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Haswell Overclocking Guide [With Statistics] - Page 1107

post #11061 of 19539
Quote:
Originally Posted by angelotti View Post

No one can tell you that, you’ll have to test. But if you have a cheap motherboard, you might want to try 1.9 to 1.95 vccin.
Yes I know that I must try to actually know how much. I though maybe someone who has overclocked enough haswells to understand their usual behavior, could throw an interval of voltages that will be required to stabilize it. Anyhow my Mobo is the Maximus IV Hero, I kept the vccin the same that was used for 1.265 vid. I just played with multi and vid for this experiment.(I just follow the 0.6v above vid rule for vccin tbh w/o troubleshooting this parameter for error).
post #11062 of 19539
Hi,

i found out that my OC at 42core/42uncore with 1.22 VID, ram at 2400 and 1.8vccin wasn't stable after 2 months...
So i went back and tried 41, and crashed in IBT.
Tried with ram at 1600, uncore 39, vccin 1.9, couldnt get anything stable at 42 or more

I then tried to put everything back to stock, and found that my vcore goes up to 1.265 during IBT !! STOCK voltage !

Is it the sign of a terrible chip?


Also, LLC doesn't seem to work, at lvl 1 or lvl 8 it gives the same vcore ?


What I tried:

x41 core x35 uncore
ram 1600
Vcore adaptive -0.2 (1.245 on load)
VCCIN 1.90
RAM v1.65

and got a bsod on boot oO

tried with voltage at manual 1.3v and with same settings at 44 core and can't even do one xtu bench

I am really lost here... IBT and xtu bench really killed my OC.... so back to stock for now :/
Edited by Gugus03 - 3/14/14 at 5:09pm
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post #11063 of 19539
Quote:
Originally Posted by JackNaylorPE View Post

I was specifically directed by the card manufacturer to use Furmark when I called to specifically to ask about OCCTs throttling. I called and ask if there was something wrong with my card cause it wouldn't go over 28% load on OCCT. Their answer .... "Use Furmark, better to test and watch temps while you are sitting there paying attention, then to have it spike up when you are distracted by a game or something else. I got the same answer from my laptop vendor (custom built Clevo design).

They did add that the reason that nVidia throttled OCCT was its ability to run both CPU and GPU tests concurrently and that this can oft result in low voltages on 12v rails which, with a less than stellar PSU, can damage the PSU & and everything else.

As for BF4, I couldn't get it 3 hour stable at stock CPU and GPU speeds.....at least not in SLI. It's the only game that exhibits this behavior....tho my son played last night (all stock) with the new 335.23 drivers and didn't crash for the 1st time ever. We;'ll see what happens when we turn on the profile used on all other games (+25% GPU / +20% Mem) over the weekend.

I'd still be careful with Furmark and OC Scanner. There have been plenty of times when company reps have steered people in the wrong direction, and there are threads where Furmark has killed 780s.
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post #11064 of 19539
Quote:
Originally Posted by coelacanth View Post

Quote:
Originally Posted by kangk81 View Post

I don't know how you guys go about finding the vcore but here's what I did.

After finally settling down at 1.9vcore, 1.4vcc I let it run XTU for at least 8hrs which passed without crashing then I let it run F@H for 12hrs while I went to work.

It crashed the 1st time, I added 0.02V to vcore and ran F@H overnight. The next morning it was still running I left it and went to work, came back, still running.basically I would just run F@H till it crash until I got to 1.912vcore which has been running for 3 days without crashing.

I'm using F@H cos it the real world CPU intensive application I'm using.

Sent from my LG-P875 using Tapatalk

It sounds like you're running 1.92v VCCIN (Eventual Input Voltage) and 1.4v VID. If your 1.4v is VID that's pretty high. What core multiplier are you using?

45x on core. Auto on ring

Sent from my LG-P875 using Tapatalk
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post #11065 of 19539
I can't for the life of me get x45. I can get x44 at 1.250 vcore and 1.2 Cache stable, but I've gone up to 1.3 vcore and It still crashes. Do i need even more? Ive got a NH-u14s.
post #11066 of 19539
Quote:
Originally Posted by BenJaminJr View Post

I can't for the life of me get x45. I can get x44 at 1.250 vcore and 1.2 Cache stable, but I've gone up to 1.3 vcore and It still crashes. Do i need even more? Ive got a NH-u14s.

Try 1.30,1.305, 1.31, and so on.
What codes are you getting during crashes, 124?
post #11067 of 19539
Quote:
Originally Posted by mistercoffee1 View Post

Try 1.30,1.305, 1.31, and so on.
What codes are you getting during crashes, 124?

1.275 = crash once prime 95 started
1.285 = Whea_uncorrectable after about 5 min
1.3 = Machine_check_exception around 7 - 10 minutes

I can try higher i guess
post #11068 of 19539
What are you doing with VRIN? Yes you can can need more than +0.05 for same level of stability with +100mhz
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post #11069 of 19539
Hello OCN. Got my hands on second Intel CPU (last one was Intel Pentium 166 MMX biggrin.gif).
Also It's my first try to overclock it.
Nothing special, just bumped core multiplier and core voltage a bit.
CPU: 4770K
MoBo: Sabertooth Z87
RAM: Corsair Vengeance LP 1600 C9 4 GB 9 (just for now, will get another set of ram tomorrow)
PSU: Chieftec BPS-950C
CPU cooling: air cooler Zalman CNPS10X Flex with 2 Gentle Typhoon AP-18 (push-pull)

CPU clock: 4600 MHz
Core Multiplier: x46
Core Voltage: 1.2V

For now it seem stable after a bit more than hour of AIDA64 stress test and few hours of BF3, BF4 each.
Max core temp ~81C.
The only thing i worry about - clock dips on AIDA's Graph,
Here is a screenshot

Is it OK?
Edited by Frontside - 3/15/14 at 6:15pm
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post #11070 of 19539
Quote:
Originally Posted by Cyro999 View Post

What are you doing with VRIN? Yes you can can need more than +0.05 for same level of stability with +100mhz

its at 1.9, havent touched it
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