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Overclocked Ram Timings

Last response: in Memory
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January 17, 2011 5:07:51 PM

I have 4gb 2x2 of A-Data DDR3 1600 ram, running at 1600mhz. I am beginning to try to lower timings as much as possible, I have it stable down to 8-8-8-22 1T so far, but I don't know what to do with all of the other timings. Is there a basic guideline I could use to start out with like timings for cas 9, 8, 7 etc. Or do you just have to try lowering the numbers and running Memtest?
a c 241 } Memory
January 17, 2011 7:38:48 PM

Lower the numbers until unstable then come back a notch and run memtest.
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a c 163 } Memory
January 17, 2011 7:43:37 PM

The 1st one is the most important there, so, try lowering one by one and testing.
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a c 347 } Memory
January 17, 2011 8:24:54 PM

Typically, I don't mess around with the Command Rate, an my best guess it's 2N.

Next raise the Frequency; most of the time you can get away with 1600-> 1800 MHz if you have a good set of RAM {e.g. Dominator} and/or with good cooling. If you have 1.65v you may need to use DRAM Voltage 1.68~1.72+v, and raise the QPI/DRAM -> 1.32~1.38+v.

Yes, run Memtest and before checking off as okay run Memtest at least 2 passes, and Prime95. In my case, I run Prime95 overnight and with 'big' RAM OC I run Memtest overnight as well.

Test the increases with Super PI - http://virgilioborges.com.br/hyperpi/

Good Luck!
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January 19, 2011 3:53:12 PM

Okay guys thanks for the advice, that's pretty much what I figured. One more question, I remember about 10 months ago I heard something about an issue with the latest version of memtest and 4+Gb of memory. Does anybody know anything about that and is it fixed in the latest version?
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