4670k safe overclock for 24/7 use

In that case I'm going to leave it at 4.7Ghz @ under 1.35v for daily use. Idle cpu temps are in the low 30s, and at load they are in the 50s/60s. Its only Prime95 that sends temps up to hit 80C after around 5-10 mins.
 
If you can game and do what you like without issue at 4.7 ghz and them volts. Fair play. I always side on caution but previously I clocked the jellybeans out of my other gear without any issue.
 
Yes seem you have an awesome chip so if that was my cpu I would delid it. My i7 4770k at bench at 4.8ghz since I delided it last week end and temps under 80c best thing iv done.

So get it in a vice give it a tap :)
 
De-lidding is a step too far for me, way too risky!!

4.8ghz @ 1.35v = pc freezing after 2 minutes of prime.
4.7ghz @ 1.33v = fine.

I don't want to risk any higher then 1.35v so I'm leaving it at 4.7ghz. Will test thoroughly for a week and see how it goes, thanks guys.
 
e36Adz said:
De-lidding is a step too far for me, way too risky!!

4.8ghz @ 1.35v = pc freezing after 2 minutes of prime.
4.7ghz @ 1.33v = fine.

I don't want to risk any higher then 1.35v so I'm leaving it at 4.7ghz. Will test thoroughly for a week and see how it goes, thanks guys.
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I have delidded my i7 4770k last week end and I used liquid metal pro on the cpu die with mx-4 on ihs with a h100i. I have since had my volts up to 1.43v @4.8ghz testing and temps never gone over 80c :)
 
I was wondering if you guys have any idea on the relationship between voltage/temperature and chip lifespan?

I run at 4.0GHz with stock voltage atm, partly because I think my chip isn't great (most I could achieve, seemingly regardless of voltage, was 4.4GHz) but also because I am worried about the effects of the additional voltage. Same story with my GPUs - I am very conservative as I don't feel that I understand the risks well enough.

Basically, providing temperatures are fine (for argument's sake, below 70 degrees when stress-tested) does the voltage even matter? Or is high voltage dangerous regardless of temperature?

I guess to put it another way, which chip would die first - one running 24/7 at 75 degrees and 1.2v or one running 24/7 at 65 degrees and 1.3v?

Finally, how are you guys measuring the impact of the OC? I ran my system at 4.4GHz for a bit (requiring 1.3v) but I can't really tell the difference between that and the 4.0GHz setting I've used since! With GPUs it's much easier to get some objective measurements it seems!
 
Most stressful thing my main rig undergoes is a Handbrake HD encode. With this warm patch of weather mine will hit 72 on a prolonged run @1.245v (4.5ghz) I'll likely never see and negative effects if I kept the chip 5 Years. Anything is a risk but you have to go see for yourself .
 
AdrianIscariot said:
I was wondering if you guys have any idea on the relationship between voltage/temperature and chip lifespan?
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It would be nice to hear from anyone who has actually managed to kill a haswell cpu. Although we keep hearing that volts/temps will affect a cpu's lifespan, I don't recall EVER reading that someone managed to kill an intel cpu from a 24/7 stable overclock especially if it's kept within the recommended voltage.

AdrianIscariot said:
I run at 4.0GHz with stock voltage atm, partly because I think my chip isn't great (most I could achieve, seemingly regardless of voltage, was 4.4GHz) but also because I am worried about the effects of the additional voltage. Same story with my GPUs - I am very conservative as I don't feel that I understand the risks well enough.

Basically, providing temperatures are fine (for argument's sake, below 70 degrees when stress-tested) does the voltage even matter? Or is high voltage dangerous regardless of temperature?

I guess to put it another way, which chip would die first - one running 24/7 at 75 degrees and 1.2v or one running 24/7 at 65 degrees and 1.3v?
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I would say on your last point the difference is negligible. Let's say a cpu is designed to run at up to ~90C and take up to ~1.5v, I personally would try and keep it below 80C and 1.4v at all times.

AdrianIscariot said:
Finally, how are you guys measuring the impact of the OC? I ran my system at 4.4GHz for a bit (requiring 1.3v) but I can't really tell the difference between that and the 4.0GHz setting I've used since! With GPUs it's much easier to get some objective measurements it seems!
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A 32M run of SuperPI? In real term usage (depending I suppose what you use your pc for) it would be very difficult to tell the difference between a cpu clocked at 4.0ghz or 4.4ghz, there may be a 1fps gain in some games? :p
 
Just done a quick google, I found a thread where someone killed a haswell 4770k @ 1.5v, so stay below 1.4v!! :D
 
I've certainly not heard of Haswell deaths. The usual story of hotter than ivy due to the thermal material used blar blar. I run mine at 4.5 as it was virtually the first thing I set it to when I got it. Everything seems fine and acceptable to me and no issues have arisen in 11 months use. The "k" chip just does roughly exactly what I expected. Can't grumble except for the higher than previous temps I've ran my chips when totally stressed out. My i5 laptop runs considerably hotter and yes that can shut itself down if run a heavy encode on it (did one because I was too lazy to turn main rig on). Thermals and volts vary so much you just gotta be sensible.
 
