How to choose a good memory. - Overclock.net - An Overclocking Community
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How to choose a good memory.

 
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post #1 of 4 (permalink) Old 08-20-2009, 01:10 PM - Thread Starter
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hello comunity. i'd like to know how to choose a good memory, so i dont have to bother u so much as i usually do.
i give this one as an eg.
http://www.pcdiga.com/pcdiga/Produto...re&Artigo=5396


so now, how can i rate it? more voltage = better or worst?
4-4-4-12 is better than 5-5-5-15 or worst?
stuff like that.

ddr3 or ddr2? what is ddr anyway? and that "nm" everyone talks about? what is it?

ty in advance

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post #2 of 4 (permalink) Old 08-20-2009, 01:18 PM
 
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DDR stands for Double Data Rate. DDR2 RAM is twice as fast as DDR RAM. DDR3 RAM is twice as fast as DDR2 RAM.

Less voltage is better, because when you use less voltage to get to the same clock on any component, the component uses less power to run at that speed, and produces less heat.

4-4-4-12, or other similar numbers is the CAS latency of the memory. Lower is better.

"nm" stands for nanometer, and it measures the die of PC components. For example, my E2140 is a 65 nm processor, and my 2400 HD is a 90 nm GPU. An i7 920 has a 45nm die, and an ATI 4770 has a 40 nm die.
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post #3 of 4 (permalink) Old 08-21-2009, 05:27 AM - Thread Starter
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hum... lets see if i got it.

this ddr3 have a 6-7-6-18 and work at 1,65v
http://www.pcdiga.com/pcdiga/Produto...re&Artigo=6307

and this one have a 9-9-9-24 and work at 1,65v
http://www.pcdiga.com/pcdiga/Produto...re&Artigo=5392

so the 1st one is better than the second one right?

but compared to the ddr2 one that works at 4-4-4-12 and work at 1.8~1.9v which one is better?
http://www.pcdiga.com/pcdiga/Produto...re&Artigo=5396

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post #4 of 4 (permalink) Old 08-21-2009, 07:35 PM
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get platinum lv's.

you'd have to stick around more to figure that out.

ddr2 and ddr3 aren't much different. but once you get tri channel x2. you'll notice it

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