Dual memory channels working?


P

pjgtech

I have an Asus A7N8X Deluxe with 2 x 256Mb crucial DDR ram chips (total
512Mb ram).

How do I know if the dual channel bit is working?

I have installed the 2 chips in the first and third memory slots, not next
to each other in the first and second slots, is this correct?

Ta...

*Peter* - http://www.cix.co.uk/~pjgtech/home.html
 
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M

Meta WinAPI

Re: Your second question:

Best if memory sticks identical. One in each channel .. then two in each
channel and so on. The mobo manual should be able to inform you which memory
slot is the first for each channel and so on. On my mobo [ Intel ] the first
slot of channel A is the first slot and the first slot of the
channel B is the third slot. It is easy because, here, the channels
are slightly physically separated from each other [ i.e. 1 & 2 are paired
as channel A and 3 & 4 are paired as channel B ]. Nevertheless, the mobo
manual has a diagram showing which is which anyway.

Also. have a look at your CMOS .. here it reports on a per channel basis [
so I know how the memory is installed in the board ], maybe yours does too.

Re: your first question:

Sorry, that I am not specifically answering your first question i.e. how do
I know if dual channel is specifically working, even if I have the memory
installed correctly. Here, I'm *assuming* that it is working. The CMOS
reports a stick in each channel and that HT is enabled and Windows reports
that there are two processors which is how Windows should see a HT P4. As
yet , though, I
haven't found where anything specifically reports that the dual channel
itself is being used as a dual channel.

Meta

--

Remove the Obstacle to reply by email or to Messenger me.
| I have an Asus A7N8X Deluxe with 2 x 256Mb crucial DDR ram chips (total
| 512Mb ram).
|
| How do I know if the dual channel bit is working?
|
| I have installed the 2 chips in the first and third memory slots, not next
| to each other in the first and second slots, is this correct?
|
| Ta...
|
| *Peter* - http://www.cix.co.uk/~pjgtech/home.html
 
S

steven67@

Meta said:
Re: Your second question:

Best if memory sticks identical. One in each channel .. then two in each
channel and so on. The mobo manual should be able to inform you which memory
slot is the first for each channel and so on. On my mobo [ Intel ] the first
slot of channel A is the first slot and the first slot of the
channel B is the third slot. It is easy because, here, the channels
are slightly physically separated from each other [ i.e. 1 & 2 are paired
as channel A and 3 & 4 are paired as channel B ]. Nevertheless, the mobo
manual has a diagram showing which is which anyway.

Also. have a look at your CMOS .. here it reports on a per channel basis [
so I know how the memory is installed in the board ], maybe yours does too.

Re: your first question:

Sorry, that I am not specifically answering your first question i.e. how do
I know if dual channel is specifically working, even if I have the memory
installed correctly. Here, I'm *assuming* that it is working. The CMOS
reports a stick in each channel and that HT is enabled and Windows reports
that there are two processors which is how Windows should see a HT P4. As
yet , though, I
haven't found where anything specifically reports that the dual channel
itself is being used as a dual channel.

Meta

..

Which Intel motherboard do you have? Look in BIOS setup, at the Main menu. The
current memory mode, Dual Channel or Single Channel should be listed.
 
M

Meta WinAPI

Right on - staring me in the face - thanks Steve.

Meta
--

Remove the Obstacle to reply by email or to Messenger me.

| Meta WinAPI wrote:
|
| > Re: Your second question:
| >
| > Best if memory sticks identical. One in each channel .. then two in each
| > channel and so on. The mobo manual should be able to inform you which
memory
| > slot is the first for each channel and so on. On my mobo [ Intel ] the
first
| > slot of channel A is the first slot and the first slot of the
| > channel B is the third slot. It is easy because, here, the channels
| > are slightly physically separated from each other [ i.e. 1 & 2 are
paired
| > as channel A and 3 & 4 are paired as channel B ]. Nevertheless, the mobo
| > manual has a diagram showing which is which anyway.
| >
| > Also. have a look at your CMOS .. here it reports on a per channel basis
[
| > so I know how the memory is installed in the board ], maybe yours does
too.
| >
| > Re: your first question:
| >
| > Sorry, that I am not specifically answering your first question i.e. how
do
| > I know if dual channel is specifically working, even if I have the
memory
| > installed correctly. Here, I'm *assuming* that it is working. The CMOS
| > reports a stick in each channel and that HT is enabled and Windows
reports
| > that there are two processors which is how Windows should see a HT P4.
As
| > yet , though, I
| > haven't found where anything specifically reports that the dual channel
| > itself is being used as a dual channel.
| >
| > Meta
|
|
| .
|
| Which Intel motherboard do you have? Look in BIOS setup, at the Main
menu. The
| current memory mode, Dual Channel or Single Channel should be listed.
|
|
 
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J

John Anon

How do I know if the dual channel bit is working?
While we're on the subject, can somebody remark on performance gains
from dual channel DDR over ordinary DDR?

I guess this is a motherboard feature and you can use the same RAM
sticks in either type of mobo.

I am not getting the main idea of dual channel. Is it simply a doubling
of the width of the data word fetched during each cycle, hence a
doubling of memory throughput? Minus the negative affects of branching
I guess?
 

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