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DDR -> DDRII -> DDRIII - Page 2

post #21 of 77
3/18/05 at 12:51am
As I understand it, DDR2 does outperform DDR, but only by 5%. And the current advantage of DDR2 is that notebook DDR can't run at 533 Mhz.
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post #22 of 77
3/18/05 at 1:57am
Thread Starter 
Quote:
Originally Posted by Djembe_Rob
As I understand it, DDR2 does outperform DDR, but only by 5%. And the current advantage of DDR2 is that notebook DDR can't run at 533 Mhz.
Well according to Tom's article, Dual Channel DDR2 outperform Single Channel DDR2 by 5%.

I think that is where the confusion and 5% being toss around.

But from looking at the chart, it seems that the Single Channel DDR2 will be able to take advantage of the FSB and the DUAL channel DDR PC3200 will be as well.
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post #23 of 77
3/18/05 at 2:37am
So dual-channel DDR2 is better or worse than single-channel DDR2...?
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post #24 of 77
3/18/05 at 2:40am
it's better by 5%.
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post #25 of 77
3/18/05 at 7:50am
Hmmm....I thought the Tom's article was saying that the new Sonoma scheme with DDR2 was 5% faster than the older Centrino platform with DDR...
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post #26 of 77
3/18/05 at 7:51am
Hmmm....I thought the Tom's article was saying that the new Sonoma scheme with DDR2 was 5% faster than the older Centrino platform with DDR...I didn't think it was just a function of memory type.
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post #27 of 77
3/18/05 at 12:36pm
Thread Starter 
Nope he ment 5% faster for dual channel DDR2 vs single channel DDR2

Quote:
As the benchmark results tables reveal, the speed advantage afforded by the new platform's dual-channel DDR2-533 memory is a maximum of 5% compared to single-channel mode.
http://www4.tomshardware.com/mobile/...alviso-23.html
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post #28 of 77
3/18/05 at 6:03pm
Thread Starter 
Wouldn't you want this in your laptop?

http://www.digitimes.com/news/a20050315PR207.html

TwinMOS to produce DDR2-800 modules in June
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post #29 of 77
3/19/05 at 6:37pm
Thread Starter 
Latency Test between DDR vs the new DDR2 lower latency!

http://www.xbitlabs.com/articles/mem...dr2-ddr_3.html
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post #30 of 77
3/19/05 at 6:39pm
Thread Starter 
DDR vs DDR2 Encoding Benchmark
http://www.anandtech.com/cpuchipsets...px?i=2088&p=17

Quote:
It appears that you really will not lose any performance in choosing a 915 motherboard with DDR support instead of 915 with DDR2. With initial launch prices of DDR2 still considerably higher than DDR prices, you can choose a 915 board with DDR and not have to worry about losing any performance.

As prices for DDR2 drop more in line with DDR, the choice becomes a little more interesting. DDR2 will mature beyond the current 4-4-4 timings, and as timings and headroom improve, DDR2 becomes a more interesting choice for memory.
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post #31 of 77
3/19/05 at 6:59pm
Good find on the lower latency efforts article. So, using the z71v as an example, one would be good at this point, for the money, to install DDR ram?
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post #32 of 77
3/19/05 at 7:04pm
Thread Starter 
Quote:
Originally Posted by subtle_spectre
Good find on the lower latency efforts article. So, using the z71v as an example, one would be good at this point, for the money, to install DDR ram?
You can't install DDR in DDR2 slot, vice versa. They have different pin configuration and voltage.
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post #33 of 77
3/21/05 at 4:29pm
Thread Starter 
Here is a bench comparison between DDR vs DDRII Single Channel vs DDRII Dual Channel.

http://www6.tomshardware.com/mobile/...l#applications
http://www6.tomshardware.com/mobile/...alviso-18.html
http://www6.tomshardware.com/mobile/...alviso-21.html
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post #34 of 77
3/22/05 at 1:39am
Quote:
Originally Posted by HardBall
That's precisely why buying a Sonoma Laptop might be a mistake, in paying premium for a memory technology that currently offers no performance enhancement, and when it's clocked higher for an advantage over DDR-I, DDR-III will be available.

DDR-III will first become commercially available sometime during mid-year 2006, that is only about 15 months away.
You think it will be affordable when its actually first commerically available? Were you around PCs when DDR first came out, or PC133 SDRAM or when DDR2 first came out. Prices were inflated for some time. And "only 15 months eh?"...add on the time it will take for the memory to become affordable and it will be approaching two years. A generation cycle in computing terms.
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post #35 of 77
3/22/05 at 1:41am
Quote:
Originally Posted by smilepak
You can't install DDR in DDR2 slot, vice versa. They have different pin configuration and voltage.
Keep in mind that the dual channel DDR2 is not getting a chance to shine due to the restrictive fronst side bus of the Dothan.
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post #36 of 77
3/22/05 at 1:44am
i hope that the next chip... yonah with dual core will let the 1066mhz run.. 533 per channel
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post #37 of 77
3/22/05 at 4:44am
Quote:
Originally Posted by Progneta
i hope that the next chip... yonah with dual core will let the 1066mhz run.. 533 per channel
Which will allow the battery life of 2.5 hours??
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post #38 of 77
3/22/05 at 11:21am
Raw speed isn't going to matter too much until the FSB gets a change on the Pentium-M side...it isn't like a Pentium-4 in terms of bandwidth needs.

I think for current DDR-II 533 stuff, if we can see some SODIMMs in latencies other than 4-4-4-10 it might help us out some. I know on the desktop side there are some CL3 DDRII products now (Crucial Ballistix and others). Wouldn't better latency help us more if we're using a Pentium-M
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post #39 of 77
3/22/05 at 2:50pm
Yessir. Given the FSB speed, a lower latency RAM would help out more than a memory speed twice that of the FSB for most users. For those with the integated video..the extra memory bandwidth can be used for the graphics.
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post #40 of 77
3/22/05 at 4:15pm
I say we skip DDR-III and go straight to DDR IV
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