Dual Channel DDR, How???!!! please read!!!!

dguy6789

Diamond Member
Dec 9, 2002
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I got a nforce 2 mainboard. I have a 512 PC2700. Dual channel uses 2 chips. Can the 2 chips be diferent size? Liek a 512 pc2700 and a 256 pc2700? And technically how does dual channel ddr actually work? Thx in advance.
 

ChampionAtTufshop

Platinum Member
Nov 15, 2002
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each channel has to be equal (otherwise you will only be using 256mb out of each stick in dual channel, and 256mb will be in single channel)....i dont even nkow if this works....if its anything like raid0 in this aspect, 256mb will go to waste and wont be used at all

so if you want to use your sticks, you need to buy another 256mb and put that with the other 256mb stick in a channel, and then the 512mb stick in the other channel

it works like a raid0 array, but with ram instead of harddrives
half of the data is sent to one channel, the other half to the other channel

 

dguy6789

Diamond Member
Dec 9, 2002
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how do i tell about channels? there is 1 Black memory slot and 2 blue ones. My mainboard book says it will use dual channel in slots 1,3 2,3 and 1,2,3. SO how does this work.
 

ChampionAtTufshop

Platinum Member
Nov 15, 2002
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the two slots closest to each other represent 1 channel, the other one represnts the other channel

you have an a7n8x right? (thats the only mobo i konw of so far that has color coding lol)

scenario one:
you ditch 256mb stick and buy 512 (or the other way around, ditch 512 and buy another 256) and then stick each stick in the blue slots

scenario two:
256mb goes in black slot AND the blue slot next to it
512mb goes in the blue slot that is furhter apart

 

Adul

Elite Member
Oct 9, 1999
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danny.tangtam.com
Originally posted by: ChampionAtTufshop
each channel has to be equal (otherwise you will only be using 256mb out of each stick in dual channel, and 256mb will be in single channel)....i dont even nkow if this works....if its anything like raid0 in this aspect, 256mb will go to waste and wont be used at all

so if you want to use your sticks, you need to buy another 256mb and put that with the other 256mb stick in a channel, and then the 512mb stick in the other channel

it works like a raid0 array, but with ram instead of harddrives
half of the data is sent to one channel, the other half to the other channel


If you put in 768 MB of ram into your system you will have 768 MB of ram to use. But only 512 MB of that will be in dual CHannel mode, with the rest of the RAM being treated to single channel action.

The first two DIMM slots are generaly channels 1 and 2
 

ChampionAtTufshop

Platinum Member
Nov 15, 2002
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Originally posted by: Adul
Originally posted by: ChampionAtTufshop
each channel has to be equal (otherwise you will only be using 256mb out of each stick in dual channel, and 256mb will be in single channel)....i dont even nkow if this works....if its anything like raid0 in this aspect, 256mb will go to waste and wont be used at all

so if you want to use your sticks, you need to buy another 256mb and put that with the other 256mb stick in a channel, and then the 512mb stick in the other channel

it works like a raid0 array, but with ram instead of harddrives
half of the data is sent to one channel, the other half to the other channel


If you put in 768 MB of ram into your system you will have 768 MB of ram to use. But only 512 MB of that will be in dual CHannel mode, with the rest of the RAM being treated to single channel action.

The first two DIMM slots are generaly channels 1 and 2

ok thx for clearing that up
:)

btw, dimm 1 = closest to cpu socket, dimm2=next to that, dimm3= next to that
so it would be :
dimm1.dimm2.......dimm3

 

Billiam247

Junior Member
Mar 2, 2003
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Different colors = different channels. Get another 256 and put the 512 on its own channel and the 256s on their channel. Problem solved.
 

ChampionAtTufshop

Platinum Member
Nov 15, 2002
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Originally posted by: Billiam247
Different colors = different channels. Get another 256 and put the 512 on its own channel and the 256s on their channel. Problem solved.

not on a7n8x it aint

channel 1: blue and black that are tightly huddled together
channel 2: blue that is left out in the cold