Stable i7 5820k 4.8GHz and 1.4v voltage.

[grimsonfart]

Hi. I just got my new PC yesturday and decided to overclock it til it crashed. Managed to get up to 4.8Ghz and a 1.4v core voltage. After 10 minutes of stress testing the temperatures peaked at 82 degrees. What do you guys think?

 

[turkey3_scratch]

Either get some water cooling or lower the overclock, 82 is a bit high.

 

[grimsonfart]

82 is not really that high... Remember it's under 100% for a long period of time, while say gaming it rarely goes above 50 degrees (even in Arma).

 

[turkey3_scratch]

82 is not really that high... Remember it's under 100% for a long period of time, while say gaming it rarely goes above 50 degrees (even in Arma).

If it's not really high then why are you asking about it? I never said it was really high I said a bit high. Will it cause any harm? No. You'll be perfectly fine with that

 

[grimsonfart]

82 is not really that high... Remember it's under 100% for a long period of time, while say gaming it rarely goes above 50 degrees (even in Arma).

If it's not really high then why are you asking about it? I never said it was really high I said a bit high. Will it cause any harm? No. You'll be perfectly fine with that

I didn't really ask about the temperature, more about the clock since i see a lot of people getting much higher temperatures at lower clocks

 

[CompuTronix]

Guys,

First things first.

Please define "load" and "100%".

What is your ambient temperature? It matters.

Standard ambient is 22C, upon which Intel's Thermal Specification "Tcase" is based. Tcase for your i7 5820K is 66C - http://ark.intel.com/products/82932/Intel-Core-i7-5820K-Processor-15M-Cache-up-to-3_60-GHz

Tcase is CPU temperature, not Core temperature. Core temperature runs 5C higher than CPU temperature due to sensor location. Tcase +5 makes the corresponding Core temperature 71C. Throttle temperature is 100C.

When you put it all together it looks like this:

Standard Ambient = 22C
Tcase (CPU temp) = 66C
CPU / Core offset + 5C
Tjunction (Core temp) = 71C
Tj Max (Throttle temp) = 100C

Mid-70's are fine for everyday real-world workloads.

Maximum recommended core voltage for 22 nanometer processors with respect to "electromigration" is 1.300.

CT

 

[grimsonfart]

By 100% load i mean it's running at a 100%, i don't know how to elaborate more. As for ambient i assume you mean idle or low load, the hottest core is at around 30C, while lowest is at around 23C.

I'm honestly not sure what you mean by the rest you said, i'm no expert at this. But are you saying i'm fine with these temperatures or not? And is a voltage of 1.4v bad for long term use?

 

[CompuTronix]

What "software" are you using to drive a 100% workload?

Applications or games are unsuitable for comparing processor temperatures.

Ambient means room temperature, or more correctly, the temperature at your computer's air intake. Room temperature is close enough.

I gave you Intel's Thermal Specifications in my post above. I can't make an informed statement about your core temperatures until I know your ambient temperature.

1.400 volts is definitely too high, and will cause "electromigration", which is the premature degradation of your processor. 1.300 is the maximum recommended core voltage for your processors.

You should give this a read: Intel Temperature Guide - http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

CT

 

[grimsonfart]

When i mean 100% load i mean tested in software such as prime95 or any other stress test software.

And when it comes to voltage, what would you reccommend i have when the CPU is at 4.8GHz? Right now i'm using 1.25v at 4.4Ghz, no issues.

And my room temperatures is about 21 degrees.

 

[CompuTronix]

Thank you for the information. Unless I missed it, you haven't mentioned what cooler you're running.

Please download Prime95 version 26.6 - http://windows-downloads-center.blogspot.com/2011/04/prime95-266.html

For thermal testing, always run Small FFT's for 10 minutes.

Do not use the latest version, which is 28.5. Version 26.6 will test 10 to 20C cooler.

Standard Ambient is 22C, so your environment is close to ideal.

As for Vcore, I recommend that you don't exceed 1.250 on air, and 1.300 on liquid.

 

[grimsonfart]

Thank you for the information. Unless I missed it, you haven't mentioned what cooler you're running.

Please download Prime95 version 26.6 - http://windows-downloads-center.blogspot.com/2011/04/prime95-266.html

For thermal testing, always run Small FFT's for 10 minutes.

Do not use the latest version, which is 28.5. Version 26.6 will test 10 to 20C cooler.

Standard Ambient is 22C, so your environment is close to ideal.

As for Vcore, I recommend that you don't exceed 1.250 on air, and 1.300 on liquid.

Sorry i forgot to mention, it's a Corsair H110!

After doing some tests with 26.6 i got much cooler results. 4.7Ghz and 1.275 voltage gavev me a maximum temperature of 66C after 10 minutes. Going any lower than 1.275 at 4.7Ghz makes my computer crash so i guess it's a good spot.

 

[CompuTronix]

I think you found the sweet spot! I recommend that you declare a binary victory, click open numerous large overclocked beers, and enjoy your rig!

 

[grimsonfart]

I think you found the sweet spot! I recommend that you declare a binary victory, click open numerous large overclocked beers, and enjoy your rig!

Well that is great! Thanks a lot for your help mate!!

But as a last question, are my results average for the processor or did i get a good chip? My old 3770k was only able to go to 4.6Ghz no matter what..

 

[CompuTronix]

Your particular i7 5820K is most likely an upper 20 percentile chip. At a TDP of 140 Watts, the only reason your temperatures aren't 25C higher at 4.7GHz with your relatively elevated Vcore, is because Intel reverted back to using solder for the IHS instead if TIM.

You're within voltage specs, and well within thermal specs, so that places your rig in great standings! Enjoy!

CT

 

[Vellinious]

Thank you for the information. Unless I missed it, you haven't mentioned what cooler you're running.

Please download Prime95 version 26.6 - http://windows-downloads-center.blogspot.com/2011/04/prime95-266.html

For thermal testing, always run Small FFT's for 10 minutes.

Do not use the latest version, which is 28.5. Version 26.6 will test 10 to 20C cooler.

Standard Ambient is 22C, so your environment is close to ideal.

As for Vcore, I recommend that you don't exceed 1.250 on air, and 1.300 on liquid.

Sorry i forgot to mention, it's a Corsair H110!

After doing some tests with 26.6 i got much cooler results. 4.7Ghz and 1.275 voltage gavev me a maximum temperature of 66C after 10 minutes. Going any lower than 1.275 at 4.7Ghz makes my computer crash so i guess it's a good spot.

10 minutes does not equate to "stable". 1.275 @ 4.7 my dyin ass. roflmao

 

[CompuTronix]

10 minutes does not equate to "stable". 1.275 @ 4.7 my dyin ass. roflmao

Vellinious,

Three items:

First, we were not "stress" testing for stability, we were "thermal" testing for baseline core temperatures.

Second, this Thread is over 6 months old. Don't dredge up old Threads.

Third, and most important, PROFANITY IS NOT TOLERATED!

Terms of Use - http://www.tomshardware.com/terms.html
Forum Rules - http://www.tomshardware.com/forum/id-2083474/read-forum-rules-styling-posts.html

If you can't express yourself in a civil manner, then Tom's is not the place for you. Don't get yourself banned! This is your only warning!

This Thread is closed.