Dual Channel RAM 11 replies

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amoreelitesoldier

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#1 13 years ago

Sorry if this has been discussed before...This is probably a very simple answer, but here goes... If my mobo supports DDR memory, do the DiMMs have to be the same memory amount to get teh dual channel effect? i.e. I have one DIMM of 512 and another of 256. Am I utilizing the DDR support?confusedx.gif Thanks:D




Eagle One

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#2 13 years ago

dual channel has to have 2 ram sticks which are exactly the same, thats why ull see them come in 2x512 or whatever. im not sure about getting 4 ram sticks, whether there can be 2 pairs or whether they have to be the same, but they do with 2 sticks




[CoUk]niu

I take what n0e says way too seriously

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#3 13 years ago
Eagle Onedual channel has to have 2 ram sticks which are exactly the same, thats why ull see them come in 2x512 or whatever. im not sure about getting 4 ram sticks, whether there can be 2 pairs or whether they have to be the same, but they do with 2 sticks

4 ram sticks works on some mobo`s and not on others. Tried installing 4x512Mb on my Abit AV8,it worked but lowered the memory clock to 333 MHz from 400. The easiest and cheapest way to find out is to read the manual,however unmanly an act that is.:)




Eagle One

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#4 13 years ago

what happens if you have something like OCZ Performance DDR550, would it still lower your clock to 333MHz?




Keirgo

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#5 13 years ago

I have a question which might be related, my PC originally came with two sticks of 256MB PC3200 RAM, and recently I bought one stick of 512MB PC3200 RAM, and for a while it said that I had 1GB of RAM, but just today after I restarted my computer it reverted back to 512MB, is that because the new stick isn't the same as the other two?, also before, when It did show up as 1GB, it said it was operating in single channel mode (or something like that). So what is going on with my computer?, would I need to buy another stick of the new memory for it to work or something?




[CoUk]niu

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#6 13 years ago
Eagle Onewhat happens if you have something like OCZ Performance DDR550, would it still lower your clock to 333MHz?

Yes,it`s stated very clearly in the manual that if 4 DOUBLE RANK dimm`s are put in it reverts to 333. Noone has come up with single rank DDR400 afaik,but if anyone has any ideas where to get a pair please tell. Btw,the memory I tried to install was 4x512 Kingston HyperX 400MHz. So the only way to upgrade the memory and keep the performance of the Abit AV8 is to buy 2x 1024.




[CoUk]niu

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#7 13 years ago
-Sirius-I have a question which might be related, my PC originally came with two sticks of 256MB PC3200 RAM, and recently I bought one stick of 512MB PC3200 RAM, and for a while it said that I had 1GB of RAM, but just today after I restarted my computer it reverted back to 512MB, is that because the new stick isn't the same as the other two?, also before, when It did show up as 1GB, it said it was operating in single channel mode (or something like that). So what is going on with my computer?, would I need to buy another stick of the new memory for it to work or something?

To run in dual channel you must have memory of the same type and size,preferably paired when manufactured.




Keirgo

Formerly -Sirius-

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#8 13 years ago

Yeah but why did it say for a while 1GB or RAM, and then it when back to only 512MB?, although it has gone back to dual channel.

Also, If I get another one of the exact same RAM as the 512MB stick, would it run in dual channel when the two 256MB sticks of the same memory and the two 512MB sticks of again the same memory are all installed?




Eagle One

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#9 13 years ago

^ hope you can, i dont know though because it looks asthough i will have to do that one day




Kilobyte

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#10 13 years ago
-Sirius-Yeah but why did it say for a while 1GB or RAM, and then it when back to only 512MB?, although it has gone back to dual channel.

Sounds like your 512mb stick has either gone bad, or come loose. Or in some way has been disabled.

Either way, it is not reading it.

Whether or not you can run with four sticks, and any of them in Dual Channel depends on the motherboard. I think you probably will only be able to run one set of memory in Dual Channel.




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