Dual Channel memory

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cranberry girl

How can I find out if I'm getting dual channel access on my memory? The mobo
is a Winfast K7-NCR18D-PRO.

The manual says you get dual channel if you use (DIMM1 + DIMM3) or (DIMM2 +
DIMM3) but my memory (2x 256MB)is in DIMM1 (black socket) and DIMM2 (blue
socket right next to it). DIMM3 (blue socket a couple of cm away) is empty.

If I'm going to swap them round I'd like to be able to test to see if it
makes a difference :-)

I've got SiSoft Sandra but can't see if there's anything in there.

Also, if I put a 512MB in the third DIMM, will I lose dual channel on the
other 2?

Thanks
 
So do what your manual specifys - put the DIMMs in the same color sockets.
That, by definition, is how you get DDR.

To maintain DDR you MUST add/subtract the DIMMs in pairs. So, you will have
to add two (2) 512's to continue with DDR.
 
First thing you need to do is learn to read your user guides and believe that
the manufacturer understands what they are doing [if only just a little bit
more than you].

They write order to gain the function, put Dual Channel in 1 + 3: so do it!
It would appear that adding a third module will remove the Dual Channel
function!

To get an audit / test tool try Everest Home Edition. It will run full
memory tests and report speed of your memory modules etc.

http://www.lavalys.com/
 
My bios boot screen tells me that I am running in dual mode timing. It
flashes by real quick.

--
Regards,

Richard Urban

aka Crusty (-: Old B@stard :-)

If you knew as much as you thought you know,
You would realize that you don't know what you thought you knew!
 
I used to think that also. But last night I found an extra 512 meg module
and placed it in slot 2, for a total of 1.5 gig. My boot screen still says
that my memory is in dual mode configuration.

?????

--
Regards,

Richard Urban

aka Crusty (-: Old B@stard :-)

If you knew as much as you thought you know,
You would realize that you don't know what you thought you knew!


BAR said:
First thing you need to do is learn to read your user guides and believe
that
the manufacturer understands what they are doing [if only just a little
bit
more than you].

They write order to gain the function, put Dual Channel in 1 + 3: so do
it!
It would appear that adding a third module will remove the Dual Channel
function!

To get an audit / test tool try Everest Home Edition. It will run full
memory tests and report speed of your memory modules etc.

http://www.lavalys.com/





cranberry girl said:
How can I find out if I'm getting dual channel access on my memory? The
mobo
is a Winfast K7-NCR18D-PRO.

The manual says you get dual channel if you use (DIMM1 + DIMM3) or (DIMM2
+
DIMM3) but my memory (2x 256MB)is in DIMM1 (black socket) and DIMM2 (blue
socket right next to it). DIMM3 (blue socket a couple of cm away) is
empty.

If I'm going to swap them round I'd like to be able to test to see if it
makes a difference :-)

I've got SiSoft Sandra but can't see if there's anything in there.

Also, if I put a 512MB in the third DIMM, will I lose dual channel on the
other 2?

Thanks
Click to expand...
Click to expand...
 
cranberry said:
How can I find out if I'm getting dual channel access on my memory? The mobo
is a Winfast K7-NCR18D-PRO.

The manual says you get dual channel if you use (DIMM1 + DIMM3) or (DIMM2 +
DIMM3) but my memory (2x 256MB)is in DIMM1 (black socket) and DIMM2 (blue
socket right next to it). DIMM3 (blue socket a couple of cm away) is empty.

If I'm going to swap them round I'd like to be able to test to see if it
makes a difference :-)

I've got SiSoft Sandra but can't see if there's anything in there.

Also, if I put a 512MB in the third DIMM, will I lose dual channel on the
other 2?

Thanks
Click to expand...

Look for Everest on the web and run its read and write memory benchmarks,
then compare the results reported with the specs for the CPU and MB and
the DIMMs you have. I've found that, while Sandra delivers lots of info,
its benchmarks are a bit off, and Everest seems better.

Also, while a bit OT, most HD benchmarks -- including Sandra's -- are
benchmarks of the filesystem instead of benchmarks of the HD; for raw HD
data, I only trust HDtach.
 
Richard Urban said:
I used to think that also. But last night I found an extra 512 meg module
and placed it in slot 2, for a total of 1.5 gig. My boot screen still says
that my memory is in dual mode configuration.

?????

--
Regards,

Richard Urban

aka Crusty (-: Old B@stard :-)

If you knew as much as you thought you know,
You would realize that you don't know what you thought you knew!
Click to expand...

Thanks Richard - I'll have a look at the BIOS if I'm quick enough :-D
 
Bob Willard said:
Look for Everest on the web and run its read and write memory benchmarks,
then compare the results reported with the specs for the CPU and MB and
the DIMMs you have. I've found that, while Sandra delivers lots of info,
its benchmarks are a bit off, and Everest seems better.

Also, while a bit OT, most HD benchmarks -- including Sandra's -- are
benchmarks of the filesystem instead of benchmarks of the HD; for raw HD
data, I only trust HDtach.
Click to expand...

Thanks Bob - I'll have a look at Everest :-D
 
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