i5 4690K OC

Dragos Manea · Jan 30, 2016

Hello,
I got a small question about OC-ing my i5.
My configuration can be seen in my sig.
So the question is my cpu is stable as fallows:
4.2 - 1,18v
4.3 - 1.2v
4.4 - 1.28v
4.5 - 1.35v
4.6 - 1.4v
My cooler is deepcool maelstrom 120 (120mm water cooling AIO)
at 1.4v the temperature is about 90-92 degrees celsius in prime95 so the cooler can handle it but it is really safe 1.4V?
If it were you in my place which one would you choose from this options?

JQB45 · Jan 30, 2016

Nevermind. I believe there is a sticky in the overclocking forum on max. safe voltages.

UPDATE:
www.tomshardware.com/forum/id-1808604/intel-temperature-guide.html

-> Core i

6th Generation 14 nanometer ... 1.35 Vcore
5th Generation 14 nanometer ... 1.35 Vcore
4th Generation 22 nanometer ... 1.30 Vcore
3rd Generation 22 nanometer ... 1.30 Vcore
2nd Generation 32 nanometer ... 1.35 Vcore
Previous Generation 32 nanometer ... 1.35 Vcore
Previous Generation 45 nanometer ... 1.40 Vcore

Dark Lord of Tech · Jan 30, 2016

4590K?

synphul · Jan 30, 2016

If it's the 4690k I'd want to keep it at 1.3v or less. It could be that this particular chip you're using isn't a great overclocker but you can also try checking your uncore multiplier. If having a hard time getting stable at higher overclocks, drop the uncore to x38 or x40 rather than 1:1 with the cpu multiplier.

Have you tried fine tuning your vcore for the other speeds? .08v to go from 4.3 to 4.4ghz seems a bit high. I would try going with a multiplier of 44 or 45 and slowly reduce the vcore say from 1.35 to 1.34, 1.33 etc testing in between to make sure it's stable. You might be able to get the vcore lower for either of those multipliers. Voltage creates heat so with the seemingly higher voltages for the corresponding multipliers it's not unusual to see some higher temps.

Dragos Manea · Feb 1, 2016

Sorry, my mistake, as i said my config is in my signature at there you can see it is 4690k.

@synphul, yes i tried for 4.4 anything under 1.28V is unstable, my uncore is not 1:1, it is at x38. Same thing for 4.5, anything under 1.345 becomes unstable (freezes, crashes, BSOD). It seems i have a bad overclocker. If you were me which of the possible combination would you choose?

EDIT: I manage with very fine tunning and lots of patients to achieve 4.7 at 1.457V xD but that is way too much and honestly i would like to use it more then 1-2 years xD. TDP in this case in AI Suit 3 is about 150-170W.

shaolin_thumbs · Feb 3, 2016

4.4 is looking like the magic number

shaolin_thumbs · Feb 3, 2016

You Could add a Peltier into your loop and get better overclocks BUT with the added voltage seriously shorten your CPU's lifespan,also peltiers are tricky.

SkyMembrane · Feb 3, 2016

Dragos Manea :

90-92 degrees in Prime95? No, your cooler cannot handle it man... I have my I5-4690k at 4.6Ghz on an H80i GT and on small FFTs, I've never seen it go over 71 degrees on the CPU temperature and 73 degrees on a core. I stopped OC'ing at this point because it was getting very close to Intel's recommended temperature limit.

4th Generation 22 nanometer: i5 4690K (TDP 88W / Idle 2W)
4th Generation 22 nanometer: i7 4770K / i5 4670K (TDP 84W / Idle 2W)

Tcase (CPU temp) = 72C
Tjunction (Core temp) = 77C
Tj Max (Throttle temp) = 100C

It's not recommended to run those CPUs at a higher voltage than 1.3, so if it doesn't run stable at anything higher than 4.4Ghz on 1.3 or less, I wouldn't go there.

