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Memory

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January 15, 2011 6:35:16 PM

I have a Dell Dimension 4550 400 MHz computer with 256MB DDR PC2700. I purchased another 256MB DDR PC2700U & 333MHz. My computer will not start up. I had to remove the new memory chip. Is there a difference in the PC2700 and the PC2700U or is it the two different MHZ? Or both?
Thanks for any help,
Dee

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a c 226 } Memory
January 15, 2011 7:05:24 PM

The 2700u is an ECC memory designed for servers. Looks like the computer has trouble with matching it with your std DDR.

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a b } Memory
January 15, 2011 7:13:53 PM
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Your computer specs show you need DDR 333 (non-ECC) only on computers with a 533-MHz system clock speed. I couldn't find the difference in the two modules you have since you didn't post the maake/model numbers. I'm guessing the 2700U is ECC RAM (error-checking); unfortunately you cannot combine the two types of RAM - see if you can trade the 2700U for the non-ECC version from the place you got it.
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January 16, 2011 11:55:47 AM

Thank you both for your reply. I purchased it used for just a couple of dollars, no big loss. Will see if I can trade it for the non ECC. Thanks again!
January 26, 2011 12:17:22 PM

Best answer selected by countrymom.
January 26, 2011 12:18:24 PM

Thank you both for your reply. I purchased it used for just a couple of dollars, no big loss. Will see if I can trade it for the non ECC. Thanks again!
a b } Memory
January 26, 2011 3:01:03 PM

You're welcome.
!