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What else can I help you with?
What kind of RAM comes in a Dell Inspiron 1721?
PC5300/PC5400 667MHz SODIMM Chip will be compatible for the Dell Inspiron 1721.
What does PC5400 DDR2 667MHz mean?
It is a form, speed and type of memory.
What is the differenc with memory PC 2 5300 pc5400 pc5000?
PC2 refers to DDR2 SDRAM, which is a second generation of DDR SDRAM (Double Data Rate, Synchronous Dynamic Random Access Memory). It features many technical improvements over the older DDR memory. Most notably is the doubled clock speed over DDR at the disadvantage of increased latencies. The number after PC2 refers to the maximum theoretical speed (in megabytes per second) that the memory can transfer. For example, PC2-5300 memory can theoretically transfer data at 5,300 MB/s, or 5.3 GB/s. DDR2 is not compatible with motherboards that use DDR or DDR3. When purchasing memory for a computer, check your computer manual for the correct type of memory for your computer. If you are not confident that you can choose the correct type of memory for your computer, have a professional service it.
What exactly is 667MHz?
667 MHz is a frequency that can be applied to computing, wave mechanics, or engine cycles. Hertz or Hz is a unit of measurement that measures frequency (for example an engine that rotates at 15 revolutions per second has a frequency of 15Hz). MegaHertz (MHz) is equal to One million Hertz, so one million times per second. I believe that you are asking in terms of computing because 667Mhz is the common speed of PC5400 DDR2 memory. This is a modern type of computer memory, so rest assured that it will suit your needs (i am assuming that you are looking to buy memory). The best brands to buy memory are: * Kingston * Corsair * Patriot * OCz