Dragos Manea · Feb 4, 2016

SkyMembrane :

Right now i m renovating my apartment but until teh end of the year i plan to buy a nzxt h440 and a nzxt kraken x61. I do not plan to make my life that complicated with a peltier, it is too tricky and it does not worth, too expensive and too much trouble. Thank you for your responses it seems that i will stick at 4.4 where the temp is 74 C in prime small fft. In gaming mostly witcher 3, cryssi 3 and bf 4 the cpu doesnt go over 60 C, my cpu fan is set to go full speed at 64 C.

synphul · Feb 4, 2016

Temps aren't the only consideration, voltage is just as important. 1.457v vcore? Good way to kill a cpu, that's way too high. It can easily cause irreversible damage. Since 4.4ghz is about the highest you can go while staying under 1.3v that's where I'd leave it personally. You're still 500mhz over stock turbo and another 100-200mhz isn't going to mean much at that point.

Aka, 500mhz (4.4ghz) above stock turbo is around 13% more speed. An additional 200mhz over 4.4ghz is only 4.5% additional speed while pushing voltages too high. Given your current overclock results it would seem your specific cpu isn't a bad overclocker but not a great one either and wouldn't be worth a peltier anyway. It goes back to heat not being your enemy, your cpu is hitting a vcore brick wall at this point. You can't just crank it up to 1.5v, throw ln2 on it and call it a day, at 40c under load the voltage is still too high in that scenario.

If you're just out to set an oc record then toss ln2 on it, crank up the vcore until it blows but plan on getting a new cpu. Not really worth the risk unless you have the extra cash and enjoy getting record oc scores (some people do).

Dragos Manea · Feb 4, 2016

synphul :

Well, tried that just for curiosity to see no matter of voltage how much it can go, i hit the wall at 4.7 with 1.457V with all asus digi-vrm control from on demand to full load (extreme). It does not go more then this, it is unstable at 4.8 giving me crashes and BSODs no matter how much i increase the voltage.

EDIT: now i will try to tinker a bit more to see if i can hit 4.5 to a maximum of 1.3V but with all my patience and from microstep to microstep i could not achieve 4.5 under 1.3 last time. So i will try one more time but i think i cannot achieve that.

shaolin_thumbs · Feb 4, 2016

Dragos Manea :

SkyMembrane :

Right now i m renovating my apartment but until teh end of the year i plan to buy a nzxt h440 and a nzxt kraken x61. I do not plan to make my life that complicated with a peltier, it is too tricky and it does not worth, too expensive and too much trouble. Thank you for your responses it seems that i will stick at 4.4 where the temp is 74 C in prime small fft. In gaming mostly witcher 3, cryssi 3 and bf 4 the cpu doesnt go over 60 C, my cpu fan is set to go full speed at 64 C.

just fyi tec's arent bad if you keep it outside your case and add it to your water loop

all you need is one peltier ,a laptop charger ,a cheap ass water block ,an old cpu fan and a raspberry pi temp controller (probably £50 all in at the most)

Dragos Manea · Feb 5, 2016

In my country only the laptop charger is 50 euros (Romania) so everyhting will be significantly more expensive here.

shaolin_thumbs · Feb 5, 2016

Oh that's too bad man mine cost me about $10 (uk equivalent of)
One last thought try and get your airflow through your case running top to bottom,you should notice better temperatures.exhausting out of the top of your case

SkyMembrane · Feb 5, 2016

shaolin_thumbs :

It's physically easier to move hot air up and cold air down, so he should have the exhaust at the top for the maximum efficiency at exhausting hot air, at least that's what my knowledge of physics tells me...

shaolin_thumbs · Feb 5, 2016

SkyMembrane :

shaolin_thumbs :

It's physically easier to move hot air up and cold air down, so he should have the exhaust at the top for the maximum efficiency at exhausting hot air, at least that's what my knowledge of physics tells me...

Dragos Manea · Feb 8, 2016

SkyMembrane :

Well my current case has different airflow (NZXT H230 thats why i m planing to buy an h440 by the end of the year but same rule apply it is extremely priced in my country on newegg is 110 USD while here is almost 200 euros.

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