Difference between 2 types of memory chips
Posted 19 October 2008 - 02:22 PM
Posted 20 October 2008 - 06:47 AM
You cannot order 333MHz DDR PC2-4200 RAM, this is a complete mixup of specifications.
- You can have 333MHz DDR RAM, this is very old now, and is also called PC-2700.
- You can order PC2-4200 RAM, which is a more recent version (DDRII), this runs at 533MHz. I'm pretty sure this is what they sent you.
Using the old (working) RAM, click here and run the system scanner from Crucial. It will complete and tell you what type of memory your computer has.
Judging by the looks of some research, the Pavilion DV 4000 series notebooks came with either PC-2700 or PC2-4200. You need to find out which one you have (the Crucial scanner may tell you), by looking in the documentation that came with your computer.
If, after finding out why type your computer takes, you find you have received the correct RAM, then you may have received a DOA set, and need to organise a replacement with the retailer.
Be sure to report back with your findings.
Posted 20 October 2008 - 02:38 PM
They shouldn't be compatible. DDR2 does not physically fit into a DDR slot (in my experience) They're keyed differently so that they can't be combined.
Posted 20 October 2008 - 07:17 PM
Judging from my research, HP shipped out that model with either one or the other RAM installed. (Which would mean motherboard compatibility also).
I guess it was luck of the draw.
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