ddr2 memory in ddr slot?

  • Thread starter Thread starter Flark
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Flark

Hi folks,

Just curious but is DDR2 merely faster or is there
a real difference in how it operates compared to DDR?
I have an extra DDR2 SODIMM and hope to use it in
a DDR SODIMM slot.

Thanks.
 
Flark said:
Hi folks,

Just curious but is DDR2 merely faster or is there
a real difference in how it operates compared to DDR?
I have an extra DDR2 SODIMM and hope to use it in
a DDR SODIMM slot.

Thanks.
Click to expand...

A significant difference, is a different operating voltage.
DDR is 2.5V or 2.6V, while DDR2 is 1.8V. No need to
smoke it.

DDR2 has programmable on-die termination (ODT), which is
a difference when compared to DDR. DDR relies on
some resistors located on the motherboard. I think
in both cases, the termination scheme is described as
SSTL.

http://en.wikipedia.org/wiki/Stub_Series_Terminated_Logic

If you look around, you can probably find a highly
technical tutorial, comparing the two technologies.
The ones here, aren't exactly what I'm looking for.

http://www.micron.com/products/dram/ddr2/technotes

The main reason for creating new memory technologies,
is to make money for the memory companies. If that
did not happen, a lot of the companies would go
bankrupt. DDR3 is what is helping to keep some of
them afloat. They cannot be making a lot of money
on DDR2, as it is dirt cheap.

Paul
 
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