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Haswell Overclock Thread

PCZ said:
There is no magic formula.
HW just doesn't overclock well.

You will have to keep buying chips till you get one that is an OK clocker.
Even then when you have a 'good one' it will not run heavy loads for long periods.

It is frustrating as I see great gains in number crunching power over IVY but I cant use it.
Clock for clock I am seeing gains of 35-40% over IVY running AVX code.
However I have to run very modest clocks in comparison to IVY/Sandy.

When pushed with AVX code HW blue screens with insufficient voltage or shuts down when you up the vcore to keep it stable.
This issue with AVX code is known about and some attempts have been made to fix it.

ASUS boards set on adaptive increase the core voltage massively when AVX code is run to try to stop the crashing but in reality all it does is make the VR's panic and shut the chip down.

In a nutshell Haswell is not suitable for heavy loads when Overclocked.

I take it you don't subscribe to the. just run normal stuff and never test for stability school.
I guess not, or you would just post AIDA screenies at 4.8 :)
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erm, mine is stable at 4.8 no worries. avx or not. just set manual volts when using aida or whatever to test.
 
Yep, I'm now stable @ 4.6Ghz 1.2V, temps in mid to high 70's Aida 64, OCCT, many hours of Crysis 3 and that's without delidding, Haswell is an awesome cpu when you get a good one.
 
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Very impressed with Haswell here aswell, 4.8 stable with little effort, pretty sure I'll have 5 ghz + once I've removed the lid, as already said if you get a good one they clock just as well as sandybridge/Ivybridge.
 
I have been waiting on my refurbished h100 before I started my overclocking as I didn't want to try with the stock cooler.
I have just popped in a quick overclock with vcore up and clock multipler up ive got [email protected] running stability tests atm but so far all is going well at 62.c max 32.c idle atm

I tried [email protected] but got a blue screen in windows 2 seconds in when i tried to run anything so it looks like I cant go there still it seems to me this chips is above average so far is that right?
 
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Vasya said:
I have been waiting on my refurbished h100 before I started my overclocking as I didn't want to try with the stock cooler.
I have just popped in a quick overclock with vcore up and clock multipler up ive got [email protected] running stability tests atm but so far all is going well at 62.c max 32.c idle atm

I tried [email protected] but got a blue screen in windows 2 seconds in when i tried to run anything so it looks like I cant go there still it seems to me this chips is above average so far is that right?
Click to expand...

yep. not too bad, it sounds about the same as mine.
 
excellent news thanks, I will read up on some guides for overclocking the haswell and see if i can tune the performance a bit more at 4.7Ghz ive only touched multipler and vcore so far but I doubt I will get 4.8, still good news cheers guys - oh got any links to good overclock guides arround? I am running the MSI Z87-G45 mobo
 
Should hopefully have mine up and running this weekend, (4770k with asus maximus VI formula). Bought the chip on members market, previous owner tested it briefly at 4.6ghz on 1.25v, temps touching 80c under a prolimatech megahelims with dual low speed fans. Cooler ill be using is an alpenfohn k2 with dual high speed/cfm akasa piranhas. May look into delidding it depending on temps in my own setup.
 
What is the safe voltage maximum for haswell, I have read that an Asus rep said no higher than 1.275v for normal use (mine hits 62c full load here), but as heat isn't yet an issue I am wondering if its worth trying to push higher with more than 1.300v I,ve seen some mention of 1.500v working but that seems like it would be well into the danger zone for degrading the cpu's lifespan, something I don't really want to do.
 
1.4 is a safe maximum, 1.5 is easily in the dangerous zone if you're only on aircooling. I probably wouldn't push past 1.4 unless temps are fine and even then 1.45 is probably as far as you want on air.
 
You'll probably hit unsafe temperatures (at load, of course) before you hit an unsafe voltage. I wouldn't want to go over about 1.35V or so, but that's because of the temperatures really.
 
ok thanks that gives me a bit more head room to play arround with cheers guys

edit:
well I tried out [email protected] and managed to get into windows take a look at temps etc and start a prime test halfway through though I hit a bluescreen.
I am now testing [email protected] which is currently stable enough to try some tests out no errors yet but its early days yet, I've got 79.C at load and upto 40.c idle atm with the h100 on quite mode.
the voltage is a bit worrying though I may try and dial it back a notch and try for a stable 4.6 or 4.7 for normal use, ive not touched my memory speed at 4.8 yet but at 4.6 I had my XMP working at full speed 2400Mhz, I'll update my results later but ive got some stuff I need to work on today, cheers.

 
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setter said:
Should hopefully have mine up and running this weekend, (4770k with asus maximus VI formula). Bought the chip on members market, previous owner tested it briefly at 4.6ghz on 1.25v, temps touching 80c under a prolimatech megahelims with dual low speed fans. Cooler ill be using is an alpenfohn k2 with dual high speed/cfm akasa piranhas. May look into delidding it depending on temps in my own setup.
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Nice m8, its a cracking bit of kit but get some more pennies together --> H2o Custom Loop is the way to go bud.

As we seem to be getting Hot Hot hotter spells every year now and will keep the Hades sorry Haswell under control. lol :cool:
 
OLDPHART said:
Nice m8, its a cracking bit of kit but get some more pennies together --> H2o Custom Loop is the way to go bud.

As we seem to be getting Hot Hot hotter spells every year now and will keep the Hades sorry Haswell under control. lol :cool:
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Lol, hades.:D Tbf, my ib is a pretty hot runner in stress testing, but in games it naxes at 65c on one core.

Custom loop would be nice, but after this latest upgrade ill be skint a bit. Have you decided to go with the 4770k and the asus formula mate?
 
PCZ said:
X79 isn't finished yet
IB-E launches shortly and with the benefit of hindsight the money I spent on HW would have been better spent on a 4930K.
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http://forums.anandtech.com/showthread.php?p=33731787 post 134


I think im going to take that advice and wait until the 4th of september.The only thing i was hyped about was you saying a 35% increase over Ivy with AVX.I havent looked into the past but do all avx additions really fail to have such large boosts outside useless programs?


You would hate to be on Ivy-E and see AVX2 change things by even 30%.And if you say they struggle with high AVX loads and IVY-E has better TIM im going IVY i think as if Haswell has to downlock for big AVX loads IVY-E can power through them with two extra cores and more cache.IVY can be stubborn with high loads ive made mine wince in pain at 95c and still its not flinced from its clock speed.If this thing had two extra cores and solder TIM then wow it would hammer Haswell.


Do you agree this is wise sir? ;)
 
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Started to dabble in a bit of clocking on the setup in sig, though having a few issues. Set vcore and cache volts to 1.2500, bclk 100, 45x multi. Ram at 1600mhz, 9-9-9-24 1.5v Upon saving and exiting bios it gets to the windows logo screen before bsod'ing with error 0x124. Havent touched any other voltages.
 
setter said:
Started to dabble in a bit of clocking on the setup in sig, though having a few issues. Set vcore and cache volts to 1.2500, bclk 100, 45x multi. Ram at 1600mhz, 9-9-9-24 1.5v Upon saving and exiting bios it gets to the windows logo screen before bsod'ing with error 0x124. Havent touched any other voltages.
Click to expand...

Needs more vcore I reckon - try 1.3
 
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