Tom's Hardware > Forum > Motherboards & Memory > Memory > Timings vs clock speed - what's more important?
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elenius   06-17-2009 at 06:52:38 PM

I'm trying to figure out what type of DDR3 2x2 gb ram to buy for my new system. The CPU is a Phenom II X2 550 BE, and the motherboard is this one:

GIGABYTE GA-MA770T-UD3P
http://www.newegg.com/Product/Prod [...] 6813128392

It has a memory compatibility list here:
http://www.gigabyte.com.tw/FileLis [...] t-ud3p.pdf

Now, for about the same price, I can get:

G.SKILL DDR3 1600, cas latency 9, timings 9-9-9-24, 1.8V -- $65
http://www.newegg.com/Product/Prod [...] 6820231193

or e.g.

G.SKILL DDR3 1333, cas latency 8, timings 8-8-8-21, 1.65V -- $65
http://www.newegg.com/Product/Prod [...] 6820231189


Which one should I get? Is there a rule of thumb here to go for the higher clock? Or for the lowest latency? Other concerns?

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HundredIslandsBoy   06-17-2009 at 07:26:02 PM
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Higher clock usually wins over lower latency. Lots of stuff on Google about it. BTW, I get no cash from Google everytime I mention Google.

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elenius   06-17-2009 at 08:11:48 PM
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HundredIslandsBoy wrote :

Higher clock usually wins over lower latency. Lots of stuff on Google about it. BTW, I get no cash from Google everytime I mention Google.



Hmm, one of the reviews on newegg on the 1600 memory says that you can't use 4 of them in 1600 mode, only 1333. So if I want to upgrade my memory later to 8gb, maybe I would be better of getting low-latency 1333 memory, since that is all I'll be able to use anyway?

Is this limitation particular to this memory? Only for certain motherboards?

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HundredIslandsBoy   06-18-2009 at 01:03:16 AM
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There's also lots of stuff on Google regards benchmaks between 1333 and 1600 RAM. The difference is negligible - meaning it's so small like you get less than .3 (point three) percent difference in framerates.

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