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What does PC3200 stand for? |
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. basically the number after the pc is the clock speed of the RAM chip, and the DDR is Dual Data Rate
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PC3200 is another way of writing PC400 or DDR 400. All three of those mean that the bus speed of the RAM module is 400MHz.
In similar fashion PC2700 is PC333 or DDR 333 (333 MHz) and PC2100 is PC266 or DDR 266 (266MHz).
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PC3200 is a type of RAM or random access memory for your computer. There are several different types of RAM: for example PC100, PC133, PC2100, PC2700 and now PC3200. Each number represents a specific megahertz bus system. If you going to be upgrading your ram make sure to look for PC 3200 on the chip to assure that it is compatible with your bus system.
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For regular SDRAM in the PCxxx designation the xxx is the memory clock rate in MHz i.e. 133MHz for PC133.
For DDR SDRAM in the PCxxxx designation the xxxx is the memory bandwidth in MB/s i.e. PC3200 is 3200MB/s. This corresponds to a 200MHz clock (400MHz "data rate"). Since DDR SDRAM uses a 64-bit wide bus (8 bytes wide), 8 bytes * 400 MHz = 3200MB/s. Note these aren't real megabytes; they are found using 1MB = 1000 * 1000 B, not 1024 * 1024 B.
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Since all the computer companies can't seem to agree on a standard, there are many types of RAM especially with all the improvements with speed and number of pins allowing for faster access time and more storage. Finding the correct type of RAM is very difficult. You must know the following: the form factor (SIMMs, DIMMs, and RIMMs), the type (SD, DDR SD, RD, DDR, DDR2, DDR3), and the speed (333, 400, 667, etc). Because RAM is the most commonly upgraded component in computer system, some company (I forget who) developed a system for telling what type of RAM is which. So instead of having to know all the above information, you just need to know the PC rating (like PC3200) and you're good to go.
First answer by MARTIN MOLLART. Last edit by Mayoman7. Contributor trust: 18 [recommend contributor]. Question popularity: 140 [recommend question]
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