Timings vs clock speed - what's more important?

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/Product.aspx?Item=N82E16813128392

It has a memory compatibility list here:
http://www.gigabyte.com.tw/FileList/MemorySupport/mb_memory_ga-ma770t-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/Product.aspx?Item=N82E16820231193

or e.g.

G.SKILL DDR3 1333, cas latency 8, timings 8-8-8-21, 1.65V -- $65
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231189


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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  1. 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.
  2. hundredislandsboy said:
    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?
  3. 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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