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Z77 Vccsa using 1.65v memory question

post #1 of 9
Thread Starter 
I am using a ddr3-2200 kit and it's 1.65v.

It's unstable at overclock and I am guessing I need a tiny bit more vccsa (mem controller) voltage.

Is there anything I should be worried about 1.5v vs 1.65v and vccsa?

I was told by mfg to up it to 1.1v from 0.925
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post #2 of 9
It'll be fine, I've used 1.65V kits all through sandy bridge, sb-e & now Ivy. 1.1V vccsa should do the trick, I can run 2600Mhz with a 1.65V mem kit at vccsa/vccio at 1.11V when the cpu is under 5Ghz.
    
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post #3 of 9
Thread Starter 
Quote:
Originally Posted by FtW 420 View Post

It'll be fine, I've used 1.65V kits all through sandy bridge, sb-e & now Ivy. 1.1V vccsa should do the trick, I can run 2600Mhz with a 1.65V mem kit at vccsa/vccio at 1.11V when the cpu is under 5Ghz.

Patriot is telling me I can feed the memory 1.75v-1.9v to get the overclock, would there be any worries about
all that voltage and the ivy bridge onboard mem controller?
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post #4 of 9
I've only gone to 1.75V personally on a 3770k so far, although you can see from some of the results in this thread http://www.xtremesystems.org/forums/showthread.php?280903-SuperPi32m-5Ghz-Ivy-All-Out-Challenge quite a few people have run up to 1.9V or more. These aren't 24/7 overclocks though, haven't heard anything yet about ivy being damaged from mem voltage. I would try to find a decent memory speed at 1.7V vdimm or so for 24/7 to be on the safe side (bit more or less would be OK), you can always turn it up & OC the memory higher when you have the need for speed.

Edit: Memory OC also depends on the IMC of the cpu, I've had 2 x 3770k that will run 2800Mhz + memory, the one 3570k I tried could only manage 2240Mhz memory max (same kit I used with the 3770ks, with more voltage). I have heard of another that wouldn't do 2000Mhz. You can try pushing the memory, but if the IMC can't do it it won't help to keep throwing vdimm at it.
Edited by FtW 420 - 6/19/12 at 1:59am
    
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post #5 of 9
Thread Starter 
Quote:
Originally Posted by FtW 420 View Post

I've only gone to 1.75V personally on a 3770k so far, although you can see from some of the results in this thread http://www.xtremesystems.org/forums/showthread.php?280903-SuperPi32m-5Ghz-Ivy-All-Out-Challenge quite a few people have run up to 1.9V or more. These aren't 24/7 overclocks though, haven't heard anything yet about ivy being damaged from mem voltage. I would try to find a decent memory speed at 1.7V vdimm or so for 24/7 to be on the safe side (bit more or less would be OK), you can always turn it up & OC the memory higher when you have the need for speed.

I just can't get this damn ram stable. On p67 it was 2200mhz no problem, Z77 it won't even do the spec 2000,
even with vccsa at 1.1v , it just wants more voltage. I guess I need to sell it and get lower voltage ram...
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post #6 of 9
A 16Gb kit, is it 4 x 4Gb or 2 x 8Gb? I haven't actually tried Ivy with 4 modules in the board, not sure how much it affects things.
    
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post #7 of 9
Thread Starter 
16gb kit, I had to drop it to 1866 , it refused to work at xmp or manual set for the correct speed, I am guessing it wants 1.75v to work and
I am not willing to do that.
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post #8 of 9
try to rise your VCCIO- (VTT)=>1.1~1.2v or loosen up your timings in return for frequency wink.gif
Edited by coolhandluke41 - 6/21/12 at 7:10am
    
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post #9 of 9
Quote:
Originally Posted by ASSEMbler View Post

I am using a ddr3-2200 kit and it's 1.65v.
It's unstable at overclock and I am guessing I need a tiny bit more vccsa (mem controller) voltage.
Is there anything I should be worried about 1.5v vs 1.65v and vccsa?
I was told by mfg to up it to 1.1v from 0.925

Quote:
Originally Posted by coolhandluke41 View Post

try to rise your VCCIO- (VTT)=>1.1~1.2v or loosen up your timings in return for frequency wink.gif

What is maximum for ivy bridge for vccio, thank you answer.
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