Can someone tell me (or link me to someplace that will explain it) why
144pin MicroDIMM (non-ddr) PC100/PC133 modules only seem to go up to
256MB? I for the life of me can't find what, if any, technical
limitation there is, and am curious if it is a technical or market
limitation that makes them only be available up to 256MB.
On 10 Oct 2006 16:49:19 -0700, "Ethics Forge" <lokkju@gmail.com> wrote:
Quote:
Can someone tell me (or link me to someplace that will explain it) why144pin MicroDIMM (non-ddr) PC100/PC133 modules only seem to go up to256MB? I for the life of me can't find what, if any, technicallimitation there is, and am curious if it is a technical or marketlimitation that makes them only be available up to 256MB.
Umm, they do go up to 512MB - check out www.crucial.com for SO-DIMMs,
assuming that's what you meant. Some mfrs may have just decided not to go
to the bother of the special chip packaging for 265M-bit chips or doing
SO-DIMMs using the 512M-bit chips... hardly a volume market.
No, I said, and I meant, MicroDIMM - it is smaller then SO-DIMM, and
generally used in subnotebooks
George Macdonald wrote:
Quote:
On 10 Oct 2006 16:49:19 -0700, "Ethics Forge" <lokkju@gmail.com> wrote:
Quote:
Can someone tell me (or link me to someplace that will explain it) why144pin MicroDIMM (non-ddr) PC100/PC133 modules only seem to go up to256MB? I for the life of me can't find what, if any, technicallimitation there is, and am curious if it is a technical or marketlimitation that makes them only be available up to 256MB.
Umm, they do go up to 512MB - check out www.crucial.com for SO-DIMMs, assuming that's what you meant. Some mfrs may have just decided not to go to the bother of the special chip packaging for 265M-bit chips or doing SO-DIMMs using the 512M-bit chips... hardly a volume market. -- Rgds, George Macdonald
On 10 Oct 2006 16:49:19 -0700, "Ethics Forge" <lokkju@gmail.com>
wrote:
Quote:
Can someone tell me (or link me to someplace that will explain it) why144pin MicroDIMM (non-ddr) PC100/PC133 modules only seem to go up to256MB? I for the life of me can't find what, if any, technicallimitation there is, and am curious if it is a technical or marketlimitation that makes them only be available up to 256MB.
I think most manufacturers just don't see much of a market for laptops
that old. So microDIMMs just don't get any bigger than whatever is the
largest at the point the technology got overtaken by DDR and now DDR2.
They just don't bother to make memory chips of higher density for the
older standard.
--
A Lost Angel, fallen from heaven
Lost in dreams, Lost in aspirations,
Lost to the world, Lost to myself
On Wed, 11 Oct 2006 12:57:06 GMT, a?n?g?e?l@lovergirl.lrigrevol.moc.com (The
little lost angel) wrote:
Quote:
On 10 Oct 2006 16:49:19 -0700, "Ethics Forge" <lokkju@gmail.com>wrote:
Quote:
Can someone tell me (or link me to someplace that will explain it) why144pin MicroDIMM (non-ddr) PC100/PC133 modules only seem to go up to256MB? I for the life of me can't find what, if any, technicallimitation there is, and am curious if it is a technical or marketlimitation that makes them only be available up to 256MB.
I think most manufacturers just don't see much of a market for laptopsthat old. So microDIMMs just don't get any bigger than whatever is thelargest at the point the technology got overtaken by DDR and now DDR2.They just don't bother to make memory chips of higher density for theolder standard.
Might be much simpler than that. Perhaps the architecture of the chipsets used
with pc100/pc133 drams simply didn't/don't support more capacity-per-dimm...
On 10 Oct 2006 22:05:33 -0700, "Ethics Forge" <lokkju@gmail.com> wrote:
Quote:
No, I said, and I meant, MicroDIMM - it is smaller then SO-DIMM, andgenerally used in subnotebooks
Sorry but I've never messed with sub-notebooks. See my 2nd sentence then:
the packaging and chips to allow this form factor at that size was at the
end of the SDRAM era.
On Wed, 11 Oct 2006 12:57:06 GMT, a?n?g?e?l@lovergirl.lrigrevol.moc.com
(The little lost angel) wrote:
Quote:
On 10 Oct 2006 16:49:19 -0700, "Ethics Forge" <lokkju@gmail.com>wrote:
Quote:
Can someone tell me (or link me to someplace that will explain it) why144pin MicroDIMM (non-ddr) PC100/PC133 modules only seem to go up to256MB? I for the life of me can't find what, if any, technicallimitation there is, and am curious if it is a technical or marketlimitation that makes them only be available up to 256MB.
I think most manufacturers just don't see much of a market for laptopsthat old. So microDIMMs just don't get any bigger than whatever is thelargest at the point the technology got overtaken by DDR and now DDR2.They just don't bother to make memory chips of higher density for theolder standard.
True about the changeover to DDR but PC-133 SDRAM 512Mb chips are available
now - apart from just the economics, I think it's more to do with the
packaging: FBGA was just being adopted for commodity DRAMs at about the
same time as DDR took over. I also recall the 512MB PC-133 SO-DIMMs I
purchased had the chips in a very strange package... looked like a blob of
asphalt glued to the DIMM substrate, 4 per side and probably would not have
fit on a MicroDimm.
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Max size limit on MicroDIMM memory modules?
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