RAM latency question

JLV2k5 · 07-10-2008, 08:13 PM

I have come to understand that the smaller(lesser) your latency, the faster things are going which is good, obviously. So CAS 2.0 seems the be about the best RAM right now, but when I look at RAM on Newegg.com and tier them according to price, the most expensive(and I am assuming best quality) Ram has larger latencies, like 7-7-7-20 and even 9-9-9-27. I don't get it.

Someone will know the answer, thanks.

**Cromewell** · 07-10-2008, 10:12 PM

Have a read through this post http://www.computerforum.com/87687-post8.html. The bit at the end is what you are looking for.

cRABu · 07-10-2008, 11:50 PM

the bigger the capacity, the larger the latenncy. This is natural, it takes more time to search for a piece of data in 2gs of ram then in 512 ram. So this is why.

hackapelite · 07-11-2008, 02:11 AM

Quote:

Originally Posted by cRABu

the bigger the capacity, the larger the latenncy. This is natural, it takes more time to search for a piece of data in 2gs of ram then in 512 ram. So this is why.

Huh? The capacity has hardly anything to do with the latency...

@JLV2k5 - The most expensive RAM modules are probably DDR3 or ECC ram, and I would think these are what you were looking at. DDR3 as a fairly new technology naturally has high latencies, just like DDR2 when it was first introduced. ECC ram, which is for servers&stuff, is very reliable but expensive and come with high latencies as well (due to this error-correction whatnot which takes a bit of time).

JLV2k5 · 07-11-2008, 04:18 PM

thanks guys

07-10-2008, 08:13 PM	#1 (permalink)
JLV2k5 Diamond Member Join Date: Dec 2007 Location: University of Delaware Age: 22 Posts: 1,317	RAM latency question I have come to understand that the smaller(lesser) your latency, the faster things are going which is good, obviously. So CAS 2.0 seems the be about the best RAM right now, but when I look at RAM on Newegg.com and tier them according to price, the most expensive(and I am assuming best quality) Ram has larger latencies, like 7-7-7-20 and even 9-9-9-27. I don't get it. Someone will know the answer, thanks. __________________ Can't wait to finish college and build my system.

07-10-2008, 10:12 PM	#2 (permalink)
Cromewell Moderator Join Date: Dec 2004 Location: Canada Age: 26 Posts: 11,802	Have a read through this post http://www.computerforum.com/87687-post8.html. The bit at the end is what you are looking for. __________________ You know what the chain of command is? It's the chain I go get and beat you with 'til ya understand who's in command here. www.userfriendly.org

07-10-2008, 11:50 PM	#3 (permalink)
cRABu Silver Member Join Date: Mar 2008 Location: At the other side Age: 21 Posts: 173	the bigger the capacity, the larger the latenncy. This is natural, it takes more time to search for a piece of data in 2gs of ram then in 512 ram. So this is why. __________________ Grandfather of all knowledge

07-11-2008, 04:18 PM	#5 (permalink)
JLV2k5 Diamond Member Join Date: Dec 2007 Location: University of Delaware Age: 22 Posts: 1,317	thanks guys __________________ Can't wait to finish college and build my system.

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