Overclocking i5-3570K help needed

[CapsLuke]

Hi everyone!
I am trying to overclock my i5-3570K but i'd like to know which temps i shall not go over in full load. My current overclock is 3.8 ghz from 3.4 stock and running 20 minutes of prime95 blend test results in the highest peak of 81 C in full load.
I left the pc testing the entire night with cpu in full load and i found it freezed this morning. Too much oc? To much stressing test? It would have happened even at stock speeds with that stress amount? Is my cooler good to reach 4.0 ghz?
Any useful advice on overclocking this cpu is appreciated. Thanks for your help.
My specs:
Mobo asus p8z77-v
Cpu intel core i5-3570K
Cooler artic freezer 13
Psu coolermaster 600W (don't remember complete name)
Gpu amd radeon rx 480 8gb sapphire nitro+ OC
16 gb ram ddr3 @1333mhz

 

[ShadyHamster]

81c is perfectly fine for a stress test temp.
If the PC freezes while stress testing then you need to increase the voltage for the CPU.
The PC shouldn't freeze at stock settings while stress testing.

What voltage are you using currently? I would increase it a couple of steps and see what happens.
What version of Prime95 are you using?

 

[CapsLuke]

81c is perfectly fine for a stress test temp.
If the PC freezes while stress testing then you need to increase the voltage for the CPU.
The PC shouldn't freeze at stock settings while stress testing.

What voltage are you using currently? I would increase it a couple of steps and see what happens.
What version of Prime95 are you using?

currently cpuZ says i'm running at 1.288V (testing with prime95 right now). unsing v289 version of p95

 

[CapsLuke]

i have now tried adding more 0.005V and increasing the multiplier to 39. i am running right now blend test of prime95 and nothing seems wrong. i wanted to push it up to 4.0 ghz but right now (testing since 40 minutes ago) the highest temp peak was on core 2 and 3 getting me 87 C. guides suggest not to go over 90 C. do you suggest trying 4.0 ghz instead of 3.9 ghz without touchig voltage or i shall keep this configuration and run an 8 hours test? cpu z says that the max voltage i'm using is now 1.304 V.

UPDATE: tested that configuration and got freeze after exactly one hour, two times repeated test. i wonder how many ppl are getting 4/4.2 ghz with 1.25V... i get freezes with 1.3V @3.9ghz...

 

[CapsLuke]

MERGED QUESTION
Question from CapsLuke : "CAN'T OVERCLOCK cpu i5-3570K"

hi everyone,
i have an intel core i5-3570K and a asus p8z77-v.
i have followed so many guides from here and on reddit too, but whatever i do, every value i set the multiplier of my cpu, whatever voltage value i use, when i run prime95 blend test it always give me a total freeze after one hour testing. i tried 1.25v @ 3.9ghz, 1.3V @ 3.9 ghz, then i saw formus saying that with this cpu 1.15/1.2 is enough to reach even 4.1/4.2 ghz. just why i can't get even 3.6 ghz on 1.25V?? i am using artic freezer 13 cooler and a 600W psu by CoolerMaster with 16gb ddr3 @1333mhz untoched. what am i doing wrong?? here's the guide i followed most (i also searched here on tom's hardware a lot too). http://www.thinkcomputers.org/intel-ivy-bridge-overclocking-guide/

 

[ShadyHamster]

Sounds like you got poor overclocking chip.

I would find the voltage you need to stabilize 3.8ghz before moving up to 3.9/4.0ghz.

The latest prime95 really pushes CPUs, try using v26.6, this should give you much more reasonable temps.

Not to put a damper on your overclocking endeavours, but my locked 3570 oc's to 4ghz at 1.168v on an Asus P8Z77-V LE Plus board.
Maybe try updating the motherboard bios if you're not already using the latest one.

 

[CapsLuke]

i've set 1.25V and 3.8ghz. still getting crashes after one hour but i also found out that my hdd gets an error called S.M.A.R.T status bad, backup and replace. the strange fact is that it occured the first attempt to overclock (just putting +0.005V offset and mupltiplier from 34 stock to 36). btw my pc slowed down some weeks earlier than overclocking and a defragmentation had fixed the issue... so i am assuming it is likely to be hdd lifespan to have come to its end. what is strange is that the error s.m.a.r.t. turned out right the very firs oc try. btw the drive has like 4 years so it could be it and this also explains that when i restored default settings into bios and started a 1 hour gaming session, it froze again, exactly the same way it does while i test my oc, after the same time always: 1 hour. is my conclusion right or am i missing something? maybe oc just accelerated hdd decease? thanks for your help btw, i appreciate it

 

[ShadyHamster]

I would load default bios settings and do a stress test and see what happens.
First i would leave it go at complete default settings to make sure its 100% stable, if it's not it could be a memory issue.
After the first run i would manually set the voltage to stock, set LLC to ultra high (the second highest setting i think?), do a quick 10second stress to check voltage then go back into bios and adjust the voltage to match the stock volts.
At stock the voltage will probably fluctuate a lot, so i would find the average and adjust to that.
Then retest that to make sure you are still stable.

I would probably get your HDD sorted out first though as that might be the cause of the restarts, unlikely but better to be safe then sorry.
It's probably just coincidence that your HDD started failing when you started OCing.

 

[CapsLuke]

from what i discoverd later on, every overclock i did was stable (i set llc to high which was helpful) and default bios settings give me the same freeze after one hour exactly as the overclocking mode did. this made me think that my oc was actually stable and, (i forgot to tell this before) everytime i boot i get the s.m.a.r.t. error so i have to press f1, go into bios, boot menu, and select hdd. doing a disk check with an utility downloaded reported that s.m.a.r.t. had some sectors damaged. also on my desktop a shortcut turned into a white sheet and when clicking "open file location" i found out it had been cancelled. this made me sure that hdd has to be changed for sure and it may had lead to those freezings. if not, why default settings give me the same freeze after the same time than overclocked full load test mode? let me know what could be better in your opinion, i'll follow your advices.

 

[ShadyHamster]

I would try a different HDD first to make sure that's not the root of the issue.
However if you are still experiencing freezing even at stock settings it could be a memory issue, i would test with memtest86 to make sure there are no memory errors.