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  l77Il7H said:
what exactly is dual ddr? i know it has something to do with using two ddr and that's basicly it. is it better to have dual ddr or a single stick, for instance; is two dual-compatible 256mb ddr better than single 512mb ddr?

to my knowledge, dual ddr is when two sticks of ddr memory are used together to double the amount of available bandwidth. so a single ddr solution, using let's say: a 256 stick and a 512 stick would have a bandwidth of 3.2 gigs or something like that. but if you use a dual ddr setup, you have to use two of the same, so two 512 sticks would have an available memory bandwidth of 6.4 gigs instead of 3.2 gigs.

your motherboard has to support it to, it's not something you just plugin. the new intel motherboards for the 800mhz fsb chips support it as does nforce 2.

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Effectively, dual DDR with 2 256MB sticks would be much better than single channel of one stick with 512MB...

What it does it write to both memory sticks a t the same time, like half data on one, half on the other, effectively doubling the speed. Current best normal speed is Dual Channel DDR400 which you use PC3200 RAM to get it. This is used with the Intel Canterwood/i875 and Springdale/i864PE based boards, and the NForce 2 boards for the AMD platform. I know some older boards, I think the granitebay/i7205 supports dual channel, not sure what all boards have it.

I have dual channel DDR 400 on Canterwood and I did pull out one of my two sticks of 512MB, then put the other back in, and I noticed a big difference in terms of performance. Go with Dual DDR if possible.

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Another thing you should be aware of is the "effective" bandwidth. On an nForce based system an athlon XP on the 266FSB can only use up to 2.1GB/Sec, when running in dual channel it will not be able to use the available 4.2GB/sec provided by the dual channel. However, it is most useful for integrated graphics as then the processor does not have to fight for bandwidth with the integrated controller.

On the Pentium 4 side, intel increased the bus to 800Mhz to fully take advantage of the dual DDR400Mhz memory controllers.

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  youm0nt said:
yes :yes: increases the bandwith and overall speed of the computer :) get corsiar,geil or ocz memory :woot:

also make sure the memory is CS2.0 and not 2.5 for maximum performance. i believe corsair and ocz do make a few 2.5 modules so you have to watch out for them.

i personally have never used 2.0 memory, so i can't tell you from experience how good the improvement over CS2.5 that 2.0 is, but from every benchmark i've seen if you want the absolutely BEST performance, 2.0 is the only way to go. of course they also thought Rambus was the only way to go, but that's another story altogether now with the new 800mhz fsb chips ain't it? lol

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  tkyoshi said:
Another thing you should be aware of is the "effective" bandwidth. On an nForce based system an athlon XP on the 266FSB can only use up to 2.1GB/Sec, when running in dual channel it will not be able to use the available 4.2GB/sec provided by the dual channel. However, it is most useful for integrated graphics as then the processor does not have to fight for bandwidth with the integrated controller.

On the Pentium 4 side, intel increased the bus to 800Mhz to fully take advantage of the dual DDR400Mhz memory controllers.

remember though that the athlon still doesnt benefit a whole bunch from Dual DDR ...not many changes have been made to help it make any use of it If it can only push 3 gigs and u have a pipe thats 4 or 6 gb/sec ur wasting the rest of the space ..hear what im sayin?

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  Martog said:
Effectively, dual DDR with 2 256MB sticks would be much better than single channel of one stick with 512MB...

What it does it write to both memory sticks a t the same time, like half data on one, half on the other, effectively doubling the speed. Current best normal speed is Dual Channel DDR400 which you use PC3200 RAM to get it. This is used with the Intel Canterwood/i875 and Springdale/i864PE based boards, and the NForce 2 boards for the AMD platform. I know some older boards, I think the granitebay/i7205 supports dual channel, not sure what all boards have it.

I have dual channel DDR 400 on Canterwood and I did pull out one of my two sticks of 512MB, then put the other back in, and I noticed a big difference in terms of performance. Go with Dual DDR if possible.

i865PE* not 64.....

7205 Granite Bay.

i875P

nForce2.

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