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post #51 of 64
So in theory my tRC set to my bare minimum with is 13 should be crashing me but my TRC @ 13 hasn't been crashing me, at all, and passed memtest, pi, and others?

Add CL+tRAS and you get a safe measure of all three cycles; add CL+tRCD and you get what should be your tRC if your chips can handle it.


EDIT: My 1600 runs @ 1600 @ 7-6-6-20-13-1T, without errors. But those are my chips, I can't speak for his. That's why I said 24 instead of 18.
    
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post #52 of 64
Thread Starter 
oooooo i understand now.. can you explain more about how it work with ram timing. that way i can get more understand and be more experienced
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post #53 of 64
From this page...

http://www.techpowerup.com/printarticle.php?id=131

tRC Timing: Row Cycle Time. The minimum time in cycles it takes a row to complete a full cycle. This can be determined by; tRC = tRAS + tRP. If this is set too short it can cause corruption of data and if it is to high, it will cause a loss in performance, but increase stability.
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post #54 of 64
Quote:
Originally Posted by coonmanx View Post
From this page...

http://www.techpowerup.com/printarticle.php?id=131

tRC Timing: Row Cycle Time. The minimum time in cycles it takes a row to complete a full cycle. This can be determined by; tRC = tRAS + tRP. If this is set too short it can cause corruption of data and if it is to high, it will cause a loss in performance, but increase stability.
Yes, and that's safe cycling of the paging. But, if your RAM can access it's row without having to recharge it and other cycles, you can lower your tRC to take advantage of that. That's why the minimum is CL+tRCD. Doesn't mean all chips and setups can do this.
    
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post #55 of 64
Thread Starter 
thanks for this guide. i'm reading it right now.
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post #56 of 64
Thread Starter 
hmm allright! somehow i feel better just knowing it now. to be honest. i built my pc last thursday....lol
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post #57 of 64
Here, this is a much more in-depth guide to how RAM actually works. Although it's aimed at the Intel side it still pertains to AMD as RAM is still operating the same.

It's got great detail and will help you understand the RAM cycling process. Very well put together but it does take a little comprehension.
    
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post #58 of 64
In the end, I guess that if you can set it to a certain value and it stays stable that's all that matters. But that begs the question as to why the manufacturer doesn't then recommend those timings. Isn't that something that they would want to advertise? I'm one to err on the side of stability anyway.

I have to get to bed.
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post #59 of 64
coonmax ~

It's because they want their RAM to function on as many systems as possible. So loose performance is better than non-compliance with the board.
    
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post #60 of 64
Thread Starter 
hmmm i understand.. i got this ram from motherboard's qualifited list for memory list.
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