Adding more memory.

I just added 8 MB of RAM (in two 4-MB chips) to a
pentium PC with 90 Mhz with 8 MB (also, in two 4-MB chips)
running win95 (barely moving !). All the chips are 72-pin.
The machine accepted the extra RAM ( for a total ot 16 MB ) and is working OK.
My question to the knowledgeable guys is:What are the things to consider when adding memory?, is it OK to add chips as long as they fit?, do the chips have to be installed in pairs?.
I will appreciate any comments.
TIA,
 
Efrain R Portales
Fort Worth
efrain12Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

EbenBrooksCommented:
The answer is: it depends.

In most cases, DIMMs (Dual In-line Memory Modules), i.e. the 72-pin thingies you just installed, can be installed only one at a time, but some motherboards want two at a time. SIMMs (Single In-line Memory Modules), which are hardly seen anymore, must be installed in either pairs or sets of four, depending on the motherboard.

When adding memory, it is best that all DIMMs/SIMMs be made by the same manufacturer and be of the same speed. Most DIMMs and SIMMs are 60ns (nanosecond), 70ns or 80ns. If you cannot get all modules by the same manufacturer, that's usually okay, because the memory speed is more crucial: DO NOT MIX MODULE SPEEDS! If your first DIMMs are 60ns, your next ones must be 60ns. Sometimes mixing them works, but more often it causes a heap of trouble, so don't do it.

Also, you must be grounded from static electricity discharge before installing memory. The easiest way to do this is to unplug the machine and then touch an unpainted part of the metal chassis before handling the memory or *any* circuit board.

--EbenBrooks
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
efrain12Author Commented:
Thanks a lot. You've been very informative.
People like you make this web site really outstanding !.
Happy Holidays!.

Efrain R Portales
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Components

From novice to tech pro — start learning today.