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What voltages to adjust for tighter timings? - Page 3

post #21 of 27
Thread Starter 
My RAM is supposed to be 1866 9-10-9-28-2T. That's probably why I can't go any higher but then again I didn't choose this kit. It happened to come with a secondhand AMD FM1 set I bought and I liked the fact it was 16GB compared to my old 8GB kit. All I have to do is try to max performance on the kit.
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post #22 of 27
I say if you can 1T them in the bios at those timings you'll be good... the 1T provided the biggest noticeable increase for me, instant page loads and better bench ect.

I am not too knowledgeable, I was guided to memory with certain timings and mhz as you are in this thread... I went looking for timings as was laid out, then I chose a manufacturer... I was steered straight thumb.gif
post #23 of 27
DRAM and IMC (vtt,vccio..etc.)
 
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post #24 of 27
Thread Starter 
I've been playing with it yesterday evening again but I cannot for the love of god get anything stable frown.gif

I pushed voltages way outside of my own comfort zone just for testing and it still wouldn't stabilize.
All I got was 9-12-11-28-1T on 2133Mhz but it took a whopping 1.780v DRAM to get CAS 9 stable for 500% memtest and i aint planning to run that on a Sandy long-term smile.gif

Also tweaking them for speed, 2400Mhz took a massive 1.2375v VCCIO to even get through Windows boot with 16GB...

So I guess i've hit rock-bottom max for these chips at 10-11-10-30-1T and i'll leave them there just cause it takes just 1.600v DRAM and 1.0875v VCCIO to be 1000+% memtest stable.
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post #25 of 27
Quote:
Originally Posted by Imprezzion View Post

I've been playing with it yesterday evening again but I cannot for the love of god get anything stable frown.gif

I pushed voltages way outside of my own comfort zone just for testing and it still wouldn't stabilize.
All I got was 9-12-11-28-1T on 2133Mhz but it took a whopping 1.780v DRAM to get CAS 9 stable for 500% memtest and i aint planning to run that on a Sandy long-term smile.gif

Also tweaking them for speed, 2400Mhz took a massive 1.2375v VCCIO to even get through Windows boot with 16GB...

So I guess i've hit rock-bottom max for these chips at 10-11-10-30-1T and i'll leave them there just cause it takes just 1.600v DRAM and 1.0875v VCCIO to be 1000+% memtest stable.

You could run 1.78 24/7 don't worry.

By the way I notice someone saying about using prime for testing wrong. That should not be done, even with Large FTTs prime wont use all your RAM. Best way to test RAM is with memtest+ outside the windows environment.
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post #26 of 27
Hey ..Don't worry about that "IMC vs DRAM must be close to" thing..That's a load of horse manure.
Give your RAMs watever voltage they want to be stable. smile.gifthumb.gif
IMC voltage probly doesn't have to be too high..i think I used to set 1.135 or so..
Edited by Schmuckley - 9/26/13 at 11:53am
 
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post #27 of 27
Thread Starter 
Well, I fixed it. It's called a Sandy Bridge-E chip tongue.gif

It appears my IMC was just incapable of running 2133C9 or 2400C11 on the 2500K / 2600K

This 3820 I got now easily does 2333Mhz (x1.25 bclk) on 11-12-11-30-1T 1.750v DRAM, 1.15v VTT and 1.04v IMC / VCCSA.
Also, 2000Mhz 9-10-9-27-1T 1.72v with the same VTT / IMC voltages is stable as a rock.

2133Mhz is something I can't set on my divider of x1.25 but i'm happy with 2333 at these quite reasonable timings.

Also, 2666Mhz works fine with 1.80v DRAM but timings have to be as high as 12-13-13-36-1T so it's not really useful I guess.
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Thundahcat.
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