DDR4 memory comes in 288-pin DIMM modules.
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.
2.66" 200-pin SO-DIMM contains DDR2 SDRAM. One notch is near the side of the module.
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.
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
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.
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.
The pins on each side are separated straight down the center. So logically the pins operate independently on processes and are 2X faster because of this. DIMM (Dual Inline Memory Module)
depending on the laptop, it could be DDR, DDR2 or DDR3. But the form factor is all the same. Its all SO-DIMM memory
No, they're not cross compatible. 184pin DDR is desktop memory, 200 pin ddr is a SO-DIMM, which is laptop memory.
There are several different formats of RAM, including different types for PCs and laptops. Laptops typically require SO-DIMM RAM, while PCs typically require some form of DIMM RAM. SO-DIMMs have a varying number of pins from 100 to 256, the number of pins relates and notch spacing relates to the memory capability. DIMMs vary in pin numbers from 72 to 284.