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Haswell Overclocking Guide [With Statistics] - Page 375

post #3741 of 19299
Thanks Chomuco.

Cyro - Bit late in the day to give a full explanation but that's my uncore finally stable at x42. Short version, don't increase IOA, increase IOD/SA only. And if vrin is down at the lowest stable setting for core clock, +.025v may well help. Need to investigate further when i have time, i.e, remove the +.025v i put on vrin, declare stable then drop SA/IOD and repeat till stability lost. (fyi, i have SA/IOD at +.15v right now but i suspect these could be lowered)

post #3742 of 19299
^Ty

Played a bit more. Can pass cinebench consistently now, which is worlds further than i was before, didn't try anything else.

But:

It only works with DIO added (which is nice to figure out) >WHILE< RAM is at a low clock. 2200 was hard failing consistently (0x0101 in cinebench) 1600 got me an error popup in cine first time i tried it and then a crash after a few runs (101..) 800 works seemingly flawlessly. Seems like IMC failing and giving 101 bluescreen perhaps

Didn't experiment for too long, and come to think of it my RAM was acting a tiny bit weird at 4.7ghz (2400 settings i swore were stable having major issues, which was why i was at 2200 on many of the same timings) gone back down to 4.7, will poke at a few things, and also trying RAM with a bit more RAM volts, +0.1+0.1 on sa/dio to see if RAM is stable and if i can be stable with a touch less vcore with the dio (considering i seem to need a whole lot just 100mhz up.. 5 runs in a row @+0.2, crashed both attempts @+0.1)
Edited by Cyro999 - 10/11/13 at 6:46pm
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post #3743 of 19299
Are you guys finding these stable OC's with all power saving settings enabled? or some enabled and disabled?
post #3744 of 19299
All enabled
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post #3745 of 19299
Thread Starter 
Quote:
Originally Posted by Shweller View Post

I am new to Haswell and PC building all together. I was able to achieve stable 4.5GHZ on my 4670K at 1.250V. I stress tested with Intel Burn, Prime 95 and AIDA 64 with a max temp of 93 degrees with an H100i on SP 120’s high performance edition fans. I am new to overclocking but felt I got lucky with a good chip. I run about 65 degrees average on Battlefield 4 beta at ultra-settings. I wish to join this OC club.

 

 

Quote:
Originally Posted by Shweller View Post


Thank you, I have some Antec Silver I will give it a try. I get about a 10 degree difference from core 1 to core 4 at times during stress test. What would be max allowable temp during Intel Burn (Very High) and/or Prime 95? Hopefully I can avoid de-lidding....or cut back voltage...

Hello Shweller. In case you have not noticed, the first post of this entire thread is my overclocking guide, that's what all the posts here are based around. So go ahead and give it a skim or a read if you want. It lists max safe temps at 95C. 95-100C is tolerable for short periods of time but not recommended. That 10C you experience in different temps is normal. While your settings are just fine at 4.5ghz, since 93C at Prime isn't dangerous either way, you'll be hard pressed to hit 4.6ghz doing the same exact stress test assuming you can lay down stability.

 

If you want to gun for 4.6, you'll have to switch to a nonsynthetic. I recommend x264.

Your CPU is just about average according to my statistic.

 

In order to be placed into the Haswell Overclocking Statistic, you only need to fill out the small form on the first page. If you want to have "picture verification" ticked, you also need the picture to contain HWInfo's Vcore reading (not VID), and some way to verify that you ran the test as long as you claimed you did.

 

Good luck.

Thanks for the info!

 

Quote:
Originally Posted by Doug2507 View Post

Thanks Chomuco.

Cyro - Bit late in the day to give a full explanation but that's my uncore finally stable at x42. Short version, don't increase IOA, increase IOD/SA only. And if vrin is down at the lowest stable setting for core clock, +.025v may well help. Need to investigate further when i have time, i.e, remove the +.025v i put on vrin, declare stable then drop SA/IOD and repeat till stability lost. (fyi, i have SA/IOD at +.15v right now but i suspect these could be lowered)

 

How many tests were done for this?

Quote:
Originally Posted by Cyro999 View Post

^Ty

Played a bit more. Can pass cinebench consistently now, which is worlds further than i was before, didn't try anything else.

But:

It only works with DIO added (which is nice to figure out) >WHILE< RAM is at a low clock. 2200 was hard failing consistently (0x0101 in cinebench) 1600 got me an error popup in cine first time i tried it and then a crash after a few runs (101..) 800 works seemingly flawlessly. Seems like IMC failing and giving 101 bluescreen perhaps

Didn't experiment for too long, and come to think of it my RAM was acting a tiny bit weird at 4.7ghz (2400 settings i swore were stable having major issues, which was why i was at 2200 on many of the same timings) gone back down to 4.7, will poke at a few things, and also trying RAM with a bit more RAM volts, +0.1+0.1 on sa/dio to see if RAM is stable and if i can be stable with a touch less vcore with the dio (considering i seem to need a whole lot just 100mhz up.. 5 runs in a row @+0.2, crashed both attempts @+0.1)

If there's sufficient evidence I must tweak Io voltages and SA seperately my head will explode lol, another 3 parameters to tweak that may or may not interact with the other voltages to bring out a different result!

   
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post #3746 of 19299
Dunno if they'd have to be done seperately, because i thought my RAM would be fine at stock (1600cas11) and it wasn't. 101 bluescreens that dissapear when clocking RAM to 800mhz = all of my wat
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post #3747 of 19299
Quote:
Originally Posted by Darkwizzie View Post

How many tests were done for this?

Took the whole day yesterday, in fact the night before as well to get this. Yesterday i ran xtu stress a good half dozen times till it looked good. Ran x43 before i hit the sack and it failed in two hours. Not too bad and expect a small increase in vring will sort it out. Keep forgetting though that you guys are on core and i'm uncore!

What was current O/C=<1hr
+.025vrin=5hr30
+.15v SA/IOD=<2hr
+.15v SA/IOD/IOA=10min+ (fastest BSOD of them all!)
+.25vrin, +.15v SA/IOD=9hr5min stable.
multi from x42 to x43=1hr30min

I've now bumped vrinrg .02v and stressing x43 again.

All BSOD's were 124's. Any unstable setting would 9 times out of 10 drop at least a core on XTU bench when graph is on 2 minute setting. For some reason if you change it to say 30mins or an hour it won't show any cores dropping.
Edited by Doug2507 - 10/12/13 at 1:09am
post #3748 of 19299
what is the max voltage for watercooling i7 4770k?
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post #3749 of 19299
Umm, what voltage are you talking about? Vcore? VCCIN? Vring?
post #3750 of 19299
Quote:
Originally Posted by jameyscott View Post

Umm, what voltage are you talking about? Vcore? VCCIN? Vring?

I meant all voltage .
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