I believe PC2-6400 RAM will default to PC2-5300 on Dell XPS410 MOBO default is PC2-5300.

I'm refurbishing a Dell XPS Dimension 410 Desktop.
I bought a Crucial dual kit PC2-6400 (2 X 1GB).
Each slot supports 1GB.

I'm sure this memory will be supported as it will
default to the slower speed of PC2-5300.
The voltage of the Crucial (faster) RAM is the same as
the default RAM: 1.8v & both are Class 6.

I bought the faster RAM as it gets cheaper to go faster than the
limited supply of older/slower.
I could return the new RAM is there is an issue.

Dell & Crucial state that this MOBO supports only PC2-5300.

Any conflict here if I only install the Crucial PC2-6400?
Please advise..
Thanks, Jim
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dbruntonQuid, Me Anxius Sum?  Illegitimi non carborundum.Commented:
No conflict.

It will drop down.  See http://en.wikipedia.org/wiki/DDR2_SDRAM#Backward_compatibility and note the comments about bus running slower.
MikeIT ProfessionalCommented:
You should have no issue.
dbruntonQuid, Me Anxius Sum?  Illegitimi non carborundum.Commented:
And see Crucial here http://www.crucial.com/upgrade/Dell-memory/XPS/XPS+410-upgrades.html on memory for your machine.

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Gary CaseRetiredCommented:
No conflict at all ... as you already know ["... I'm sure this memory will be supported as it will
default to the slower speed of PC2-5300."]  :-)

In fact, if you look at the Crucial page for this system, and click on the "Show all compatible computer memory" button, you'll see that they list some PC2-6400 modules.
jamesg1940Author Commented:
somehow when I visited Crucial, before asking E-E, that page didn't offer other
compatibles except different PC2-5300 amounts of MB. Or I didn't see the option.
The page I saw stated clearly that 667 was what is required. I knew better.
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