Re: difference between DDRAM and SDRAM

20 Mar 2005 3:24 PM

General Schvantzkoph

On Tue, 06 Apr 2004 17:39:21 -0400, Pen wrote:

This is what you said, you said that DDR RAM is the same as SDRAM. Here is
your quote exactly.

>> > I think your confusion is arising from the fact that DDR ram is the
>> > same type of ram as SDRAM. The difference is in how it is used,
>> > therefore the extra 16 pins on the DIMMs. Both types of DIMMs contain
>> > SDRAM, just that the DDR ones allow the double density hookups. Don't
>> > read so much into the SDRAM being on the DDR modules.
>> >
>> >

It's not the same, it's a different architecture. I've been designing
computer systems for 30 years. I've used every generation of DRAM from the
4K generation (that's right K not M) to today's DDR RAMs. The DDR DIMMs
are larger because DDR RAMs have extra signals that aren't present on the
older SDRAMs specifically they have data strobe signals. You've obviously
never designed a CPU or a memory system, don't make statements about
things that you don't understand.

20 Mar 2005 7:44 PM

Pen

Well bully for you.
I think you must be suffering from Alzheimer's, perhaps
too much exposure to lead core solder? By deleting the
message I replied to you've destroyed the context of my post,
and really replying a year later. Unbelievable. Please let us know
who you allegedly design these memory systems for so we can
all avoid them.

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"General Schvantzkoph" <schvantzk***@yahoo.com> wrote in message
news:pan.2004.04.07.04.18.11.470023@yahoo.com...
> On Tue, 06 Apr 2004 17:39:21 -0400, Pen wrote:
>
> This is what you said, you said that DDR RAM is the same as SDRAM.
> Here is
> your quote exactly.
>
>>> > I think your confusion is arising from the fact that DDR ram is
>>> > the
>>> > same type of ram as SDRAM. The difference is in how it is used,
>>> > therefore the extra 16 pins on the DIMMs. Both types of DIMMs
>>> > contain
>>> > SDRAM, just that the DDR ones allow the double density hookups.
>>> > Don't
>>> > read so much into the SDRAM being on the DDR modules.
>>> >
>>> >
> It's not the same, it's a different architecture. I've been designing
> computer systems for 30 years. I've used every generation of DRAM from
> the
> 4K generation (that's right K not M) to today's DDR RAMs. The DDR
> DIMMs
> are larger because DDR RAMs have extra signals that aren't present on
> the
> older SDRAMs specifically they have data strobe signals. You've
> obviously
> never designed a CPU or a memory system, don't make statements about
> things that you don't understand.
>