Solved

Can I mix PC100 and PC133 SDRAM SIMMs?

Posted on 2001-07-23
6
762 Views
Last Modified: 2013-11-10
Can I mix PC100 and PC133 SDRAM SIMMs on the same system?
0
Comment
Question by:furby3
6 Comments
 
LVL 13

Accepted Solution

by:
magarity earned 50 total points
ID: 6309975
We definitely need a FAQ for this.

Yes, you can.  Of course, all will run at the lower speed.  In getting large sticks (256MB or more) check if your system takes high or low density chip configurations.

Pay no attention to the following posts that will claim 133 and 100 do not mix.

regards,
magarity
0
 
LVL 2

Expert Comment

by:newwavepro
ID: 6310416
As magarity has stated is correct just make certain that the SIMM/DIMM's are not mixed between registered and unregistered, and that they will run at the PC100 speed no extra benefit whatsoever for the PC133's

Also one side note do not mix non-ECC and ECC memory from PC100 to PC133, they did slightly change the way it handles the error checking and it has been known to cause minor problems.

Other than that is safe to do it.
0
 
LVL 7

Expert Comment

by:pbessman
ID: 6310547
"We definitely need a FAQ for this."  Why? You don't want the points!  Anyway, yes, yes, yes unless your system is not able to handle the type of RAM it is, this was already mentioned but someone is sure to say, "NO!".  I have run PC133 Ram on systems that should have been using PC-66 just to prove the point a few times.
0
Free camera licenses with purchase of My Cloud NAS

Milestone Arcus software is compatible with thousands of industry-leading cameras for added flexibility. Upon installation on your My Cloud NAS, you will receive two (2) camera licenses already enabled in the software. And for a limited time, get additional camera licenses FREE.

 
LVL 11

Expert Comment

by:RoadWarrior
ID: 6311183
I have lately come across a caveat to mixing speeds, though it doesn't apply to most normal usage. Sometimes it will happen that you have 8ns PC-100 memory in a machine with a tunable FSB, and it will work great at 115 even 124Mhz, pass any kind of test you can throw at it, identical PC-100 modules will work together, but put a PC-133 module in that system and it may start throwing errors. Similar things may happen with 10ns PC-66 modules at 75 or 83 mhz mixed with PC-100. May be some wierd kind of RF noise interplay thing, if they're both making it, it works, if only one is, the other don't like it. But this is all when they are out of spec anyway.
0
 
LVL 16

Expert Comment

by:theo kouwenhoven
ID: 6311416
Yes it is possible, but some main-boards have some trouble with it. If it is not functioning, try to put the 100mhz in the first mem-slots, and the 133mhz after that.
0
 

Author Comment

by:furby3
ID: 6312030
Thanks magarity, and everyone else who commented.
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

this article is a guided solution for most of the common server issues in server hardware tasks we are facing in our routine job works. the topics in the following article covered are, 1) dell hardware raidlevel (Perc) 2) adding HDD 3) how t…
This is about my first experience with programming Arduino.
This Micro Tutorial will give you a basic overview how to record your screen with Microsoft Expression Encoder. This program is still free and open for the public to download. This will be demonstrated using Microsoft Expression Encoder 4.
With the power of JIRA, there's an unlimited number of ways you can customize it, use it and benefit from it. With that in mind, there's bound to be things that I wasn't able to cover in this course. With this summary we'll look at some places to go…

895 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

13 Experts available now in Live!

Get 1:1 Help Now