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Dual Channel or no?

post #1 of 34
6/15/05 at 10:49pm
Thread Starter 
I just recetly got a Inspiron 9300. I got the minimal memory and planned to purchase 2 gigs from newegg.com. However, I went back & looked at the inspiron 9300 order page, and it says:

256MB DDR2 SDRAM at 533MHz 1 Dimm
512MB Dual Channel DDR2 SDRAM at 533MHz 2 Dimm
1GB Dual Channel DDR2 SDRAM at 533MHz 2 Dimm
2GB Dual Channel DDR2 SDRAM at 533MHz 2 Dimm

Notice the exclusion of "dual channel" form the 256 Mb option. Is this exclusion caused by the simple fact that there is only 1 dimm, or is there actually a difference in the system? Thanks for your help.
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post #2 of 34
6/15/05 at 10:52pm
all 9300s have dual channel capability. but you need 2 dimms to take advantage of it. so, the 256mb is only single channel cuz it's 1 dimm, not 2 like the others.
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post #3 of 34
6/15/05 at 10:52pm
you need 2 for DUAL channel.
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post #4 of 34
6/15/05 at 10:53pm
You need 2 simlar sticks to enable dual channel. It does not matter though. There is no performance benefit with the 533 bus speed.
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post #5 of 34
6/16/05 at 12:21am
Uh..............yeah there is a performance benifit. Dual channel offers double the bandwidth.

So one stick of DDR 2 533mhz is 4.3GB/s.

2 exact same size sticks (2x512meg) will offer you double the bandwidth or 8.6GB/s.

Dual Channel DDR 400(NOT DDR2) /800mhz has a max bandwidth of 6.4GB/s, single channel DDR 400/800 has 3.2GB/s.

Read!!!!!!!!!!!!!.............Fill your head and stop giving bad advice.

Dual Channel will always be faster. Next time your playing BF2 and it takes a long time to load, ask your self if your single channel is slower????


http://www.kingston.com/newtech/MKF_...whitepaper.pdf

http://www.digit-life.com/articles2/...ma-fsb266.html
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post #6 of 34
6/16/05 at 12:23am
Quote:
Originally Posted by Lindy
Uh..............yeah there is a performance benifit. Dual channel offers double the bandwidth.

So one stick of DDR 2 533mhz is 4.3GB/s.

2 exact same size sticks (2x512meg) will offer you double the bandwidth or 8.6GB/s.

Dual Channel DDR 400(NOT DDR2) /800mhz has a max bandwidth of 6.4GB/s, single channel DDR 400/800 has 3.2GB/s.

Read!!!!!!!!!!!!!.............Fill your head and stop giving bad advice.

Dual Channel will always be faster. Next time your playing BF2 and it takes a long time to load, ask your self if your single channel is slower????


http://www.kingston.com/newtech/MKF_...whitepaper.pdf

http://www.digit-life.com/articles2/...ma-fsb266.html

Nope, not on Pentium M systems
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post #7 of 34
6/16/05 at 12:26am
Lindy, please have some respect for posters and yourself.
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post #8 of 34
6/16/05 at 12:35am
Quote:
Originally Posted by Lindy
Uh..............yeah there is a performance benifit. Dual channel offers double the bandwidth.

So one stick of DDR 2 533mhz is 4.3GB/s.

2 exact same size sticks (2x512meg) will offer you double the bandwidth or 8.6GB/s.

Dual Channel DDR 400(NOT DDR2) /800mhz has a max bandwidth of 6.4GB/s, single channel DDR 400/800 has 3.2GB/s.

Read!!!!!!!!!!!!!.............Fill your head and stop giving bad advice.

