please confirm - 2no. 256MB DDR chips in dual channel modem faster than 1no. 512MB?
11 June 2005, 04:56 PM
#1
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please confirm - 2no. 256MB DDR chips in dual channel modem faster than 1no. 512MB?
Can I assume that 2no. 256MB DDR chips working in DUAL CHANNEL mode will be faster than a single 512MB DDR chip on its own ?
I've asked a similar question in the past but would just like confirmation that "dual channel" implements a 128 bit memory interface...
...compared with a single DDR which would operate with an 64bit wide memory interface ?
I've asked a similar question in the past but would just like confirmation that "dual channel" implements a 128 bit memory interface...
...compared with a single DDR which would operate with an 64bit wide memory interface ?
11 June 2005, 05:36 PM
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Yes it will be quicker, just think of it as filling up a watering can, 2 small ones to 1 big one, 3 hose pipes filling up at the same rate, the 2 small ones will be full in half the time the big one will, basically thats how it works.
Tony
Tony
11 June 2005, 05:59 PM
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Don't confuse me with your watering can analogy Tony- I'm confused enough as it is DOH! 
Meridian, surely in a single cycle, a 128 bit access is a lot more beneficial than its 64 bit equivalent ?
Meridian, surely in a single cycle, a 128 bit access is a lot more beneficial than its 64 bit equivalent ?
Last edited by Fuchsrohre; 11 June 2005 at 06:21 PM.
11 June 2005, 06:32 PM
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Basically 2 256mb ddr/ddr2 will "fill up" twice as quick as 1 512 ddr/ddr2.
I think thats what you wanted to know
Though the down side is, that you will eventually have to change to something bigger if you want more memory.
Tony
I think thats what you wanted to know
Though the down side is, that you will eventually have to change to something bigger if you want more memory.
Tony
11 June 2005, 07:00 PM
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Ok back to the beginning
I take it the mother board is a duel channel mobo?
You can mix and match a bit on these, if you have 4 slots like mine does, you can have 2 pairs or 2 of 256mb ram running in duel channel mode, you can run single channel mode if you put them next to each other in different coloured banks (same colour bank = duel channel) or you can run say a 256mb and a 512mb in duel channel BUT you have to reflect this on the other duel channel otherwise it wont work.
Thats it, ive confused myself
Tony
I take it the mother board is a duel channel mobo?
You can mix and match a bit on these, if you have 4 slots like mine does, you can have 2 pairs or 2 of 256mb ram running in duel channel mode, you can run single channel mode if you put them next to each other in different coloured banks (same colour bank = duel channel) or you can run say a 256mb and a 512mb in duel channel BUT you have to reflect this on the other duel channel otherwise it wont work.
Thats it, ive confused myself
Tony
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11 June 2005, 07:13 PM
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Originally Posted by Fuchsrohre
Can I assume that 2no. 256MB DDR chips working in DUAL CHANNEL mode will be faster than a single 512MB DDR chip on its own ?
I've asked a similar question in the past but would just like confirmation that "dual channel" implements a 128 bit memory interface...
...compared with a single DDR which would operate with an 64bit wide memory interface ?
I've asked a similar question in the past but would just like confirmation that "dual channel" implements a 128 bit memory interface...
...compared with a single DDR which would operate with an 64bit wide memory interface ?
Always use matched pairs as well.
11 June 2005, 08:24 PM
#9
Originally Posted by Fuchsrohre
Can I assume that 2no. 256MB DDR chips working in DUAL CHANNEL mode will be faster than a single 512MB DDR chip on its own ?
I've asked a similar question in the past but would just like confirmation that "dual channel" implements a 128 bit memory interface...
...compared with a single DDR which would operate with an 64bit wide memory interface ?
I've asked a similar question in the past but would just like confirmation that "dual channel" implements a 128 bit memory interface...
...compared with a single DDR which would operate with an 64bit wide memory interface ?
12 June 2005, 12:01 AM
#10
Originally Posted by Fuchsrohre
Meridian, surely in a single cycle, a 128 bit access is a lot more beneficial than its 64 bit equivalent ?
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