Normal i7 8700k 4.7 GHz OC idle temps are high?

[ravashstudios]

Hello! I recently purchased an i7 8700k and ML240L to do some heavy overclocking.

Room temperature is around 75°F, and my idle temps are around 41°C.

My vcore is 1.2V (I try to keep my voltage low, I want this CPU to live a while)

Do any of you overclocking enthusiasts know a good overclock for my system? I'd like it to last at least 7 years, as my previous build with an i7 2600 ran very well even today and would probably still run well at least another 2-3. (Got a pay raise, decided to treat myself to a new PC build, that's why I upgraded.)

Can anyone let me know if these idle temps are safe and can anyone recommend to me a safe overclock for my configuration? I would like to push the lifespan of this CPU as much as possible while retaining a powerful overclock.

 

[asoroka]

Ok a room Temp of 75C is dangerous for your health 🙂

if your idle temp is 41C then that is normal.

What happens to temp when you do a stress test.

There is no such thing as a 'safe OC' that can be recommended. It is always depends on the individual chip. One chip may be stable at 4.8GHZ while the next may not get above 3.8GHz.

So if you can run a stress test for a 4 hours without temperature getting to the throttling limit then you are safe, especially if you have not increased voltage. It is the voltage increase (and temperature) that reduces CPU life, not the clock speed.

 

[CompuTronix]

Is "idle" really idle? It should look like this:

You might want to read this Sticky: Intel CPU Temperature Guide - http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

See Section 8 - Overclocking And Voltage, and Section 13 - Thermal Test Idle.

CT

 

[ravashstudios]

Ok a room Temp of 75C is dangerous for your health 🙂

Haha that was a typo, messed up temperature measurements! Lol my bad haha. I'm American, I usually measure electronic/computer temperatures at Celsius because many programs and hardware monitoring tools I use measure in Celsius. I meant 75F, which is 24C.

if your idle temp is 41C then that is normal.
What happens to temp when you do a stress test.

When doing a stress test in CPU-Z my temps stay at 70C.

So if you can run a stress test for a 4 hours without temperature getting to the throttling limit then you are safe, especially if you have not increased voltage. It is the voltage increase (and temperature) that reduces CPU life, not the clock speed.

Yes I'm aware. I was just a bit worried since most forum posts I read said that they had pretty good idle speeds on an overclock. I'm running a 5GHz overclock now at about 1.25V, while the auto setting the BIOS sets is much higher and results in temps I'm not happy with.

Anyways I'm going to stress my CPU at 5GHz on CPU-Z for about 4 hours. Will my CPU get fried if I leave it on for too long, or is it safe? I'm a bit new to overclocking and stress testing and whatnot.

 

[ravashstudios]

Is "idle" really idle? It should look like this:

You might want to read this Sticky: Intel CPU Temperature Guide - http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

Yes, it does look like that. I'll be sure to take a look at that guide you made. Thanks!

 

[CompuTronix]

ravashstudios,

You realize that CPU-Z Bench Stress is only about 80% workload. Take as look:

Not all loads are created equal. “Stress” tests can be characterized into two categories; stability tests which are fluctuating workloads, and thermal tests which are steady workloads. Intel tests their processors at a steady 100% TDP workload to validate Thermal Specifications.

Prime95 version 26.6 Small FFT's is ideal for CPU thermal testing, because it's a steady 100% workload with steady Core temperatures that typically runs Core i variants with Hyperthreading and Core 2 processors within +/- a few % of TDP. No other utility so closely replicates Intel's test conditions.

• Prime95 v26.6 - http://www.mersenneforum.org/showthread.php?t=15504

Utilities that don't overload or underload your processor will give you a valid thermal baseline. Here’s a comparison of utilities grouped as thermal and stability tests according to % of TDP, averaged across six processor Generations at stock settings rounded to the nearest 5%:

Higher TDP tests produce higher Core temperatures. All tests will show 100% CPU Utilization in Windows Task Manager, which indicates processor resource activity, not % TDP workload. Although actual Power dissipation (Watts) varies with Core Speed, Core voltage and workload, Prime95 v26.6 Small FFT’s always provides a steady 100% workload, whether you’re running stock or overlocked.

CT

 

[mahanddeem]

5ghz at 1.25v! a very good 8700k you have.