Re: Dim 8250 Memory

I'll be picky about one little tiny detail. From my experience with the
Dimension 8250 and the very similar Precision 350, if the CPU has a 533MHz FSB,
then only the PC800-40 memory will work. PC800-45 simply causes the usual POST
beeps and won't run. At least, those were my emperical observations about 18
months ago when I got a bunch of them in from a company that was acquired.

PC1066 continues to carry a premium price over PC800, even at thsi late date,
because so little was produced... Ben Myers

On Mon, 28 May 2007 16:18:55 -0400, Barry Watzman <WatzmanNOSPAM@xxxxxxxxxx>
wrote:

This model was shipped with both memory types. If the CPU has a 400MHz
FSB, then PC800 will work fine. If the FSB of the CPU is 533MHz, then
you should use PC1066 memory (PC800 will work but will slow down the
system). PC1066 memory is backwards compatible and will also work with
a 400MHz FSB (it's not required, and it will not improve performance,
but it will work). When buying memory, be sure that you get the 16-bit
wide RDRAM with 184-pin sockets and not the 32-bit wide type with
232-pin sockets (the latter have contacts in the center of the module
between the two notches).

At this point, there probably is not a lot of price difference between
PC800 and PC1066, the issue is just finding them. The best source
really is used modules on E-Bay.

I would not recommend mixing PC800 and PC1066 modules; it should work,
but I'd be uncomfortable with it.

If you fill all 4 sockets, you will be removing two "C-RIMM" terminator
modules. Do not discard these, you may need them in the future.

Your upgrade options are to add two 128MB modules (that would take you
to 512) or to add two 256 MB modules (that would take you to 768MB).


GTS wrote:
My client has a Dimension 8250 533MHz bus with two 128M PC1066 RDRAM
modules. We want to upgrade this to 512M. The specs I've seen for this
machine say it uses PC800 RAM so it's odd that it has the PC1066
modules. Can anyone confirm the specs?

Since PC1066 RIMMS are very expensive and harder to find, if it really
is designed for PC800 I'm considering getting PC800 for the upgrade and
mixing the two. I believe it shouldn't be a problem to fill the other 2
slots with these and that there shouldn't be an compatibility issue,
i.e. it will all run at the PC800 rating. Is that correct?
Thanks.

.

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