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1GB Dual Channel vs 1.25GB non Dual Channel?

post #1 of 19
12/14/05 at 11:08am
Thread Starter 
Hi,
What would be a better memory configuration?

1GB (512MBx2) Dual Channel

or

1.25GB (1GB + 256MB) non dual channel (1GB from newegg and a 256MB that came with my laptop).

I don't game at high video settings.

Thanks
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post #2 of 19
12/14/05 at 11:10am
I would go with 1.25GB as it's cheaper, the pentium-m doesn't benefit much from dual channel at all.

John
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post #3 of 19
12/14/05 at 1:52pm
Thread Starter 
So dual channel doesn't have a noticable performance increase?
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post #4 of 19
12/14/05 at 2:02pm
Not for Pentium M's, there isn't.
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post #5 of 19
12/14/05 at 2:11pm
Thread Starter 
OK, thanks.

I will get an extra 1GB from newegg, and use a 256MB (266MHz) that came with my laptop.
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post #6 of 19
12/14/05 at 5:54pm
run everest, you'll see that the difference is negligible. it has to do with the 533FSB
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post #7 of 19
12/14/05 at 7:17pm
Keane3 has been advertising this ram like no other. Supposed to be good stuff and at this price why not just jump to 2 gigs.
http://www.newegg.com/Product/Produc...82E16820208312
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post #8 of 19
12/14/05 at 7:42pm
Quote:
Originally Posted by @ftermath
Keane3 has been advertising this ram like no other. Supposed to be good stuff and at this price why not just jump to 2 gigs.
http://www.newegg.com/Product/Produc...82E16820208312
That link doesn't work. I think you mean this: http://www.newegg.com/Product/Produc...82E16820208312
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post #9 of 19
12/14/05 at 8:36pm
Thanks
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post #10 of 19
12/17/05 at 11:28pm
I would say 1 gb dual channel because thats what I have and it sounds cooler when you tell your friends that you have it.
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post #11 of 19
12/18/05 at 4:54am
Lol, bragging rights are always good
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post #12 of 19
12/18/05 at 9:49am
Quote:
Originally Posted by killah21
I would say 1 gb dual channel because thats what I have and it sounds cooler when you tell your friends that you have it.
You can run dual channel with the 1GB stick, here is my ram:



It's running the non-interleaved mode but you can see it's still dual channel. 2x 512MB is a bad idea because if you ever want to upgrade, you're going to need to dump another two modules, which is rather daft just for the sake of 'sounding cool'

John
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post #13 of 19
12/18/05 at 9:50am
Quote:
Originally Posted by r_kt
run everest, you'll see that the difference is negligible. it has to do with the 533FSB
It's nothing to do with the FSB, it's because the Pentium-m has a short pipeline and a large low latency cache, making it far less dependent on dual channnel compared to the bandwidth hungry P4.

John
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post #14 of 19
12/18/05 at 10:11pm
Thread Starter 
Quote:
Originally Posted by Johnmcl7
You can run dual channel with the 1GB stick, here is my ram:



It's running the non-interleaved mode but you can see it's still dual channel. 2x 512MB is a bad idea because if you ever want to upgrade, you're going to need to dump another two modules, which is rather daft just for the sake of 'sounding cool'

John
I thought dual channel had to be the same kind of memory? a 1GB and a 256MB make dual channel?
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post #15 of 19
12/18/05 at 10:43pm
I do remember reading that the 6000D reported Dual Channel all the time, even when it technically wasn't. Something to do with the FSB being 533Mhz (same as RAM speed) that Dual Channel wouldn't have an effect. Just something I remember, might not be right though.
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post #16 of 19
12/18/05 at 10:57pm
Quote:
Originally Posted by BlueLaptop
I thought dual channel had to be the same kind of memory? a 1GB and a 256MB make dual channel?
I think you do need same kind module to be dual channel.

This is an explanation for desktop motherboards.
http://www.intel.com/support/motherb.../cs-011965.htm
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post #17 of 19
12/18/05 at 11:02pm
Some helpful tips:
http://www.notebookreview.com/default.asp?newsID=2612
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post #18 of 19
12/19/05 at 12:20am
Well I think the Intel 915PM chipset supports asymmetric dual channel - As long as they are the RAM is the same speed. Having 2 identical sticks will, of course, enable symmetric dual channel.
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post #19 of 19
12/19/05 at 10:08am
Quote:
Originally Posted by MitchellO
I do remember reading that the 6000D reported Dual Channel all the time, even when it technically wasn't. Something to do with the FSB being 533Mhz (same as RAM speed) that Dual Channel wouldn't have an effect. Just something I remember, might not be right though.
The FSB speed is not the same as the ram speed - if you check your divider on a 533Mhz Dothan you'll see it's running 2:1 with DDR2-533 ram

John
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