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help picking a new Memory ram ddr3

Hi I just bought this mobo GA-970A-DS3P
http://www.amazon.com/gp/product/B00DJ3DWN2/ref=oh_details_o00_s00_i02?ie=UTF8&psc=1

(I'm doing some upgrading to my pc :D)
But I forgot that my PC right now has ddr2 and obviously this mobo is ddr3.
So I got a few questions ..
I want to buy a ddr3 8gb corsair, but I see so many prices and little to no difference.
Can anyone explain me the difference please.
http://www.frys.com/product/6552683?site=sr:SEARCH:MAIN_RSLT_PG

http://www.frys.com/product/7004851?site=sr:SEARCH:MAIN_RSLT_PG

http://www.frys.com/product/6902177?site=sa:adpages%20page:P7_FRI%20date:040414

Or anything that u guys will recommend , the cheaper the better lol(but not in quality :D)
So can anyone help me out with some knowledge plz


PD: I gotta buy the memory ram in a local frys, but they do price match with online retailers like newegg and amazon, the only thing is that the model # has to be the same.

Thank you so much for your time!
2 answers Last reply Best Answer
More about picking memory ram ddr3
  1. Well all three are 1600MHz speed, the first two are dual channel while the third in single channel DRAM. The only difference I can see is the heat spreader between the first two, but the CL timings may be different as well.
  2. Best answer
    The 2x4GB sets are basically simply packaged w/ different heatsinks, the one set is lower profil for more common use if you have a large CPU cooler, the 2x4GB sets can run dual channel which can provide up to a 10% or so increase in performance over a single channel (1 stick here) selection, which is nice, especially with AMD rigs as they have a relatively weaker MC (memory controller) than Intel CPUs have
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