2.66" 200-pin SO-DIMM contains DDR2 SDRAM. One
notch is near the side of the module.
The DDR2 PC2-5300 has 240 pins
Here's what I found out for you. The DDR3 has 240 pins just like the DDR2, however, they will not be compatible, you will not be able to put a DDR3 into a DDR2 slot. The knotch on the stick of RAM is in a different location so it will not fit. So a new motherboard made for DDR3 will have to be used. They are currently out on the MAC Lite computers but not sure if Microsoft has any on the market yet. The DDR3 will use 1.5V, which is lower than the DDR2 1.8V.
It is not hard to install the 2GB DDR2 SO-DIMM in your Acer laptop.
Yes, the 2GB DDR2 SO-DIMM is specifically for Acer laptops.
so-dimms ddr2
ddr1 184 pins ddr2 240 pins ddr3 240 pins there are 240 pins one side 120 pins and other side 120 pins so 120+120 = 240 pins in ddr2 ram. as well as ddr3 has 240 pins and ddr1 has 184 pins only . by Prem verma from www.prem-verma.blogspot.com
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
DDR2 and DDR3 are both 240 pin DIMM. They have a special notch so as to keep you from putting one where the other belongs.
Computer uses Memory installed on DIMM Slots on Motherboards.Nowadays different versions of DDR RAMs are used (DDR1, DDR2 & DDR3).Laptops use similar memories (DDR1, DDR2 & DDR3) but in small form of DIMM Sockets called Small Outline Dual Inline Memory Modules (SO-DIMM) memories.
There is a notch that prevents installation, even though the modules are the same size and have the same number of pins. Notch position between DDR and DDR2 are diferent. Also, the memory socket on a motherboard is diferent for all types of memories. If the memory socket is design for DDR you can't put any other memory type but DDR and so for all other types.
2.66" 204-pin SO-DIMM contains DDR3 memory. The one notch on the module is offset from the center of the module.
DDR, DDR2, SDR, DDR3, DDR4. SO-dimm are for laptops
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.