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Haswell Overclocking Guide [With Statistics] - Page 918

post #9171 of 19602
Dialed voltages down on my 47 core 34 uncore. Best I could do was 1.9 input, 1.28 vcore (bumped it up to 1.3 afterward to be safe), 1.024v uncore. Hoping to use this as a 24/7 if she holds.

...Nevermind. Now I'm getting a 9c. Damn, and that one last a few hours till BSOD.
Edited by lombardsoup - 1/27/14 at 4:34pm
post #9172 of 19602
Why are the batch numbers in the spreadsheet missing the 4th digit? Digits 3 and 4 are the work week. Saying (e.g.) 331 Cost Rica means that it came anywhere from week 10 through week 19.

Just curious.
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post #9173 of 19602
Quote:
Originally Posted by lombardsoup View Post

Dialed voltages down on my 47 core 34 uncore. Best I could do was 1.9 input, 1.28 vcore (bumped it up to 1.3 afterward to be safe), 1.024v uncore. Hoping to use this as a 24/7 if she holds.

...Nevermind. Now I'm getting a 9c. Damn, and that one last a few hours till BSOD.

Try increasing the vrin by .001 till you get stability....
post #9174 of 19602
I don't remember my old i5 750 being this difficult! Haswell is a finicky eater, stop whining and eat your voltage tongue.gif
post #9175 of 19602
Quote:
Originally Posted by lombardsoup View Post

I don't remember my old i5 750 being this difficult! Haswell is a finicky eater, stop whining and eat your voltage tongue.gif

I personally like it. It kinda forces you to get to know what's what on your motherboard, in order to get a good OC going. The last CPU that I overclocked was an E8500. With that CPU, I followed a guide that pretty much told me what settings to use, and I got the CPU to 4.2ghz and was only limited by temps....Haswell has proved to be quite a bit more "fun" than that.... biggrin.gif
post #9176 of 19602
Quote:
Originally Posted by peakclimber View Post

I've back read a few 1000 posts and been following along on this thread. First thanks Darkwizzie for starting it especially the idea of keeping the data in one spreadsheet one can download.

One of the more interesting points I see emphasized here is the relation of Vccin with Vcore. While I read elsewhere the usual "keep Vccin +.4-.5 above Vcore", this thread suggests an even tighter sensitivity between the two. I took the data spreadsheet from the first post and decided to plot Vccin to CPU VID. While Vccin was only provided from some of the lines, I think there is enough to draw some conclusions.

From a linear relationship point of view, the data would suggest CPU VID + .6v is the sweet spot for Vccin.

Trying to apply a polynomial relationship, it might hint that even more is to be added above 1.325 Vcore, ramping even higher with larger Vcore. But I think the data above 1.4 Vcore is a bit questionable given the lack of data points.

Quote:
Originally Posted by Darkwizzie View Post

How do you calculate the poly and linear lines?

New hypothesis:
The extra amount of Vrin required for a higher Vcore value differs from CPU to CPU, just like how different CPUs require different amounts of Vcore for a multiplier.

I would like to tell you I remembered all my math classes from college ... but the honest truth is I just had Microsoft Excel plot the linear and Poly (6th order) trend lines for me based on the scatter plot of your data points.

I wouldn't question that hypothesis. Certainly the data points are doing some wild swings above 1.40. The data below 1.325 looks pretty good with both trend line approaches agreeing with each other.
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post #9177 of 19602
My cache is at 3.5 atm. is it worth raising? Im going to run these settings a couple days then try to tweak the ram. Should I try to squeeze more Mhz from ram or tighten timings?

it passes the XTU tests, cinebench and I was able to play through a few maps of BF4 without crash although bf4 did make me raise vcore 2 times before it worked a full game.

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post #9178 of 19602
So much for voltage reductions. Asswell you'll get your paddle just you wait
post #9179 of 19602
Quote:
Originally Posted by DarkReign32 View Post

I wouldn't say you're there just yet. Do you have any friends with the same socket that you can test on? You're better or narrowing everything down rather than setting up RMA's and possibly having to pay restocking fees.

I would say try another PSU but I have a feeling that HX is rather new. Plus if it shorted you probably wouldn't smelled something.

Good call on the PSU. Was checking out the one-eggs reviews and a lot of them mention not being able to POST or get into BIOS with this particular model. Hoping that's it. Thank you.
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post #9180 of 19602
I'm ready to have my OC settings charted.

Username: Peakclimber
CPU Model: 4770K
Core Multiplier: 45
CPU VID: 1.33v (manual)
Vcore: 1.344-1.360 (fluctuates between the two)
Uncore Multiplier: 45
Uncore Voltage: 1.30
Cooling Solution: Custom Loop (delidded)
Stability Test: 60min Aida64, 30m Aida64 (fpu only), 120min CPU:OCCT, 10x x264, 200% memtest (8 windows 2G each), 10x IBT (very high)
Batch Number: 313 Malay
Ram Speed: 2400 10-12-12-31-313-2T
Input Voltage: 1.92
LLC Setting: 8
Motherboard: Asus Maximus VI Extreme

Test pics:




And for those who love all the gory details, Here are pics of all my data/runs getting to the stable point. This include error codes (or symptom), temps, voltage settings / display values, etc. Each spreadsheet row is a separate setting I ran. On the left are settings with orange an increase of that value and blue a decrease (from last settings). On the right is test(s) run: red means failed or crashed, green means passed. You'll find my primary stability test was CPU:OCCT. If you look carefully at my data you'll see a case where I had x264 pass 50 times but crash ~40mins into a CPU:OCCT test. Net result there was a 10mv increase to Vring / Vsa and 40mv increase to Vccin. For those who like to associate error codes with what to change, my data gives what I experienced.

This first set was just me "screwing around" based on various stuff I read. Not really following any guide / strategy per say:


The second set I was following, more or less, what is recommended in this thread. You can see I found a fairly stable 44x, 45x, and 46x. But decided 46x was a bit higher Vcore than I want for 24/7 machine so decided to live with 45x for now.


Finally, this last set I was following the guide found here.
http://www.simforums.com/forums/haswell-48ghz-on-air-building-a-haswell-system_topic46180.html

This one netted my stable settings listed above.
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