4690K Overclocking to 4.2

[HKILLER]

I bought a 4690K a few weeks ago and i decided to OC it yesterday and see if it can OC with low voltages.i have a gigabyte board and so i went to BIOS and put the voltage on auto and overclocked notch by notch,each time adding 0.1 ghz till i got from 3.5-3.9ghz to 3.7ghz-4.1ghz 1.056v during the torture test Temp : 68-70cc.(i stress tested the results with LinX and Prime 95 and it was stable ) But when i overclocked to 3.8-4.2ghz the temp suddenly went up to 95cc!!i checked the voltage and saw it was 1.256v during the test which surprised me.so i quickly stopped the stress test and set everything back to default...is this really the limit of my CPU or should i give it a manual Voltage like 1.125v and test again?(the default in BIOS is 1.1v) i feel the jump from 1.056v to 1.256v for just 0.1ghz is too much.will it damage my CPU or board if the voltage is not enough for the CPU? or it will just restart and BSOD?

 

[azathoth]

Manual voltage, not automatic.

 

[jediTT]

Dumb question I'm sure but you're using an aftermarket cooler and not the stock one right?

 

[babernet_1]

Yes, all processors have a "wall" where you need to add a lot of voltage to get a little more speed. Just make sure you have a nice aftermarket CPU cooler.

 

[drtoast]

aye, manual voltage, also dont touch offset voltages till you found the manual limit, cos prime can draw extra and overvolt your cpu.

 

[jediTT]

http://www.anandtech.com/show/8227/devils-canyon-review-intel-core-i7-4790k-and-i5-4690k/2

My 4690k is at 4.6ghz/1.275v, temps around 60c-65c during heavy gaming.

 

[HKILLER]

Yes i have a 240mml AIO water cooler installed...i didn't even get the stock cooler out of its pack...so what voltage do you guys suggest?it reached 4.1 with 1.056v so i think 1.075v-1.1v would do for 4.2 or 4.3?also I'm pretty sure my temps are gonna be lower while gaming compared to stress tests of LinX and Prime 95...i just hope under volting my CPU would not damage anything.thanks for the voltage offset tip i will probably not touch that.

 

[drtoast]

i got 4.6 @ 1.225, my temps hit 73 under prime with a hyper 212 evo air cooler. 4.8 needed 1.314 and hit 83 on air... you shouldnt see 95 on water ever.

If you hit 95, i would

a) check your paste install (reapply) and then check your cooler for bubbles.
b) check you arent using prime v28 or w/e, any version past 26.6 is bad news bears for haswell. the avx instructions are badly coded for haswell on the later versions, causing massively overheated temps like that to display.

 

[jediTT]

Usa AIDA64 instead of prime

 

[HKILLER]

i got 4.6 @ 1.225, my temps hit 73 under prime with a hyper 212 evo air cooler. 4.8 needed 1.314 and hit 83 on air... you shouldnt see 95 on water ever.

If you hit 95, i would

a) check your paste install (reapply) and then check your cooler for bubbles.
b) check you arent using prime v28 or w/e, any version past 26.6 is bad news bears for haswell. the avx instructions are badly coded for haswell on the later versions, causing massively overheated temps like that to display.

well that's a 1st! all the Guides say "Use the Latest Version"...and yes i have v28.4 Build 1...does this also go with the LinX aswell?
I have just recently changed the thermal paste(Arctic Silver 5) and then stress tested the CPU with Prime 95 (the same version) on stuck clocks and i hit 65cc...if the temps are about 5 cc higher than what they should be it's kinda normal cuz my room is around 30-31 all the time(compared to the 24cc on all the water cooler reviews)...

 

[drtoast]

maybe they patched it lately, but it did suck last month. mine hit 93 stock using the v28, down to 48 stock on v26.6, give it a shot out of curiosity

 

[HKILLER]

maybe they patched it lately, but it did suck last month. mine hit 93 stock using the v28, down to 48 stock on v26.6, give it a shot out of curiosity

ok i will get that and try this 1st.then if it worked out i will be doing the overclocking process from zero this time manual voltage...

 

[HKILLER]

I finally found some time off and I tried to overclock CPU. I tried Prime95 v26.6 compared to v28.4 and the difference is just massive! While on stock clocks i hit 62cc with v28.4, now i am at 52-53cc(room temp 27cc) with v26.6!!! That is a 10cc difference! Next step i manually added voltage 1.1V with 4.2 GHz. I did that and it’s hitting 60cc in prime95 absolutely great! (Also LinX is on the same page as Prime95 v28.4 because even after my manual voltage it would hit 80cc for no good reason…)now I’m just gonna OC and see where it goes!...pretty much my problem is solved so thank you guys!

Update: I hit 4.6 GHz with 1.154v prime 95 temp: 72cc and AIDA 64: 64-65cc which is kinda weird since I expected AIDA 64 temps be higher…I won’t be pushing it further cuz I think it is a good sample…but one question: in CPUID HWMonitor under the motherboard bar the CPU Vcore is 1.164v but under the CPU bar the voltage is 1.154v (which is the amount I had manually set in the BIOS) CPUz also shows the 1.154v.so am I overclocking on 1.154v or 1.164v??

 

[drtoast]

personally i find IXTU to be more reliable for voltage reads, can you give that a shot? It should answer your question.

 

[drtoast]

excellent result though... close to gold id say, mines above the 75% grade on OC silicon... and you got 4.6 for a whole 0.1v less.... that chip could probably hit 5 on air with uncomfortable temps 😛

Id have to go water for that if it stood it at all.

 

[HKILLER]

well i did check and apparently the 1.154v is right....i wonder how much further i can push it maybe to 5ghz with 1.225v but i will leave that for another day...