My first overclock, but is it too much??

[Zairs]

Ive just had a go at over-clocking my i5 760. Ive got a stable over-clock at 4.213mhz would it be ok to use this all the time, temps are not getting any higher than 77c

core voltage is 1.352v

*not stable, will have to try something else

 

[wazza300]

looks fine to me,voltage and temps are ok

 

[Zairs]

upped the voltage to 1.360v
temps hit 81c
but it did pass burn test
would this be ok for a longterm overclock?

 

[wazza300]

yeah,anything under 1.4v is safe imo and 80c

you could try switching to a cpu offset voltage so that it downclocks at idle in speed/volts

maybe try +0.0750v offset might need more,but only add small amounts and be sure the first two digits are 0,so +0.0

then look to see what load cpu v is in cpu-z while stressing and adjust the offset to suit,enable all powersaving apart from c1e,disable that as it usually causes mb while or squeal just set balanced power profile in windows7/8 power saving options

cpu will use less than 1v at idle and full voltage if stressed

 

[Zairs]

do you think i can push it any more or leave it that speed???

 

[wazza300]

4.2ghz is good,you could probably go more but personally I wouldn't run above 1.4v 24/7

 

[pastymuncher]

To be honest the difference between 4Ghz and 4.2Ghz is not going to be noticeable. I had a i5 760 in a P7P55D-E Pro and it's max clock was also 4.2Ghz but with 1.375v. The thing was, i could run at 4Ghz (20x200) with only 1.2875v and have it cooler running so that's what i ran it at the 2 years i had that build.

 

[Zairs]

To be honest the difference between 4Ghz and 4.2Ghz is not going to be noticeable. I had a i5 760 in a P7P55D-E Pro and it's max clock was also 4.2Ghz but with 1.375v. The thing was, i could run at 4Ghz (20x200) with only 1.2875v and have it cooler running so that's what i ran it at the 2 years i had that build.

im using your settings

 

[Zairs]

4.33mhz.
gonna see if its stable

 

[Zairs]

Not sure on a few settings
I get that bclk is the base clock and x20 is the multiplier and i can get a stable clock at 200x21=4.213mhz
but if i try 191x22=4.208mhg it fails
i put the v core voltage up to 1.8v so that not an issue.
Is it increasing some part of the ram setting too??

 

[Zairs]

kept it at 4.213mhz, but mangaed to drop the volts down to 1.34

 

[pastymuncher]

Drop that vcore, 1.8v will fry the cpu. You shouldn't be going above 1.4v. Mine didn't like any multiplier over 21 either and i really couldn't be bothered messing around with a higher bclk which is why my max clock was 4.2ghz. As you change the bclk you are also changing the ram speed. Bclk is similar to the fsb on 775 boards. Increase one and you increase the other. If you are playing with the bclk drop your memory speed/multiplier to stop it interfering with the overclock. Find the best bclk and then adjust the memory when everything is stable.

 

[Zairs]

Drop that vcore, 1.8v will fry the cpu. You shouldn't be going above 1.4v. Mine didn't like any multiplier over 21 either and i really couldn't be bothered messing around with a higher bclk which is why my max clock was 4.2ghz. As you change the bclk you are also changing the ram speed. Bclk is similar to the fsb on 775 boards. Increase one and you increase the other. If you are playing with the bclk drop your memory speed/multiplier to stop it interfering with the overclock. Find the best bclk and then adjust the memory when everything is stable.

sorry meant 1.38 lol

Gonna leave it at 4.2, spent enough time on it to end up where i started, now it over clock my 480

 

[esie999]

ive gotten to 4.3 stable on my chip using 1.3v, its running really cool when stress testing with aida64, 60c under load, but im not sure if this temp is accurate, anyone know if the corsair link software that comes with the h100i is spot on? and whats the highest volts you would consider putting through it using this cooler?

 

[pastymuncher]

Still only 1.4v. It doesn't matter how cold it is, the voltage could still kill it. A overclock to 4.3Ghz with only 1.3v is fantastic. Use core temp/real temp to verify cpu temps.

 

[esie999]

always though it was the heat that killed the chips, not the volts

 

[pastymuncher]

Volts will degrade a cpu over time or if too much is applied will simply fry the cpu. Heat is also a problem but just because a cpu is run at even sub zero temps does not mean you can throw high volatges at it.

When the socket 775 45nm "wolfdale" cpu's were launched i bought a E8500 as soon as it came out. Used to throwing anything up to 1.6v at the previous cpu's i gave it 1.5v trying to hit the elusive 4.5ghz. It degraded it even though my temps were really low. The overclock became less and less while needing more and more voltage for lower clocks. In the end it wouldn't even run at stock clocks without having to add more voltage. I was not the only one to have this problem. There were tales of it happening all over the internet and some cpu's just died. It never did hit 4.5Ghz.

I bought another one when they released the next stepping and that easily hit 4.5ghz but was on the edge voltage wise at 1.4v. It did run for a further year without anything bad happening to it but i upgraded to a Q9550 and sold it on.

 

[abbotsmike]

I suspect the issues with even low temps and high voltages, is just that the heat cant get out fast enough. The transistors in the die will have microscopic hotspots on them, and higher voltage is more likely to arc and degrade the junctions.
This is mostly thought about from an electronics perspective. I had an issue at work that involved transistors rated to 1600V and 50A, and were massively over cooled, yet peak voltages still damaged them over time. (They were peak voltages over the rated, but the point still applies!)

On a seperate note, my first overclock was taking my i5-2500k to 3.8ghz on the stock cooler, my second overclock was a year later when I bought a better cooler, taking the same i5 to 4.5ghz! It's been happy there for a year now, and I've had it for two. Voltage currently offset, coretemp reporting 1.24-1.35 at full speed.