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From: Larry Gusaas on 14 Feb 2010 17:49
On 2010/02/14 4:04 PM Mike Lane wrote:
> I don't understand this.
>
> My Mac Pro instruction's specifically state, 'DIMMs must be installed in
> equal-sized pairs', and this is what I have done. How is it that you have
> installed a single DIMM?
>

He has a newer Mac Pro than you. Things change.

--
Larry I. Gusaas
Moose Jaw, Saskatchewan Canada
Website: http://larry-gusaas.com
"An artist is never ahead of his time but most people are far behind theirs." - Edgard Varese

From: Neill Massello on 14 Feb 2010 17:50
Mike Lane <mike.lane.usenet(a)ntlworld.co.uk> wrote:

> My Mac Pro instruction's specifically state, 'DIMMs must be installed in
> equal-sized pairs', and this is what I have done. How is it that you have
> installed a single DIMM?

Because the memory controller changed with the Nehalem processors used
in the 2009 models.

From: Mike Lane on 14 Feb 2010 18:14
Neill Massello wrote on Feb 14, 2010:

> Mike Lane <mike.lane.usenet(a)ntlworld.co.uk> wrote:
>
>> My Mac Pro instruction's specifically state, 'DIMMs must be installed in
>> equal-sized pairs', and this is what I have done. How is it that you have
>> installed a single DIMM?
>
> Because the memory controller changed with the Nehalem processors used
> in the 2009 models.
>

OK, thanks.

--
Mike Lane
UK North Yorkshire
email: mike_lane at mac dot com

From: Mike Rosenberg on 14 Feb 2010 18:49
Mike Lane <mike.lane.usenet(a)ntlworld.co.uk> wrote:

> > Not so with the Mac Pro line. Mine came with two 1 GB DIMMs installed
> > and I added a 4 GB DIMM. Figuring out the correct locations on my own
> > would have taken too much trial and error since it was counter-intuitive
> > for me.
>
> I don't understand this.
>
> My Mac Pro instruction's specifically state, 'DIMMs must be installed in
> equal-sized pairs', and this is what I have done. How is it that you have
> installed a single DIMM?

It turns out I haven't. I added a pair of 2 GB DIMMs and made the
mistake of trusting _my_ memory when I posted instead of looking it up.

And that suggests what the OP's problem may be.

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From: JF Mezei on 14 Feb 2010 21:15
Mike Lane wrote:

> My Mac Pro instruction's specifically state, 'DIMMs must be installed in
> equal-sized pairs', and this is what I have done. How is it that you have
> installed a single DIMM?

Mine didn't say that. However, perhaps one might need 4gig in slot 1,
leave slot 2 empty, and then put 1gig in slots 3 and 4. Putting 1gig in
slot 2 would have unequal memory in slots 1 and 2.

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