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.
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
