single
DDR2 RAM is slightly smaller and has square chips. DDR1 RAM has rectangular chips.
DDR1 RAM typically has 184 pins and a notch located closer to the center. DDR2 RAM has 240 pins and a notch positioned more towards one side. You can also look at the labeling on the RAM module itself to identify whether it is DDR1 or DDR2.
There is no difference, except that your computer will be using two ram slots, instead of just one.
The difference between DDR1 ram and DDR2 ram, is the advancement in technology. When you upgrade to DDR2, you are doubling the amount of flow information that can take place.
that depends on wether the ram is DDR1, DDR2 OR DDR3 RAM
DDR by a long shot
PC133 is an SDRAM standard. SDRAM is a type of RAM.
No
ddr1 and ddr2
open it up a look.
it means DOUBLE DATA RAM WITH 1GB
There are both the same thing, ddr2 ram, is faster that ddr1 ram but ddr3 ram is more modern and faster