Thanks for the information. I guess as Haswell is still (relatively) new maybe it's too soon to see how extra voltage and/or heat effect the lifetime of a chip. I'm not even sure how long they are designed to last for in the first place!

As this is my first build and I want it to last 3 years or so I'm trying to figure out what to do. On one hand I've got a K-series chip and a decent cooler, so want to tweak it and find a little extra performance. On the other, I don't want to have the chip fail within say 3 years, especially if the gains from overclocking aren't noticeable! I use the PC for work (basic office stuff), study (more office stuff and some light cryengine / unity work) and gaming.

Maybe I'll have a play with it again this evening and see what voltage I need for 4.2GHz. Something of a compromise!
 
At 'auto' volts my 4670k was getting ~1.3v according to cpu-z and I could run comfortably at 4.5Ghz. I'm by no means an expert but I'm certain there is next to no chance of causing any damage to the cpu at around 1.3v unless ofcourse you are getting temps well over 80C. If you have good airflow in your case and a decent cooler, go for 4.5Ghz :)
 
After some testing, I've settled in the end at 4.7Ghz for 24/7 use @ 1.32v

Idle temps 27C - 33C
Load temps 50C - 60C
Prime95 temps 77C - 83C

Speedstep enabled & Adaptive mode so 99% of the time, the cpu is downclocked and receiving ~0.7v

I think I could get 4.8Ghz out of this cpu, but I'd have to go to around ~1.4v which isn't worth it. Very pleased overall with this oem chip, picked it up second hand from someone who hadn't overclocked it for a measly £110 :)

Now to look for a second Ti...
 
AdrianIscariot said:
Thanks for the information. I guess as Haswell is still (relatively) new maybe it's too soon to see how extra voltage and/or heat effect the lifetime of a chip. I'm not even sure how long they are designed to last for in the first place!

As this is my first build and I want it to last 3 years or so I'm trying to figure out what to do. On one hand I've got a K-series chip and a decent cooler, so want to tweak it and find a little extra performance. On the other, I don't want to have the chip fail within say 3 years, especially if the gains from overclocking aren't noticeable! I use the PC for work (basic office stuff), study (more office stuff and some light cryengine / unity work) and gaming.

Maybe I'll have a play with it again this evening and see what voltage I need for 4.2GHz. Something of a compromise!
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I think a sensible 4.2ghz aim is a good fair one. ;) As you said 4.4 needed 1.3v , I would say try 1.25-1.28v :p

anything under 1.3v on Haswell chips is stock voltage. As mentioned most cpu would consume 1.3-something using boards stock power options. My current 4670K used 1.33v on stock for 3.4 - 3.8ghz turbo :eek:
I am currently 1.301v but at 4.6ghz :D temps are in check and have good ventilation.
Going over 1.3v is a grey area. Its basically what your comfortable with. I dont honestly believe you would cause serious issues to these chips at anything under 1.4v but its a risk.

Go back to the Q6600 , and the i7 920 processors. How many still around ? lots, with many folk having huge overclocks on those processors for all these years. I personally bought a i7 920 , ran it at 4.2ghz 1.34v since 2008 solid 24/7 - my dad now owns it , back at stock and its running perfectly as ever.

So as long as we keep some sort of sensible guide, im sure things will not get ugly. And to be honest none of us here ever keep a system longer than 2 years anyway ......... lmfao :D

e36Adz said:
After some testing, I've settled in the end at 4.7Ghz for 24/7 use @ 1.32v

Idle temps 27C - 33C
Load temps 50C - 60C
Prime95 temps 77C - 83C

Speedstep enabled & Adaptive mode so 99% of the time, the cpu is downclocked and receiving ~0.7v

I think I could get 4.8Ghz out of this cpu, but I'd have to go to around ~1.4v which isn't worth it. Very pleased overall with this oem chip, picked it up second hand from someone who hadn't overclocked it for a measly £110 :)

Now to look for a second Ti...
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Hey e36Adz ;)

Man you do seem to have a decent 4670K there. Were pretty much on par , but im 4.6 / 1.3 ,,,, just got 4.7 booting but was trying 1.37v ........ bit too much for my liking though.
I have had Q6600,Q9550,I7 920,I7 2600 and by far the most impressive is this little 4670K. Love this CPU :p

Well done , keep up the good work.
 
I thought I was the only one with temp problems. Although I have not gone over 1.2v yet I was quite scared of the temps i got when I run prime. Soaring to 89 @ 4.2ghz with 1.18v.
 
luckyguy20 said:
I thought I was the only one with temp problems. Although I have not gone over 1.2v yet I was quite scared of the temps i got when I run prime. Soaring to 89 @ 4.2ghz with 1.18v.
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That sounds awfully high at such low volts, what cooler are you using? Have you tried re-seating it? Decent airflow in case?
 
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