From top to bottom: 30 Pin SIMM, 72 Pin SIMM, 168 pin DIMM, 184 pin DDR DIMM.
When upgrading your RAM, of course you can't just pull any memory off the shelf and install it in your computer. You have to pay careful attention to what type of RAM your computer needs. DIMMs are now the most common type of memory, found primarily in computers with Intel Pentium processors.
DIMM is a category of memory which includes SDRAM, DDR, DDR2, DDR3, SO-DIMM, MicroDIMM (see pin layout below)
DIMM stands for dual in-line memory module. DIMMs provide an advantage over SIMMs in that there is less redundancy, how less redundant, explain redundant due to the different connections on each side of the circuit board. add few more lines, different connections on each side to do what? DIMMs are also packaged smaller, add few more line, why DIMM can do more with less
There are several with the different varieties of DIMMS, and you must also ensure that you are choosing the right voltage. Most machines utilize the 3.3 volt unbuffered DIMMreally?. But it is still wise to check your PC manual, so that you do not make a costly mistake. Other factors to consider are the number of pins, and whether first identify or not you are using DDR, DDR2, or DDR3. The important thing to remember with DDR is that it determines your rate of data transfer.mention SO-DIMM and MICRODIMM, these are also DIMM but for laptops and small computers
Once your RAM is upgraded, you will enjoy a much more faster and responsive computer. maybe put this in RAM
Number of Pins
- 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
- 144-pin SO-DIMM, used for SDR SDRAM
- 168-pin DIMM, used for SDR SDRAM (less frequently for FPM/EDO DRAM in workstations/servers)
- 172-pin MicroDIMM, used for DDR SDRAM
- 184-pin DIMM, used for DDR SDRAM
- 200-pin SO-DIMM, used for DDR SDRAM and DDR2 SDRAM
- 214-pin MicroDIMM, used for DDR2 SDRAM
- 240-pin DIMM, used for DDR2 SDRAM, DDR3 SDRAM and FB-DIMM DRAM
Installation
condense this section
Although I mentioned that you must be careful when installing your DIMM, it is still a fairly easy process. When you open your computer case, you will see the slots that your DIMM is to be installed in. Typically, there is already a DIMM there, so you can just install your new DIMM in the next available slot. Be sure that you do not touch the gold-colored contacts on your DIMM, as this can damage the memory. The best way to ensure that this doesn't happen is to hold it at the edges.
Push down on the ejector clips on the sides of the slot where you will install your DIMM. Line up the 2 notches on the bottom of your DIMM with the 2 keys on your memory slot. Gently push your DIMM into the memory slot and the ejector clips you pushed down should now rise to a vertical position. Your memory is now installed.
Replace the cover of your case, turn on the PC, and follow any on-screen instructions. Typically, your PC will recognize the new memory. But if all you hear is a beeping sound, simply disconnect everything and try it again.
but you must be extra careful when inserting them into the motherboard. DIMM memory is the primary format for SDRAM and EDO. You will notice that when you purchase new memory, it will typically be of the SDRAM variety.
Compatibility
Available Memory Sizes
Pin Layout
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
* 144-pin SO-DIMM, used for SDR SDRAM
* 168-pin DIMM, used for SDR SDRAM (less frequently for FPM/EDO DRAM in workstations/servers)
* 172-pin MicroDIMM, used for DDR SDRAM
* 184-pin DIMM, used for DDR SDRAM
* 200-pin SO-DIMM, used for DDR SDRAM and DDR2 SDRAM
* 214-pin MicroDIMM, used for DDR2 SDRAM
* 240-pin DIMM, used for DDR2 SDRAM, DDR3 SDRAM and FB-DIMM DRAM
Speed
For various technologies, there are certain bus and device clock frequencies that are standardized. There is also a decided nomenclature for each of these speeds for each type.
SDR SDRAM DIMMs - These first synchronous registered DRAM DIMMs had the same bus frequency for data, address and control lines.
* PC66 = 66 MHz
* PC100 = 100 MHz
* PC133 = 133 MHz
DDR SDRAM (DDR1) SDRAM DIMMs - DIMMs based on Double Data Rate (DDR) DRAM have data but not the strobe at double the rate of the clock. This is achieved by clocking on both the rising and falling edge of the data strobes.
* PC1600 = 200 MHz data & strobe / 100 MHz clock for address and control
* PC2100 = 266 MHz data & strobe / 133 MHz clock for address and control
* PC2700 = 333 MHz data & strobe / 166 MHz clock for address and control
* PC3200 = 400 MHz data & strobe / 200 MHz clock for address and control
DDR2 SDRAM SDRAM DIMMs - DIMMs based on Double Data Rate 2 (DDR2) DRAM also have data and data strobe frequencies at double the rate of the clock. This is achieved by clocking on both the rising and falling edge of the data strobes. The power consumption and voltage of DDR2 is significantly lower than DDR(1) at the same speed.
* PC2-3200 = 400 MHz data & strobe / 200 MHz clock for address and control
* PC2-4200 = 533 MHz data & strobe / 266 MHz clock for address and control
* PC2-5300 = 667 MHz data & strobe / 333 MHz clock for address and control
* PC2-6400 = 800 MHz data & strobe / 400 MHz clock for address and control
* PC2-8000 = 1000 MHz data & strobe / 500 MHz clock for address and control
* PC2-8500 = 1066 MHz data & strobe / 533 MHz clock for address and control
DDR3 SDRAM SDRAM DIMMs - DIMMs based on Double Data Rate 3(DDR3) DRAM have data and strobe frequencies at double the rate of the clock. This is achieved by clocking on both the rising and falling edge of the data strobes. The power consumption and voltage of DDR3 is lower than DDR2 of the same speed.
* PC3-6400 = 800 MHz data & strobe / 400 MHz clock for address and control
* PC3-8500 = 1066 MHz data & strobe / 533 MHz clock for address and control
* PC3-10600 = 1333 MHz data & strobe / 667 MHz clock for address and control
* PC3-12800 = 1600 MHz data & strobe / 800 MHz clock for address and control
How to install PC Ram
http://www.oempcworld.com/support/How_to_Install_PC_Memory.htm(approve sites)
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