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Computer
Memory
How
much memory do I need?
Memory selection used to be a simple matter. You decided how
much memory to get when you bought your computer and lived
with it as memory upgrades were very expensive. Initially
products such as Microsoft Windows 95 could operate with a
modest 32 meg of memory. Over time newer versions of Windows
increased "recommended" memory requirements but
very rarely increased stated minimum requirements as Microsoft
did not want people thinking they would need to add more memory
before upgrading. While baseline recommendations may work
for lightly used systems, users today are likely to have many
applications and internet browsers running simultaneously.
This type of use dictates more memory than the baseline recommendation.
Usage of multimedia peripherals like CD-Rom drives and scanners
also tend to dictated more memory.
How
much memory should I buy?
As long as you don't exceed the maximum memory for your system,
more is better. The maximum memory amount for your system
should be detailed in your systems specifications. Modern
systems can often accommodate up to 2GB of memory while older
"Pentium" class systems may be limited to as little
as 64MB. For example, if your system maximum is 256MB and
you currently have 64MB installed, you can install up to 192MB
of additional memory or RAM. As a general guideline 128MB
should be the minimal amount of memory installed on any Windows
95/98/ME based system that is used for email, web-browsing,
office-automation, and games. Systems which run multimedia
devices and graphic applications should ideally have at least
256 MB of memory. Windows XP systems should always have a
minimum of 256 MB.
Which type of memory should I buy?
There are many types of memory, with each type being available
in various speeds. To guarantee compatibility you should match
the new memory to the speed and type of memory that is already
in the system.
Common types of memory include fast page mode
(FPM), extended data out (EDO), synchronous dynamic random
access memory (SDRAM), and double data rate SDRAM (DDR SDRAM).
Fast page mode and extended data out memory are older technologies
(first used in 1987, and 1995 respectively). Systems built
after 1997 are most likely to use some form of SDRAM memory.
Memory speeds are written in different formats
depending on the type of memory your computer uses. FPM and
EDO speeds are written in nanoseconds (ns). SDRAM and DDR
speeds are designated with a megahertz (MHz) or a "PC"
rating with common types may be PC100 or PC133.
Here's a rough guide to relative memory speeds.
Remember, it's best to match the memory that is currently
in your system.

Do I need to worry about memory banks?
Memory in a computer is usually designed and arranged in memory
banks. A memory bank is a group of sockets or modules that
make up one logical unit. So, memory sockets that are physically
arranged in rows may be part of one bank or divided into different
banks. Most computer systems have two or more memory banks
- usually called bank A, bank B, and so on. And each system
has rules or conventions on how memory banks should be filled.
For example, some computer systems require all the sockets
in one bank to be filled with the same capacity module. Some
computers require the first bank to house the highest capacity
modules. If the configuration rules aren't followed, the computer
may not start up or it may not recognize all the memory in
the system.
Getting
the right memory for your system?
While this may appear to be confusing, it is relatively easy
to determine the needed memory type by looking at the system
memory bank specifications and by examining the existing installed
memory and matching to it . Should you have questions about
the type of memory you need then please call us at 617-332-4391
and we will be glad to help.
Purchasing
memory?
We recommend purchasing memory from a mainstream manufacturer
like Micron, Texas Instruments, or NEC. These are the manufacturers
who supply the memory to companies like Dell, Hewlett-Packard,
and others. This is the best way to guarantee that your system
does not have problems and the cost difference between the
name brand memory and the generic memory is minimal.
Where
should you buy memory?
While you can buy computer memory from any of the big retail
chains we recommend that you first call a memory expert to
find the right memory for your system. This will help you
avoid having to make multiple trips to the store if you are
sold the wrong memory.. While we would be glad to sell you
memory (but only if you wanted it installed on-site in your
machine), there are many web based memory companies that can
provide you with quality memory at reasonable prices. Should
you have any questions about memory feel free to call us or
email us at info@fastlanecomputer.com and we will try our
best to answer them for you
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