Dual Channel will always be faster. Next time your playing BF2 and it takes a long time to load, ask your self if your single channel is slower????


http://www.kingston.com/newtech/MKF_...whitepaper.pdf

http://www.digit-life.com/articles2/...ma-fsb266.html
Way to look like an idiot. Do a search, our systems do not benefit from Dual Channel. I have done memory bandwidth tests with two identical sticks, and with only one stick, both yielded nearly identical resulsts.
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post #9 of 34
6/16/05 at 1:01am
Quote:
Originally Posted by ZippoMan
Way to look like an idiot. Do a search, our systems do not benefit from Dual Channel. I have done memory bandwidth tests with two identical sticks, and with only one stick, both yielded nearly identical resulsts.
Yeah he just humilated himself worse than how the guy says HUMILIATION in Unreal Tournament 2004
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post #10 of 34
6/16/05 at 1:34am
Quote:
Originally Posted by MichaelX30
Yeah he just humilated himself worse than how the guy says HUMILIATION in Unreal Tournament 2004
Exactly
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post #11 of 34
6/16/05 at 10:43am
Not all applications benifit from Daul Channel. Intel's own estimation is a 15% gain over all, some applications are higher some are no gain at all.

What did you test with?
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post #12 of 34
6/16/05 at 10:46am
These Centrino Sonoma mobile CPU processor are supported by the Intel 915GM chipset now supports both DDR & DDR2 memory up to DDR2 553 in dual-channel mode for a bandwidth of 8.5GB/sec or 4.2GB/sec in single-channel mode.[i]

http://www.gen-x-pc.com/cen_doth_alv.htm
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post #13 of 34
6/16/05 at 10:47am
Another significant change with the Sonoma chipsets is an increase in bus speed from the 400MHz of the Centrino up to 533MHz. The front side bus speed, and its corresponding influence on memory bandwidth, was one of the areas where the Centrino and the Pentium M were being left well and truly behind by the desktops, so this increase in speed is quite significant. The increase in front side bus speed also comes along with the addition of dual channel DDR2 533 support. This will make the Sonoma a better performer in memory intensive applications, such as games, but also in highly multitasking environments.

http://www.pcauthority.com.au/print....=21420&SIID=10
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post #14 of 34
6/16/05 at 10:49am
Notw?
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post #15 of 34
6/16/05 at 10:53am
The first generation Centrino chipset, 855GME, only supported single-channel operation with DDR 333 memory and a peak bandwidth of 2.6 GB/s. For the new platform and its higher peak bandwidth, a DDR2 interface was absolutely necessary to avoid having the CPU wait on the main memory to deliver data. Intel decided to support DDR2 memory with speeds up to 533 MHz and dual-channel operation. As the following table shows, in single channel operation the DDR2 533's bandwidth would be sufficient to keep the CPU happy with enough data flow - at least when working with a dedicated graphics solution.


http://www.tomshardware.com/mobile/2...alviso-03.html
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post #16 of 34
6/16/05 at 10:56am
The new platform is up to 15% faster only in synthetic memory tests. At the end of the day, the new 915PM chipset-based platform is faster, but not by a lot.

http://www.tomshardware.com/mobile/2...alviso-23.html
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post #17 of 34
6/16/05 at 10:56am
Need more?
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post #18 of 34
6/16/05 at 11:20am
How about you running any test to show any performance improvement.
I have done game benchmarks and synthetic benchmarks and have seen no performance advantage one way or the other.
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post #19 of 34
6/16/05 at 11:37am
Could be true, but would give advice to someone spending money NOT to go with a Dual Channel configuration??

I see alot of "ify" advice floating around these forums. Lucky for the orginal poster, that the only way to get the 2gigs he wants is in a Dual Channel configuration.
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post #20 of 34
6/16/05 at 4:44pm
Quote:
Originally Posted by Lindy
I see alot of "ify" advice floating around these forums.
LOL. Welcome to the web. You're telling me!? Never visit www.doityourselfheartsurgery.com. messy.

But seriously, if you find any definitive proof showing the benefits of dual channel in any real world setup for the pentium m, please post. Your quotes seem to address the 533 vs 400 rather than single vs dual in 533 only.
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