i5-3570k overclock temps

[Seromontis]

I am attempting to find my highest stable overclock for my i5-3570k and I'm wondering if my temperatures are fine. I bought an aftermarket cooler (cooler master 212+). I currently have it set at 4.7ghz and the max temp I find in prime 95 is 85C. What would be the max temp I can get to in prime 95 without hurting the cpu long-term? According to cpu-z the voltage isn't getting to 1.3v it is between 1.28 and 1.296.

 

[cmdrdredd]

you need to be stable first of all and unless you have the best 3570k out there 4.7Ghz at 1.28v is not going to be 24/7 stable.

So run prime 95 blend for 12 hours. Then run Intel Burn Test and see the temps, you'll probably be up in the 90s.

 

[Yuriman]

cmdrdredd gives good advice. Prime blend, and see how hot it gets with IBT or LinX.

 

[cmdrdredd]

Just to be clear, running an Ivy Bridge that gets low 90c temps isn't necessarily a terrible thing. It shouldn't heat up that much during normal usage. However, you need to determine stability as a first step. If Prime blend crashes at any time then you aren't stable. If Event Viewer gets any WHEA errors at any time then you aren't stable. If any games crash, you're not stable etc.

 

[pantsaregood]

Ivy Bridge throttles at 105 C. If you want to play conservative and be safe, I'd advise keeping it under 95 C. A 3570K hitting 4.7 GHz on 1.3v doesn't sound too outlandish, either - 3770Ks will hit 4.7 GHz at ~1.32v, and they have the added burden of HyperThreading.

 

[Seromontis]

I ran prime 95 for 9hrs and got a max temp of 85C for the torture test: in place large FFTs. I figured this test would be more demanding than blend so I decided not to do blend, is my thinking on this wrong? I already did memtest86 to find the stability of my ram so I figured blend wouldn't test my cpu as hard.
I did 3 tests of that intel burn test and got a max of 95C. My results for the burn test were: 126.265s and 124.0225GFlops, 126.082s and 124.2021 GFlops, and 126.144s and 124.1407GFlops. The settings were stress level: max, threads: all, and times to run: 3. I figured 3 was good enough to see what the pattern is: heat up then cool down, restart process and do next test, etc. So it looks like my max temp on that was 95C.
What should I be seeing for max temps while hard gaming, like 70C? In heaven I was getting 66C for my cpu while finding the oc on my gpu.

 

[cmdrdredd]

You'll probably hit high 70s or low 80s gaming. BF3 or something that is using more CPU will be higher than others.

Blend in prime tests the memory in conjunction with the CPU. Vs just testing mostly the CPU. Did you get any WHEA errors at all?

Ivy Bridge throttles at 105 C. If you want to play conservative and be safe, I'd advise keeping it under 95 C. A 3570K hitting 4.7 GHz on 1.3v doesn't sound too outlandish, either - 3770Ks will hit 4.7 GHz at ~1.32v, and they have the added burden of HyperThreading.

3770k overclock better from the info I've gathered from forums. I've seen a higher average clock speed at lower voltage with 3770k systems.

 

[Seromontis]

It was still running when I woke up and I didn't see any error messages or weird stuff on the screen, so I assume that means there were no WHEA errors. When I ended the test it said errors: 0 so I guess I should be fine then. So do you suggest blend over the one that I used even though I tested my memory with memtest86? Also looks like the voltage goes from 1.296 to 1.304.

 

[cmdrdredd]

WHEA errors hide in windows event viewer. Under Windows Logs > System

Voltage will fluctuate some.

I think blend is a better test myself.

 

[Seromontis]

Can you help me figure out where to find these WHEA errors? I looked in C:\Windows\Logs and couldn't find system. I'll run blend tonight and tell you the results. I plan on doing some gaming today to test my new oc, I play Tera and it's very cpu intensive, used 100% of my i5-760(reason why I upgraded).

 

[cmdrdredd]

Yeah...go to control panel > administrative toold > event viewer. Then click on windows logs and click system. In those logs scroll down and see if you see anything that says "Warning WHEA-Logger"

If you see errors there like that it means windows is getting errors and is correcting them as it goes along. In short this means you are not 100% stable because one of those errors could turn out to be uncorrectable.

