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Speeds: DDR3-800 And -1066

LGA 1156 Memory Performance: What Speed DDR3 Should You Buy?

DDR3-800 is probably irrelevant in the consumer space. No one would think of purchasing this slow memory given today’s nonexistent price differences versus DDR3-1066. However, since binning for slow memory can help a manufacturer increase its yield, we’re still seeing some low-cost business PCs still shipping with this memory type. In addition, notebook designs may opt for slower clock speeds in order to reduce power consumption.

We first used DDR3-800 at CL6-6-6-18 speeds.

Since there are various types of DDR3-1066 memory available, we decided to run it at slow CL8-8-8-24 timings first, which can be considered average. This is what you’ll usually get when you buy an ordinary office PC with DDR3 memory.

Next, we ran the DDR3-1066 at faster CL6-6-6-18 timings. Although most memory should be capable of running at these speeds, you should probably look for vendor-specified fast timings rather than overclocking, just to be on the safe side, especially if you're hoping for even higher data transfer rates.

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  • 2 Hide
    augustus_77 , 9 December 2009 07:48
    I think the advantage of DDR3-1600 is not in the memory speed, but that the multiplier-locked CPU can be overclocked to a much higher frequency than DDR3-1066 would permit. This will result in the tremendous performance gain of DDR3-1600 over DDR3-1066.
  • -2 Hide
    jamac666 , 9 December 2009 20:43
    I love DDR3! It's such fast ram and mine is only 1333mhz. Well worth the upgrade from ddr2.
  • 0 Hide
    acecooper , 10 December 2009 03:39
    how long are the adobe encoding program settings for? (premiere)
  • 1 Hide
    damian86 , 10 December 2009 06:07
    Thanks a lot guys,that was a usefull guide if you are wondering what memory you will get.Why are you showing all the benchmarks in percentages?
    in the games,mp3 encoding,rar?you could give us a precise result by showing it on fps,minutes and secs,scores, doesn't really help if you say "Percent(more is better)".not offence,just trying to help.
    I took your advise anyway.Thanks
  • 0 Hide
    vernoncougar , 10 December 2009 14:36
    I've got core i7 860 with team xtreem 8GB 1600mhz memory,i am happy with it.
  • 0 Hide
    redkachina , 10 December 2009 15:56
    Great, I'm still torn between lots of DDR3 brands for my next i5 750 / PII 955 builds, clearly that the difference between each RAM speed is not that I'm going for the cheaper ones!
  • 0 Hide
    Black3ird , 5 March 2010 14:45
    Apart from my supplier not haveing a few of the compared items for sale, this was great help in deciding, thanks!