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SubjectRe: Hardware Problem - Asus A8N-VM CSM


Langsdorf, Mark wrote:
>>> The problem. 2 out of the 4 sees all 4 gigs of ram. The other 2 see
>>> only 2.8 gigs of ram. And it's hardware related because in the bios
>>> setup the ones that show 2.8 show it in the bios.
>>>
>>> The motherboards were not prchased at the same time. All have
>>> different brands of ram. And the processors are different.
>>> The 2 that don't see all the ram are the newest ones.
>>>
>>> I tried swapping ram between one that saw 2.8 gigs and one
>>> that saw 4 gigs and the problem stays with the motherboard.
>>> I haven't yet swapped out the processors.
>>>
>>> So - I'm a little stumped. Can someone point me in the
>>> right direction?
>>>
>
> Usually, missing memory comes from the PCI I/O hole, or the
> IOMMU/AGP/framebuffer overlays. Does your BIOS have an
> options for creating a memory hole or hoisting memory? If
> so, are the settings between the 4G machines different from
> the 2.8G machines?
>
> Also, do you have an IOMMU aperture enabled and if so, how
> large?
>
> Are there any hardware differences between the systems, like
> different AGP or PCI graphics cards?
>
>
>> Answering my own question perhaps. Could it be related to
>> whether or not the processor is a "revision e" chip?
>>
>
> Possibly, but I'd expect the RevE parts to see more DRAM than
> the earlier parts.
>
>
>

I fixed the problem. It wasn't a Revision E issue after all. I just
pulled the battery and when it came up clean it saw all the memory.
Thanks for your help.

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