?
Solved

Can I mix single-channel and dual channel memory sticks?

Posted on 2011-09-06
9
Medium Priority
?
554 Views
Last Modified: 2013-11-10
I currently have two 1 Gb memory sticks (1024 Mb 240 pin, PC400 DR2 667MZ).  I want to purchase two 2 Gb sticks of the same configuration.  I have 4 slots.  Can I mix them or will the dual channel revert to single channel?  Also, is this mother board dependent?
0
Comment
Question by:rmmarsh
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
9 Comments
 
LVL 38

Expert Comment

by:Gerwin Jansen, EE MVE
ID: 36491812
0
 

Author Comment

by:rmmarsh
ID: 36491858
No it's not... this question is can I mix dual channel and single channel on the same motherboard...  I know the existing memory is NOT dual channel, but the memory I am buying is dual channel.

HTH
0
 
LVL 34

Expert Comment

by:jamietoner
ID: 36492206
Yes but it will all run in single channel mode. However the chipset you have(nvidia 680i) does support dual channel, im not sure why garycase(his info is usually spot on) said it doesn't because it does. Also are you running a 64-bit os?
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 

Author Comment

by:rmmarsh
ID: 36492391
Yes, running Win 7 64-bit... I ran MemTest and the 1 Gb didn't show as dual, so I just assume it is single...I will remove the 1 Gb and just run the two sicks of 2 Gb until I get more money...
0
 
LVL 34

Accepted Solution

by:
jamietoner earned 2000 total points
ID: 36492440
Try cpu-z to see if you are running in dual channel.
http://www.cpuid.com/softwares/cpu-z.html
Click on the memory tab and after Channels it will say Dual or Single, my bet is it says dual as long as the memory is installed properly.
0
 

Author Closing Comment

by:rmmarsh
ID: 36492480
You are absolutely right!  It is dual!... thank you so much... now, I'll just add the two new sticks to what I have and I'll have 6 Gb of RAM... wheeeeeeee!
0
 
LVL 34

Expert Comment

by:jamietoner
ID: 36492488
When you get the new ram install it in the first channel(slots 1 and 3) and the 1Gb sticks in the second channel(slots 2 and 4), for best performance.
0
 
LVL 70

Expert Comment

by:garycase
ID: 36493177
Well, I blew that one -- I depended on two things that both proved inaccurate in this case:  (1) MemTest+ wasn't showing dual channel mode (apparently doesn't recognize it for that chipset); and (2) Crucial indicated that it didn't support dual channel (a rare mistake).

One note, however, regarding the wording of the question [Can I mix single-channel and dual channel memory sticks?}  ==>  There is NO SUCH THING as "dual channel memory" -- that's a marketing phrase used to sell matching modules of memory for use in motherboards that support dual channel operation.

Your CURRENT 1GB modules will work in dual channel mode if installed correctly (as I outlined in the previous question -- but I mistakenly depended on MemTest to identify whether it was operating in the correct mode).

All you have to do to use all 4 modules in dual channel mode is be sure they're in matching pairs in the correct slots -- as jamietoner has already noted.
0
 

Author Comment

by:rmmarsh
ID: 36495175
Thanks Gary... I appreciate the clarification.
0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Did you know SD-WANs can improve network connectivity? Check out this webinar to learn how an SD-WAN simplified, one-click tool can help you migrate and manage data in the cloud.

Question has a verified solution.

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

Introduction: When a connection to the internet is established, there always exists a modem between the connected device and the ISP (Internet Service Provider). The Operating System (OS) on your PC controls the modem which communicates with the …
As you can read I recycle all my old hardware and the time has come that my power supply of 200 Watt cannot provide enough power for my backup server. I have lots of Compaq power supply's laying around, so I figured to use one of these PSU's. I t…
Michael from AdRem Software outlines event notifications and Automatic Corrective Actions in network monitoring. Automatic Corrective Actions are scripts, which can automatically run upon discovery of a certain undesirable condition in your network.…
In this video, Percona Solution Engineer Dimitri Vanoverbeke discusses why you want to use at least three nodes in a database cluster. To discuss how Percona Consulting can help with your design and architecture needs for your database and infras…

752 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