[rescue] E3000 RAM install rules?

[Patrick Finnegan]

You don't need to match memory (or cpus) on different boards. They do have
to match in the same bank but I think that's all.

Patrick Finnegan

On Thu, Dec 11, 2025, 19:41 Steve Hatle via rescue <rescue at sunhelp.org>
wrote:

> It's been a while and I'm trying to remember the rules for RAM in the
> E3000 with multiple CPU boards.
>
> I have three CPU boards but the RAM I have on hand (some 32MB and some
> 128MB SIMMs) aren't enough to fill bank 0 across all three boards.
>
> I could fill bank 0 across two boards, and fill bank 1 across two
> boards, but can I run the third CPU board with no RAM in it, or does at
> least bank 1 have to have RAM? I assume that bank 0 on the third board
> would have to be the same size as what's in bank 1 of board 1 and 2.
>
> To put it another way, I have 16 128M sticks, so I can fill bank 0 of
> boards 1 and 2, and I have 16 32MB sticks, so I can do the second bank
> of boards 1 and 2, but I don't have enough of either to also fill bank 0
> of board 3. Can board 3 function without RAM in it, or do I have to fill
> at least all of bank 0 across all three boards?
>
> I've been looking through various Sun doc and I can't (yet) find a
> definite answer. My gut tells me I have to cross all three boards with
> at least bank 0.
>
> Anyone have some cheap SIMMs? Or maybe I should just be happy with two
> boards and not try to pimp up a machine that is more a labor of love
> than anything else :-)
>
> Thanks,
>
> Steve
>
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>
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