dual channel DDR + single DDR stick ram


V

\(\) |V| 3 G A

hey,

i have 2x 256mb PC3200 DDR sticks on my a7n8x mobo, with 1 spare ram slot.

i`m thinking of upgrading upto 1gb ram (add a pc3200 512mb stick)

what type of memory organization am i looking at?
will the mobo use the dual channel sticks first for speed, and if/when it
runs out of ram, it will use the 3rd single channel stick? or will it just
fire the data 3way from day 1?

any info on this please
tim draper
 
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R

Roger M

() |V| 3 G A said:
hey,

i have 2x 256mb PC3200 DDR sticks on my a7n8x mobo, with 1 spare ram slot.

i`m thinking of upgrading upto 1gb ram (add a pc3200 512mb stick)

what type of memory organization am i looking at?
will the mobo use the dual channel sticks first for speed, and if/when it
runs out of ram, it will use the 3rd single channel stick? or will it just
fire the data 3way from day 1?

any info on this please
tim draper
I don't know how it works but I do know the result, on my machine at least.
It slowed my machine down. I have a program I use daily and I noticed it
starting a little slower. I ran some of the benchmark programs I have and sure
enough the benchmark scores were lower across the board.



Roger
 
V

\(\) |V| 3 G A

is that because of dual DDR, and a single DDR? or just because of the extra
ram?

ie, if i were to replace my 2x 256mb's with 2x 512mb's would i see a
reduction in performance.

thanks
tim
 
R

Roger M

() |V| 3 G A said:
is that because of dual DDR, and a single DDR? or just because of the extra
ram?

ie, if i were to replace my 2x 256mb's with 2x 512mb's would i see a
reduction in performance.
Sorry I don't have the answers to your questions, all I have are the results
from my experience with upgrading my memory in my machine.



Roger
 
B

Baron Of Hell

hey,

i have 2x 256mb PC3200 DDR sticks on my a7n8x mobo, with 1 spare ram slot.

i`m thinking of upgrading upto 1gb ram (add a pc3200 512mb stick)

what type of memory organization am i looking at?
will the mobo use the dual channel sticks first for speed, and if/when it
runs out of ram, it will use the 3rd single channel stick? or will it just
fire the data 3way from day 1?

any info on this please
tim draper
So
slot 1 = 256
slot 2 = 512
slot 3 = 256

Yes that is how it should be. slot 1 and 2 are for dual use. If you do not
have the 256 in slots 1 and 2 now you should change it. So 1 and 3 should
be getting used at the same time and then 2 kicks in after that.
 
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D

Dogbert

Are your 256 DIMMs dual-channel? You didn't specify. Just because they are
DDR does not make them dual channel. You can buy 512 DDR in both single
channel and dual channel (for about twice the price).
 
J

JT

Are your 256 DIMMs dual-channel? You didn't specify. Just because they are
DDR does not make them dual channel. You can buy 512 DDR in both single
channel and dual channel (for about twice the price).
The Dual channel ram you buy are just a pair of single channel that are
matched and certified by the manufacturer. They are nothing special
otherwise.

JT
 
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D

Dogbert

I have seen single-ship, dual channel DIMMs. As I understand it, it is a
single DIMM that acts like two matched DIMMs. This allows the CPU to access
the DIMM as if it was 2 DIMMS, allowing for twice as many memory operations.

You need to make sure the dual-channel chips are compatable with your
motherboard chipset, too.
 

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