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RAMs not compatible with each other

7 posts · originally from https://geek.digit.in/community/threads/rams-not-compatible-with-each-other.142939/

I
ishanmeh Original post #1
Jun 26, 2011 at 12:10 AM
Hi,
I have a Intel D102GGC2 motherboard with Intel Pentium D 805 processor having core speed of 2.667 GHz.
I was using a 1GB of Dynet RAM (DDR2-667 MHz) earlier. Recently, I got a Transcend 2GB DDR2-667 MHz RAM with the intention of upgrading my RAM memory to a total of 3GB (1GB Dynet + 2GB Transcend).
Both of them work fine when used individually. However, when I use both of them together, the PC does not start. Hence, at a time, I can have only 1GB or only 2GB RAM.
Is there a spec that I missed to check while buying the Transcend RAM? Do both the RAMs have to be from the same vendor?
I have limited knowledge with h/w. Please tell me if any more info is needed.
Any help will be appreciated.
Thanks.
Faun
Faun #2
Jun 26, 2011 at 12:22 AM
May be the other parameters are not matching, timing etc.
topgear
topgear #3
Jun 26, 2011 at 3:46 AM
yep, seems like a latency timing and issue.

@ OP - are you using the latest bios version ? if no upgrade it to the latest.

After installing both modules take out the big coin sized mobo battery out and place it back again after a couple of minutes and post back the feedback.
mithun_mrg
mithun_mrg #4
Jun 27, 2011 at 11:33 AM
ishanmeh said:
Hi,
Recently, I got a Transcend 2GB DDR2-667 MHz RAM.
Click to expand...

I doubt its a 800MHz Ram with different timings from ur Dynet Ram

Ur board ony supports 2GB maximun system RAM and only DDR2 533 or DDR2 400 speeds are supported
Intel® Desktop Board D102GGC2 — System memory
coderunknown
coderunknown #5
Jun 27, 2011 at 6:05 PM
timing mismatch. OR the 2nd ram slot maybe bad. about the ram speed, the faster one will clock down to the level of slower one.

@OP, if you don't know about timing, post CPU_Z screenshot of the memory tab using the different ram modules. this will let us know if the ram have different timing or what parameters are conflicting.
T
Tech&ME #6
Jun 28, 2011 at 8:47 PM
Sam said:
timing mismatch. OR the 2nd ram slot maybe bad. about the ram speed, the faster one will clock down to the level of slower one.
Click to expand...


It will not clock down in dual configuration. Only in single mode.

And OP --->

Your motherboard only supports 2 GB of maximum RAM see this Link

So, you will be only able to use :

1GB + 1 GB in dual configuration

or

2 GB in single configuration
topgear
topgear #7
Jun 29, 2011 at 3:38 AM
^^ that's the reason why he is facing the issue - he can only use 2GB mem max - so there's no question of using 3 GB ram - he should only use the 2 GB Transcend ram module.