Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 564
  • Last Modified:

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

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
rmmarsh
Asked:
rmmarsh
1 Solution
 
Gerwin Jansen, EE MVETopic Advisor Commented:
0
 
rmmarshAuthor Commented:
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
 
jamietonerCommented:
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
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 
rmmarshAuthor Commented:
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
 
jamietonerCommented:
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
 
rmmarshAuthor Commented:
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
 
jamietonerCommented:
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
 
Gary CaseRetiredCommented:
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
 
rmmarshAuthor Commented:
Thanks Gary... I appreciate the clarification.
0

Featured Post

Become an Android App Developer

Ready to kick start your career in 2018? Learn how to build an Android app in January’s Course of the Month and open the door to new opportunities.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now