168 pins are used on SDRAM DIMM. 184 pins are used on DDR DIMM. There are either 30 pins or 72 pins used on SIMM. 184 pins are used on RIMM.
A DIMM is based on two different pin counts. SDRAM has 168 pins and is an earlier generation of RAM. DDR RAM has 184 pins. Both are considered DIMMS.
DDR
No, they're not cross compatible. 184pin DDR is desktop memory, 200 pin ddr is a SO-DIMM, which is laptop memory.
The DDR DIMM is an older type of RAM. DDR DIMM is not compatible with other kinds of RAM which is why a person that has an older PC has to choose a DDR DIMM memory as a replacement for one that broke.
One.
686 pins
DDR SDRAM uses 184 pins.
1 offset
enough
ddr dimm is not compatible with the ddr 2 because of the notches. the different notch positions will keep you form installing it.
240