2.66" 200-pin SO-DIMM contains DDR2 SDRAM. One notch is near the side of the module.
2.66" 189-pin SO-DIMM contains DDR SDRAM 2.66" 189-pin SO-DIMM contains DDR2 SDRAM 2.66" 145-pin SO-DIMM contains SDRAM 2.35" 40-pin SO-DIMMs (outdated) 130-pin SO-RIMM (conatains Rambus memory and has two notches).
You're computer will require a "DDR2 SDRAM DIMM". DDR2 SDRAM is the type of memory you are after, it is also a DIMM. Most modern memory are all DIMM's (Dual inline memory module), much older ram were SIMMS (single ingline memory module). DIMM refers more to the physical make up of the module (DIMMS have contacts on both sides of the module). So any DDR2 SDRAM that you buy IS a dimm. You may want to look at the wikipedia page about DDR2 SDRAM at http://en.wikipedia.org/wiki/DDR2_SDRAM
Variants of DIMM slots support DDR, DDR2 and DDR3 RAM. The most common types of DIMMs are: 72-pin SO-DIMM (not the same as a 72-pin SIMM), used for FPM DRAM and EDO DRAM. 100-pin DIMM, used for printer SDRAM.
Variants of DIMM slots support DDR, DDR2 and DDR3 RAM. The most common types of DIMMs are: 72-pin SO-DIMM (not the same as a 72-pin SIMM), used for FPM DRAM and EDO DRAM. 100-pin DIMM, used for printer SDRAM.
DIMM. Two types of DIMMs: a 168-pin SDRAM module (top) and a 184-pin DDR SDRAM module (bottom). Note that the SDRAM module has two notches (rectangular cuts or incisions) on the bottom edge, while the DDR1 SDRAM module has only one.
DDR
184-pin DIMM
168-pin SDRAM DIMM
168-pin SDRAM168-pin DIMM30 or 72-pin SIMM 184, 168 or 232-pin RIMM
The largest size DDR2 DIM sold today (2013) is a 244-pin MiniDIMM. It is used for DDR2 SDRAM. Currently, the fastest speed on a DDR2 DIM is 1066 MHz.
2.66" 200-pin DDR2 SDRAM 2.66" 200-pin DDR SDRAM 2.66" 144-pin SDRAM 2.35" 72-pin FPM or EDO