Cpu temeratures before and after overclocking

[terminusx]

Hi guys,

I have some cpu temeratures results before and after overclocking that would be nice if you give some opinions and advices.
System:
I7 6700k before Oc 4.2ghz vcore Adaptive controlled by cpu(1.26 max in hwinfo)
after Oc 4.5ghz adaptive 1.35 llc 5 (1.39 max in hwinfo)
Gskill ripjaws V XMP 2666 15-15-15-35 1.2v
Asus Ranger VIII
Corsair rm650i
Cooler Master Seidon 120v version 2

Temps before OC:
Handbrake H265 medium preset
Core Average 57.25 Celsius
Handbrake 4.2

Prime 26.6 Small FFT
Core average 57.5 C

Prime 4.2

Temps after OC to 4.5ghz Adaptive Vcore 1.35 llc 5

Handbrake H265 medium preset
Core average 72.25 c

Handbrake 4.5

Prime 26.6 Small FFT
Core average 73 c

Prime 4.5

In OCCT Linpack I saw temps peaks to 86C

In Batman Arkham Origins I saw 75c max with Core average around 68-70 C

Room temperature 24c

What's your opinion? Should I downclock it for now. A better cooler is not possible.

Thanks for your time

 

[scout_03]

try to lower the voltage a bit that will help around 80 c it start to be hot .

 

[terminusx]

Thanks for your answer.

If I lower the voltage The system is not stable. I also tried llc 4 and the system crashed. I get 15c more if my system is OCed at 4.5ghz. I believe that 4.4 requires 1.35vcore in many skylake samples.

 

[scout_03]

did you only use the voltage to overclock you may try with lower voltage and raise the multiplier .

 

[terminusx]

How can I raise the multiplier without raising the vcore? And how can I overclock my cpu only with voltage? My overclock setting are: Bclk 100 Multiplier 45 vcore 1.35 llc 5

 

[scout_03]

see this if you made the same settings https://www.youtube.com/watch?v=FjIweExETlI

 

[terminusx]

Yeap. Exactly the same procedure. The thing is that my cpu is not stable at 1.325. And as far as I know many of the skylake samples need 1.35v to achieve stability at 4.5.

 

[scout_03]

see this on the forum and the link to overclock .net http://www.tomshardware.com/answers/id-2808863/cpu-results-skylake-cpu-6700k.html

 

[terminusx]

I have seen those posts for a while now.. The temps you are seeing on the overclock.net are with a delided cpu and hyperthreading off. Basicaly a delided skylake cpu could have 20c lower temperature + hyperthread off it's quite lower. I do not want to delid my cpu beacause of my warranty and the lack of proper tools. I also don't want to disable hyperthreading that's the reason I bought an I7 and not an I5.

 

[scout_03]

could you get a bigger air flow in the case that could help reduce cpu temp .

 

[terminusx]

Are those temps so bad? If yes I am going to downclock my cpu.. My NZXT S340 has very good airflow and all my fans are on their recomended speed.

 

[scout_03]

if you avoid going over the 75c and to have spike at 86 c cooling is good in your case .

 

[terminusx]

What would you do? Would you leave it as is or would you downclock it to stock? Thanks for your time

 

[scout_03]

i would put it back to defaul then raise to 4.3 play with and stress it with some bechmark for a few days to see how it goes under load then i would raise to 4.4 and do the same kind of test and if temp still safe try to level it between 4.4 and 4.5 until temp start to reach mid 75 c on full stress and load and does not spikes . that will be your safe overclock .

 

[terminusx]

Thanks very much for your help

 

[scout_03]

you could try to raise volt at 1.29 then 1.30 and see if temp is stable and voltage do not spike so far temp are good .

 

[terminusx]

I will try that next. Those spikes happening from the LLC. A level 4 LLC will keep the voltage tighter. Thanks very much for your time. You've been very helpful.

 

[scout_03]

your welcome be around .

 

[terminusx]

Yep it seems fine at 4.4 at 1.280volts with llc5. I boosted up the vcore to 1.290 just to let it have some headroom and I'll leave it with these settings for a while.. It passed 11 hours with x264 16T easily with max Cpu temp at 69 and average at 66. There is no need to push the situation more. An I7 is a very powerful cpu at its stock speed already.. A boost of 200mhz with good temps are more than welcome. Thanks again for your help.

 

[scout_03]

that is great temp and a safe overclock time to have fun .