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How to tighten timing?

post #1 of 14
Thread Starter 
I have a stable 20hr OC @ 3.75 (417x9) - vcore: 1.328v. I left memory timing on auto and running PC8500 ram at 834Mhz at 1:1.

Is there a how-to/tutorial that you might have used that shows how to tighten the timing. Do I need to tighten all the numbers at once? Is there a ratio? Do I need to watch the voltage? How can to check for errors? (possibly Orthos, Prime95, memtest?)

Should I try tightening the timing first or try to change the divider for higher memory clock?

Any info would be great. Thanks.
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post #2 of 14
A pretty simple way to tighten your timings is to determine the max voltage (recommended, max, whatev) on your memory (mine is 2.2v), set it at or slightly under that voltage, then where you have all the memory settings (numbers) determine what your sticks default settings are. Mine are 5-5-5-15-2t, which aren't very tight at all, but its doable. Then slowly tighten your memory up, running memtest as needed, until you get your desired memory settings.

That is like the most overgeneralized/unspecific post I think I've ever posted.

Fail.
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post #3 of 14
Thread Starter 
Thanks, sounds like a plan

Here is my ram:
http://www.ocztechnology.com/product...n_dual_channel

They are listed as 2.1 - 2.3** Volts
**Do not exceed 2.1V specification if listed on the module label
And newegg lists them at 2.3v.

Kinda conflicting...so what's my max?
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post #4 of 14
2.1v max for warranty, 2.3v max for chip.
post #5 of 14
Thread Starter 
Quote:
Originally Posted by alwaysAMD View Post
2.1v max for warranty, 2.3v max for chip.
Nice, Thx.
How would they know if I exceeded the voltage anyways? (suppose the ram starts to fail).
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post #6 of 14
I always wondered that too, but RAM is so cheap these days i'm not too worried about it.
post #7 of 14
Quote:
Originally Posted by Offspring2099 View Post
Nice, Thx.
How would they know if I exceeded the voltage anyways? (suppose the ram starts to fail).
Well, there's 2 things. Firstly, can you afford to go without memory while it's being RMA-d? Secondly, voltage increases don't tend to bring great improvements.

Use Memtest to test for stability. 3 iterations of test #5 is the best use of time, but 3 iterations of all 8 tests is 99% rock solid.

Simply go through your timings, one at a time. Decrease one value by 1, then stress test. If you pass, lower again. If you fail, raise by 1 then move on.
post #8 of 14
Thread Starter 
Quote:
Originally Posted by thealmightyone View Post
Well, there's 2 things. Firstly, can you afford to go without memory while it's being RMA-d? Secondly, voltage increases don't tend to bring great improvements.

Use Memtest to test for stability. 3 iterations of test #5 is the best use of time, but 3 iterations of all 8 tests is 99% rock solid.

Simply go through your timings, one at a time. Decrease one value by 1, then stress test. If you pass, lower again. If you fail, raise by 1 then move on.
Thank you,

Only 3 iterations? I remember checking if my ram was faulty(different rig) and was told to do it for 12hrs to 24hrs. Does more aggressive timing throws a wrench in the gear a lot quicker???
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post #9 of 14
Quote:
Originally Posted by Offspring2099 View Post
Thank you,

Only 3 iterations? I remember checking if my ram was faulty(different rig) and was told to do it for 12hrs to 24hrs. Does more aggressive timing throws a wrench in the gear a lot quicker???
Well, I run 3 iterations. You can run more if you want to, but I usually drop the memory oc speed a little bit instead after stability testing.

You can lower timings by more than 1 clock at a time, say 3 clocks, but if it fails, you still have to backtrack to find out the lowest number of clocks that is stable. Usually, just lower the timings that need lots of clock cycles by more than 1 at a time, such as trfc.
post #10 of 14
Thread Starter 
Quote:
Originally Posted by thealmightyone View Post
Well, I run 3 iterations. You can run more if you want to, but I usually drop the memory oc speed a little bit instead after stability testing.
Sorry I didn't get that....you lower your memory clock to tighten your timings???
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skynet2099
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