i7-4790k strange behavior (boosts to 4.4Ghz on 4 cores)

[JkB_SlH]

I would like to share some strange behavior and solution for intel turbo boost high overclock which result in high temperatures.

 

intel's specifications showing the following boost specs :

 

1-2 core load = 4.4Ghz

3 core load = 4.3Ghz

4 core load = 4.2Ghz

 

For some reason which I will be happy if someone can provide a reasonable explanation why it happened ! , the cpu reached 4.4 Ghz on 4 core 100% utilization rather than 4.2Ghz.

As a result of that the CPU temps reached 85 C.

 

I went into the bios disabled the "intel turbo boost" restarted the PC and re-enabled it -> now it will boost to 4.2Ghz on 4 core load, the temps now are up to 73 C.

 

Is that normal !?

I'm worried that it won't role back to the previous behavior and shorten the life of my CPU !

[comicsansms]

I believe that means it is a better CPU, than the average CPU when they were rated.

Along as it beats the Box specification it should be fine. 

[Guest]

I would like to share some strange behavior and solution for intel turbo boost high overclock which result in high temperatures.

 

intel's specifications showing the following boost specs :

 

1-2 core load = 4.4Ghz

3 core load = 4.3Ghz

4 core load = 4.2Ghz

 

For some reason which I will be happy if someone can provide a reasonable explanation why it happened ! , the cpu reached 4.4 Ghz on 4 core 100% utilization rather than 4.2Ghz.

As a result of that the CPU temps reached 85 C.

 

I went into the bios disabled the "intel turbo boost" restarted the PC and re-enabled it -> now it will boost to 4.2Ghz on 4 core load, the temps now are up to 73 C.

 

Is that normal !?

I'm worried that it won't role back to the previous behavior and shorten the life of my CPU !

as long as it doesn't hit 90 (thats when the chip degrades) your fine. If you have any overclocks disable them, Also what are your idle temps an what about a CPU cooler?

oh and if you have some thermal paste, try re-applying that

[Levent]

I have never seen ITB clock higher than it supposed to, which app you were using to monitor core speeds?

[AnonymousGuy]

Mine is always at 4.4 Ghz.  I think it's an Asus thing to presume that 4.4 Ghz is a "safe" overclock no matter what.

[Majestic]

I believe that means it is a better CPU, than the average CPU when they were rated.

Along as it beats the Box specification it should be fine. 

 

No, it's a trick board manufacturers use to win the benchmarks. They just add 2 multipliers to the boost table.

It's usually called "enhanced boost" or something along those lines. It's also usually unknown to those board manufacturers how good the chip is, so they add a voltage that will guarantee the succes of the overclock. Usually something like 200mv. Disabling it helps with thermals significantly.

 

I would recommend you find it, and disable it OP. It's always a bad feature. If you want to overclock, do it manually.

[Mew]

Turn off multicore enhancement or something along the lines. 

[JkB_SlH]

as long as it doesn't hit 90 (thats when the chip degrades) your fine. If you have any overclocks disable them, Also what are your idle temps an what about a CPU cooler?

oh and if you have some thermal paste, try re-applying that

Idle temps are 29-33

[JkB_SlH]

I have never seen ITB clock higher than it supposed to, which app you were using to monitor core speeds?

CPUID HWMONITOR

[Guest]

Idle temps are 29-33

Idle temps are normal, Are you running it in Prime95? or something like AIDA

[JkB_SlH]

Idle temps are normal, Are you running it in Prime95? or something like AIDA

Yes, Prime95

[Majestic]

The high temps, as I already explained, are due to the increase in voltage by that enhanced turbo/multicore enhancement. Just disable it

[Guest]

Yes, Prime95

Is voltage fixed or set to auto? Prime will run more voltage through your chip if its set to auto. Fixed, it wont. Thats why the temps are so high, Try running AIDA's stress test, its more realistic, your temps will definitely go down

[UltraNeonGaming]

That's happening because some motherboard brands do that when you enable XMP for your memory. They will make the highest boost clock apply to as many cores as possible, many motherboard makers might also raise the core voltage which I really don't like happening.

I know my Asus motherboard does that whenever XMP is enabled, it also gives me a warning when I enable XMP saying that I need a good cooling solution.

[UltraNeonGaming]

SNIP

OP please remember to follow your thread or else you won't be notified when someone posts in them