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post #861 of 2062
Quote:
Originally Posted by kubed_zero View Post

What's the difference between 1T and 2T? I thought 1T was used because it's easier to achieve stability. Maybe I'm wrong though biggrin.gif

Yeah, I'm also interetested in this!

I know that the 11-11-11-30 or whatever is, just the response time of the ram yeah?
What are the others? Does anyone have a guide to ram timings? thumb.gif
 
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post #862 of 2062
Regarding command rate: 1T is harder to stabilize, generally much harder with two DIMMs per channel, but it's faster. 2T is somewhat slower, but often required for higher speeds at higher densities.

Many people only both with CAS-tRCD-tRP-tRAS, but they usually aren't using their memory to it's full potential. There are dozens of memory timings, and they all do something different. Plenty of information around if you search for it.
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post #863 of 2062
Is it safe to use these Samsung 30nm kits at 1.5v 24/7?
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post #864 of 2062
Quote:
Originally Posted by Yor_ View Post

Is it safe to use these Samsung 30nm kits at 1.5v 24/7?

 

Should be just fine, they default to 1.5v, you can just lower them to 1.35v for decrease power draw. But I'm running mine at 2000mhz 9-9-9-24-1T @ 1.5v. Stable so far. That's pretty darn good lol.

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post #865 of 2062
Quote:
Originally Posted by Blameless View Post

Regarding command rate: 1T is harder to stabilize, generally much harder with two DIMMs per channel, but it's faster. 2T is somewhat slower, but often required for higher speeds at higher densities.
Many people only both with CAS-tRCD-tRP-tRAS, but they usually aren't using their memory to it's full potential. There are dozens of memory timings, and they all do something different. Plenty of information around if you search for it.

So would that explain why I can't get my 16GB of this ram stable at 2133 on a Z68 platform?
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post #866 of 2062
Quote:
Originally Posted by trendy View Post

Should be just fine, they default to 1.5v, you can just lower them to 1.35v for decrease power draw. But I'm running mine at 2000mhz 9-9-9-24-1T @ 1.5v. Stable so far. That's pretty darn good lol.

That's excellent, because I am not having the same luck. I have to raise IMC voltage to near 1.050v if I want to keep them stable at 1866 9-9-9-24-1T 1.5v, 16GB (4x4GB modules) in Prime95 blend (errors).

Is raising IMC voltage dangerous?
Can you guys give me tips on overclocking this modules on my UD5H?
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post #867 of 2062
Quote:
Originally Posted by Yor_ View Post


That's excellent, because I am not having the same luck. I have to raise IMC voltage to near 1.050v if I want to keep them stable at 1866 9-9-9-24-1T 1.5v, 16GB (4x4GB modules) in Prime95 blend (errors).
Is raising IMC voltage dangerous?
Can you guys give me tips on overclocking this modules on my UD5H?

 

I'm not familiar enough with these newer platform's overclocking capabilities to be sure, but I think I read somewhere that raising the IMC voltage isn't necessary because of the way the memory controller operates. I could be wrong though.

 

Edit:

 

According to Sin's OCing guide, the max you should pull on IMC using Air Cooling is 1.2v.

 

Source


Edited by trendy - 6/5/12 at 12:34pm
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post #868 of 2062
K guys... I need some advice here. I have had a bunch of help already, but think a little more would be beneficial.

I am getting quite frustrated with my new build. I have never overclocked the RAM before, and decided to this time and it has only brought me troubles. I am hoping you guys can help me out here and get me more comfortable with it.

I have tried my RAM at nearly every setting that I can find that people have posted with no luck. The system is yet to even start up with the settings I find. It sometimes even takes a few restarts to just get into the UEFI.

The timings I have tried that failed (there are more, but here are just some that appear lots of places):
9-9-9-24 1866 MHz @ 1.5V
10-10-10-28 2133MHz @ 1.5V (I even tried 1.6V with no luck)
11-11-11-28 2133 MHz @ 1.4V
12-12-12-30 2400 @ 1.55 V with a 1.178 VTT

I am currently stress testing what is in italics below (12-12-12-30 2400 @ 1.57V).

Here are my settings (The first 4 deal more with memory, the last 4 deal more with general settings, I figured all might help):
Note that a few have changed since I took these:
DRAM Freq now at 2400
Fixed Voltage at 1.22V
CPU Load-Line is Level 2
DRAM Voltage is 1.57V
VTT Voltage is 1.178V
Memory Timings are 12-12-12-28
CPU PLL Voltage is 1.586V which is the minimum
Screenshots (Click to show)
448

448

448

448

448

448

448

448

I don't really know what the next step should be to do? What timings should I try? I am a little overwhelmed whether I should decrease the speed, or loosen the timings (if that is the correct terminology), or increase the voltage.

ALL help is welcome.

Thanks in advance!
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post #869 of 2062
Quote:
Originally Posted by kubed_zero View Post

Well, I haven't gotten a stable timing at 2133, when I tried 10-10-10-28, and 11-11-11-31, both of which were at 1.5v. I've left all the secondary and third timings on auto, so could that be a problem? I have a maximus IV Gene-Z motherboard, so the options for overclocking are super extensive.

Try 9-10-10-28-96 with 1.52v biggrin.gif
96=trfc.er.."row refresh cycle time" or something like that

well..first of all..lower CAS down to 9 and see if you can boot :thumb.gif:
If you can..probably good to go..if not..use 10

also..set your "vtt/vccio" to 1.11-1.14..as Mr.FTW said..That's the IMC voltage, which is set too low @ 1.05 by default.
Edited by Schmuckley - 6/5/12 at 6:10pm
 
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post #870 of 2062
Hey guys I have these running in my newly built rig. Can someone be kind enough and shoot my in a direction that can help me learn to overclock these bad boys?
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