Core #0 60 degrees at idle

deramatic351 · May 1, 2016

So I just overclocked my cpu by increasing the bclk to 125 from 100. It was a success as I saw better performance when rendering. Problem is, I get the temps from Core temp app and it shows something like this
On idle
Core#0=60-89 degrees
Core#1=19-47 degrees to TjMax
Core#2=15-42 degrees to TjMax
Core#3=14-49 to TjMax

As you may notice core 0 is hotter than the rest. Is this because my cooler is not evenly cooling the whole cpu?

maestro0428 · May 1, 2016

Not likely, its probably getting the most use. What are you using for a heatsink?

Quixit · May 1, 2016

You've definitely got some sort of monitoring error. There is no way your chip is 14C at idle. Average room temperature is about 22C and idle temperature should be about 5C higher than room temperature. It's fully possible that changing the bclk causes issues with the temperature monitoring, all of Intel's CPUs are designed for a BCLK of 100 and raising it can cause strange issues.

In general the only reason you'd get a big variance in temperature between the cores is if only some of them are loaded, it's not really possible for your cooler to only cool come of the cores because they're so close together. Remember that the actual CPU die under the heatspreader is tiny and all 4 cores are in there. Either you're cooling them all or you're cooling none of them.

On re-reading your post I noticed that you have some listed as temperature and some as "temperature to TJMax". Just to explain this, TJMax on all recent Intel processors is 100C so any temp listed as "temperature to TJMax" is the number of degrees between the temperature and 100C. So 60C is 40 from TJMax and 20C would be 80 from TJMax. Make sure you're reading the temperature correctly.

maestro0428 · May 1, 2016

I can't even get Core Temp to work in Windows 10. Im using Hardware Monitor. Give that a try.

deramatic351 · May 1, 2016

Quixit :

You've definitely got some sort of monitoring error. There is no way your chip is 14C at idle. Average room temperature is about 22C and idle temperature should be about 5C higher than room temperature. It's fully possible that changing the bclk causes issues with the temperature monitoring, all of Intel's CPUs are designed for a BCLK of 100 and raising it can cause strange issues.

In general the only reason you'd get a big variance in temperature between the cores is if only some of them are loaded, it's not really possible for your cooler to only cool come of the cores because they're so close together. Remember that the actual CPU die under the heatspreader is tiny and all 4 cores are in there. Either you're cooling them all or you're cooling none of them.

On re-reading your post I noticed that you have some listed as temperature and some as "temperature to TJMax". Just to explain this, TJMax on all recent Intel processors is 100C so any temp listed as "temperature to TJMax" is the number of degrees between the temperature and 100C. So 60C is 40 from TJMax and 20C would be 80 from TJMax. Make sure you're reading the temperature correctly.

i have a cooler master hyper 212 evo. Cpu is i7 3820. Clocked at 4.624 Ghz
I will replace with a aio cooler soon.
P.S. I ran a cinebench render test and temps maxed out at 88 degrees celsius.

deramatic351 · May 1, 2016

maestro0428 :

http://imgur.com/txAuAVX
My hardware monitor results
On idle

maestro0428 · May 2, 2016

Yeah, something must be wrong. My OC'd 3570k is at 28C right now. Remount the cooler and make sure not to overtighten it. Make sure its snug, but movable against the thermalpaste. BUT I would lower the base clock and see what that does too. Those chips run hotter and yours is clocked higher than mine...

deramatic351 · May 2, 2016

maestro0428 :

At stock clocks I'm running at 40-60 degrees on idle.
In fact, I increased my BCLK to 128 and aroung 70 degrees at idle.
So far so good with the temps! Hasn't shut down on me. Yet.

Quixit · May 2, 2016

Those are definitely high idle temperatures, but I think I've figured out why you're seeing them. If you look at the HWInfo screenshot is says your CPU running at 4625Mhz minimum. This means speed step isn't working and clocking down your CPU at idle. This is probably because of the BLK overclocking, I seem to remember this being a common side effect of doing that. It's not really a problem, because before speed step CPUs used to run at full speed all the time, but you're going to have to deal with the higher temperatures at idle if you want to use BLK overclocking.

maestro0428 · May 2, 2016

I use speedstep these days. Less heat, less energy use. Its still plenty fast too. You only really need to shut it off if you are benchmarking and even then I don't know that it makes much difference. I myself don't blk oc as it causes too many issues for me. But if its stable and you can take the heat, by all means.

deramatic351 · May 2, 2016

Quixit :

Oh yes I forgot to mention I disabled SpeedStep because I wanted consistency with the clocks.

Quixit · May 3, 2016

So, problem solved.

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