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i5 3570k core differences in heat (update) - Page 4

post #31 of 85
Quote:
Originally Posted by cicero8 View Post

Thank you! did not know that happened with prime 95. XD.

Do you think it would be more beneficial to increase voltage to 1.27 (currently at 1.26) or to increase LLC from 25% to 50%? my voltage when im runing prime seems to go down to 1.224 on cpuz if you look at the picture.

It's better to increase LLC because it will compensate for the v droop of your current set voltage. I myself had to do it at 75% because my voltage was way off due to droop.

Also that vcore 1.27v for 4.4ghz is normal, if you take a look at my sig and my 3570k i used to have, i needed around 1.264v for 4.3ghz. You are within NORMAL ranges for these chips.
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post #32 of 85
Thread Starter 
ok il try that in a bit (about to hop in the showring and do a short reading for university. what causes droop anyways? does it vary by chip or is it more of a motherboard type of thing.
post #33 of 85
The VID is what the chip thinks it needs at that speed. You can use it as a guideline for what you'll need for stability, but it is not authoritative. It seems like more and more chips are taking something closer to 1.3V to hit 4.5, so needing 1.27V for 4.4 isn't out of the question.

Vdroop is caused by the CPU drawing more current under load, which causes the voltage to drop. It happens on all motherbaords, although the severity varies. LLC helps by increases the voltage to counteract the drop. You can increase LLC a notch to help keep the load voltage closer to what you have set, but don't set it so high that the load voltage ends up being higher than what you set in the BIOS (it can cause voltage overshoots on the load-idle transition).
Edited by Forceman - 1/22/13 at 4:58pm
post #34 of 85
Quote:
Originally Posted by cicero8 View Post

ok il try that in a bit (about to hop in the showring and do a short reading for university. what causes droop anyways? does it vary by chip or is it more of a motherboard type of thing.
I am not too sure. You see with my 3570k all i had to do was set llc at 25% to compensate for vdroop, for my 3770k i needed 75% to compensate for it. I am sure other members might know the answer.

EDIT: Lol someone answered vdroop for you already biggrin.gif
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post #35 of 85
Thread Starter 
I kept
Internal PPL voltage disabled
set voltage manual to 1.26
i changed LLC from medium (25%) to HIGH (50%)

Restarted up windows and now im at 1.256 with TINY spikes to 1.264 (so .004 over what i set in bios) does this seem acceptable to you for controlling voltage? This is with Prime95 off



going to run prime 95 and update

UPDATE: when i turn on prime 95 voltage changes to 2.4



no workers are crashing (im doing a 10minute test to check for initial stability)
Edited by cicero8 - 1/22/13 at 10:01pm
post #36 of 85
Quote:
Originally Posted by cicero8 View Post

I kept
Internal PPL voltage disabled
set voltage manual to 1.26
i changed LLC from medium (25%) to HIGH (50%)

Restarted up windows and now im at 1.256 with TINY spikes to 1.264 (so .004 over what i set in bios) does this seem acceptable to you for controlling voltage? This is with Prime95 off



going to run prime 95 and update

UPDATE: when i turn on prime 95 voltage changes to 2.4

Acceptable? Up to you, if it is stable then it should be acceptable. If it's still not stable try llc ultra high, that's where you should be at really (75%) to get the exact voltage you were aiming for without vdroop, because there is still some vdroop. If 75% goes OVER the desired voltage then change back to 50% and up the offset voltage up so your load voltage hit's the right voltage.
Edited by junkerde - 1/22/13 at 10:02pm
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post #37 of 85
Quote:
Originally Posted by cicero8 View Post

I kept
Internal PPL voltage disabled
set voltage manual to 1.26
i changed LLC from medium (25%) to HIGH (50%)

Restarted up windows and now im at 1.256 with TINY spikes to 1.264 (so .004 over what i set in bios) does this seem acceptable to you for controlling voltage? This is with Prime95 off

going to run prime 95 and update

UPDATE: when i turn on prime 95 voltage changes to 2.4

no workers are crashing (im doing a 10minute test to check for initial stability)

If it is stable (with 1.24V under load), I'd leave it there. The Intel specs call for some Vdroop, so as long as it isn't large enough to cause instability I wouldn't put it any higher.
post #38 of 85
Thread Starter 
just going to mention im on fixed voltage right now. im trying to find a stable 4.5 if possible under 1.3 volts for a 24/7 oc tongue.gif.

test 1. I was at 4.4 so i raised the multiplier to 45 with same settings, llc high and voltage 2.6 and biosd

test 2. Went back in and changed LLC to ultra high (75%) core voltage now is initially showing 1.264 and when i run prime its staying at 1.264!! WOHO. so LLC ultra high was a must...

test 3 tried voltage 1.255 with llc ultra high and prime 95 worker stopped

Test 4. set voltage back to 1.26 LLC ultra high, disabled internal PPL voltage. im noticing that th evcore in cpuz is 1.264 with ocasional jumps to 1.272. its going +0.012 over what i set in bio. would it be better to raise voltage and lower LLC or keep llc at ultra high and let the voltage go up +0.012 over bios settings. and prime 95 worker failed 10 minutes in.

test 5 set voltage to 1.265 and went into cpuz, noticed vcore was at 1.272 so i went back into bios and lowered llc to high and now vcore is at 1.264 in cpuz and bluescreened at prime 95.

i guess i really do need LLC to ultra high XD

i feel like 1.27 volts is kind of high? should i keep pushing for 4.5 or lower it to 4.4 in your oppinion? keeping in mind im trying to make this computer last me 3-4 years til im done university. not sure what safe voltages are on this chip

i plan on using offset once i find a stabble fixed OC.
Edited by cicero8 - 1/22/13 at 10:40pm
post #39 of 85
Thread Starter 
ran it through prime at 1.265 volt LLC ultra high cpuz was constantly at 1.272 and i had a prime worker go down so i think 4.4 is my sweet spot XD.i dont know if its too safe pushing those extra volts for 45 instead of 44 lol
post #40 of 85
Thread Starter 
currently at 1.235 volts LLC HIGH with cpuz showing 1.216 on load on prime 95. the jump between 4.4 and 4.5 is HUGE on my chip. 1.27 in cpuz not working at all at 4.5 to 1.216 working in cpuz at 4.4. WTH lol

update. im now at 1.23 LLC high cpuz showing 1.208 so i have some vdroop on there.

going back into BIOS and setting LLC to ultra high and see what it does, it increased voltage in cpuz to 1.240. and it was dropping to 1.232. since its not giving me any vdroop il keep at high.

going to run prime 95 on 1.235 volts LLC high overnight and see what i get. See you guys tomorrow. cpuz shows 1.232 (off by 0.002 so idont think its a big deal) at iddle and it shows 1.216 on load.
Edited by cicero8 - 1/22/13 at 11:34pm
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