handle
a Barton @ 1250MHz (41W). Either way I'd say to run at full speed you're
going to need at least a decent 350W PSU.

Cheers,
Ed
--
BTW if you switch an AMD non-SSE enabled CPU (like a 950MHz or slower
Duron) to a SSE enabled AMD CPU (Duron 1GHz and faster cores) you might
want to read this note from AMD.....

Tech Note From AMD on Athlon XP (Palomino) and Duron (Morgan) Processors
Oct-18-01

When upgrading an existing system with a new Duron (Morgan) or Athlon XP
(Palomino) processor, 2 changes need to be made.
1 - Upgrade the BIOS to fully support all the new capabilities of the
new processor including SSE instructions

2 - Reload the Operating System to properly recognize that the processor
is now capable of supporting SSE

This procedure applies to Win95/98, WinME, Win2000, WinNT, WinXP

Changing processor from AMD Athlon(T-Bird)/Duron to AMD Palomino/Morgan
(or vice-versa).

When changing processors in a Socket A platform as described in the
above bullet, it is advised to do a fresh install of the operating
system. The reason is the "operating system setup" must detect at the
time of operating system install whether the Socket A processor is a SSE
capable Palomino/Morgan or a non SSE capable T-Bird/Duron. Only at
"operating system install" can the operating system properly install
libraries and registry additions for proper processor support. A
reinstall over an old operating system install or updating from one
operating system to another operating system, after a processor is
changed as described above, will not guarantee the proper support for
that newly installed processor.

Note: If the BIOS does not provide proper support for the
processor(including SSE support for a Palomino/Morgan) at the time of
operating system install, later upgrading the BIOS to one which does
properly support all features of the processor, will require a fresh
install of the operating system.

Utilities To Confirm SSE Support

Most 3rd party processor ID utilities only confirm whether the processor
and BIOS are SSE capable thru a CPUID instruction check. This does not
mean that the operating system has the proper registry additions and
libraries installed to support the processor for optimum performance.

This issue applies mainly to the upgrade market. We do not believe this
will effect the new system market because OEM's will be setting their
BIOS correctly from the factory build process to take advantage of these
capabilities of the Duron - Morgan and Athlon - Palomino processors in
addition to loading a new install of the operating system.
 
DaveW said:
Could be an unstable under-powered power supply unit giving those symptoms.
Click to expand...
Gave up after 3 nights and gave it too my father in-law (engineer),
I'll get it all fixed-up on Saturday.
Thanks for replying anyway
 
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