 

[Seromontis]

I couldn't find any WHEA errors, even did a ctrl f. Played around 2 hours of Tera and max cpu temp of 73C, looks like I'm good to go then.

 

[cmdrdredd]

Yep, if no WHEA errors and prime runs through with no issues. Then you're all set.

 

[santilmo]

What software are you guys using for the temps? I noticed that RealTemp and the software by the mobo (Asus in my case) varies way too big for the load temps... I'm not quite sure how Asus computes for its CPU temp (since it is only showing one entry and not the per core basis).

I was only getting 65C to 70C for the Asus software (AI Probe) while I am already hitting 95C (highest core temp) with RealTemp though on the average it hovers 85C to 90C.

That by the way is just on stock speed, almost "auto" everything, and on the stock Intel HSF. Stress tested it via IBT (standard test only).

I just hooked up my NH-U12P SE2 yesterday and set RAM to XMP profile (I only have one option for my G Skill Ares 4x2 1600). Unfortunately, I still have to find time to benchmark my rig...

 

[cmdrdredd]

RealTemp reads the temperature from each core. The Asus software reads the diode and doesn't give an accurate reading at all.

 

[santilmo]

Got it....

By the way, is there a way to make Core Temp or RealTemp not trigger the UAC prompts without disabling UAC or lowering its notification settings? Not sure how to explain it but I think you know what I mean... since, I was thinking of putting them on my startup but it annoys me that I have to click "yes" in UAC everytime.

 

[ShintaiDK]

Max temp without hurting the CPU is 105C. Thats the temp Intel guarantees.

 

[Robin B]

Max temp without hurting the CPU is 105C. Thats the temp Intel guarantees.

Thats one thing, but does Intel say anything about how much vcore these cpu`s can handel?

 

[ShintaiDK]

Thats one thing, but does Intel say anything about how much vcore these cpu`s can handel?

Yep, its in the datasheets.

 

[Robin B]

I am running my 3750K@4400 1,22v. Hitting 71c in Prime with the Noctuna NH-D14, the weird thing is that the cooler is not getting hot at all.
Tried first 4,5 on 1,26v but got around 80c on IBT, so i am down to 4400. Will try later to see how low i can run the vcore on 4,5.

So what is safe temps and vcore for 24/7?

 

[cmdrdredd]

I am running my 3750K@4400 1,22v. Hitting 71c in Prime with the Noctuna NH-D14, the weird thing is that the cooler is not getting hot at all.
Tried first 4,5 on 1,26v but got around 80c on IBT, so i am down to 4400. Will try later to see how low i can run the vcore on 4,5.

So what is safe temps and vcore for 24/7?

On air anywhere around 1.35v at 95c is as far as I'll go.

 

[ryanfilips]

@ cmdrdredd

Hello dude, sorry for bothering u. I just want to ask u something
I recently bought a core i5 3570k, but my current cooler ( Thermalright Ultra 120A ) is limiting me at 4200 mhz. So i ordered a NH D14, which is coming up tomorrow I'm not planning to burn my cpu, i would rather try to stabilize it at 4.4-4.5 at around 1.26-7-8v. I just noted u are about the same specs, with the same cooler, and my question is : What temps should i expect ?
The case is Cooler Master HAF 932, i think that counts too.
Thank you in advance for your time m8, take care

 

[Yuriman]

^ Depends heavily on your chip, Ivy Bridge temperatures vary wildly because they use paste instead of solder between the core and heatspreader.

My results with a 3570K under watercooling:

4.3ghz is stable with no voltage offset.
4.4ghz needs ~1.192-1.200v and it Primes at 78c, Linpack @ 82c. I use +43mv offset with LLC disabled.
4.5ghz needs ~1.232-1.240v and it Primes at 84c, Linpack @ 91c. I use +89mv offset with LLC disabled.

I feel my chip runs particularly warm (bad gap under the IHS or paste issue or whatever) and I also feel that to an extent your cooler isn't really important if it's sufficient. At 4.5ghz under peak load, my chip is only pulling about 100w.

 

[crimsondr]

Great thread. Thanks for all the info cmdrdredd!

Overclocked my 3570k to 4.4ghz with no problems. Using a Noctua NH-D14. I could probably go higher but haven't bothered to try.

 

[tweakboy]

Card will even work at 100c Their made to get hot, just watch the stability.