A7V8X-MX and PC3200 BIOS settings

P

Phill Danks

I recently bought two 512 Meg DDR PC3200 strips of Kingston memory for the
board above.
There's an AMD XP2400+ processor and a FX6800 onboard.
Firstly the memory is running at 333 not 400 , I can't see any way of
setting the frequency to 200 rather than 133 or 166 .
Also the system has become very unstable.
I'm getting occasional blue screens due to memory leaks and recently video
has started crapping out, leaving the system running otherwise.
Can anyone suggest where/how I can make sure my BIOS settings are correct?
It's award version 1008.
I'd settle for stability over performance right now !
Thanks,
 
V

Venom

Put your ram in slots 1 and 3 for starters.
That board is only 333 at best and disable your onboard video and use a
suitable agp video card and you should be ok.
 
P

Phill Danks

Thanks for the reply.
Actually there are only two memory slots on the board.
The onboard video is disabled and the FX6800 is running at AGP x 8.
It's only the new memory that changed.
 
P

Paul

"Phill Danks" said:
I recently bought two 512 Meg DDR PC3200 strips of Kingston memory for the
board above.
There's an AMD XP2400+ processor and a FX6800 onboard.
Firstly the memory is running at 333 not 400 , I can't see any way of
setting the frequency to 200 rather than 133 or 166 .
Also the system has become very unstable.
I'm getting occasional blue screens due to memory leaks and recently video
has started crapping out, leaving the system running otherwise.
Can anyone suggest where/how I can make sure my BIOS settings are correct?
It's award version 1008.
I'd settle for stability over performance right now !
Thanks,

I think a 2400+ is 15x133 = 2000MHz. It is probably best to run
the memory at DDR266 (memory clock = 133), so the memory
and FSB run synchronous. If the Northbridge design removes
resync flops when run synchronous, the reduction in latency
makes up for the lower operating frequency. In other words, you
might not be losing that much by turning down the memory clock.

Set the memory to [Auto by SPD], then boot up Windows and
check with CPUZ, as to what settings the board is using.
That is one way to get the info from the DIMM. With the Kingston
RAM, it is likely 3-3-3 RAM at DDR400, and when run at DDR266,
the timings should become 2-2-2. Once you know what the SPD
timings are, you can use [Manual], and you can relax the timing
by increasing the settings by one notch (i.e. increase CAS by 0.5,
increase Trcd by 1 etc.). You should test with memtest86+
(memtest.org) a couple of passes after each adjustment, to see
whether you are making any progress.

One thing missing from your board, are adjustable voltages.
I don't see an adjustment for Vagp or Vdimm. Sometimes a little
tweak on those makes all the difference.

You could try cranking down the AGP rate a notch. Go from 8X
to 4X, and see if the video is any better. Fast write is
probably already disabled, but check the setting anyway.

How long have you had the 6800 ? You might want to check the
PSU voltages, by using the BIOS hardware monitor or Asus Probe
in Windows. See whether the supply voltages are within 5% of
their nominal values. If +5 or +12 is on the low side, that
might be enough to make the video card malfunction. It is
possible the video card is failing, but to consider whether that
is a likely possibility, I would want to search Google using
the brand and model number to see if other people have had
issues.

Paul
 

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