Intel i5 6600k oc problems

[eecano]

Hi guys,

I need some help overclocking my i5 processor. I am using the Intel Extreme Tuning Utility to oc the CPU but for some reason it keep throttling real bad. It spikes up and down over and over again when benchmarking. Is this normal or is it supposed to keep at steady oc. I increased the multiplier for all cores to 45x and also the cache. Voltage is at about 1.3v and temps spike to about 75C. Memory is also oc to 3399mhz. Anything you might think I am doing wrong? I will try to get screenshots of the graph so you can see how it spikes


CPU: Intel i5 6600k
CPU Cooler: Cooler Master Hyper 212 EVO
RAM: G.SKILL TridentZ Series 16GB (2 x 8GB) 288-Pin DDR4 SDRAM DDR4 3400 (PC4 27200)
MOTHERBOARD: ASUS Z170 PRO GAMING LGA 1151
GPU: EVGA Geforce GTX 970 4GB GDDR5
SSD: Samsung 850 Pro 256gb
HDD: WD Black Desktop 1TB SATA 6.0 GB/s 7200 RPM 3.5-Inch
PSU: EVGA 850W 80+ Gold Certified

 

[geofelt]

I think the easiest oc method is via the bios.
Leave all on default and just gradually raise the multiplier.
If there is throttling, it indicates that there is a temperature problem.

I like occt for testing. It shows you a graph of your temperatures and will shut down the test at 85c.

How well you can oc a 6600K is determined by your luck in the bin lottery.
Silicon lottery bins chips and sells the better ones for a price premium.
Here are some stats :
What percent can get an overclock at a somewhat sane 1.40v
I5-6600K
4.9 3%
4.8 23%
4.7 44%
4.6 85%

Leave the memory at 1.2v. That will translate to about 2400 speed.
I am convinced that more aggressive ram voltages take away the voltage headroom of the overclock.
Skylake does not depend on fast ram speeds for performance.
http://www.silentpcreview.com/article1478-page1.html

And... after you find a stable oc, use adaptive voltage and speedstep to reduce the multiplier and voltage when the processor is not under load.

 

[eecano]

I think the easiest oc method is via the bios.
Leave all on default and just gradually raise the multiplier.
If there is throttling, it indicates that there is a temperature problem.

I like occt for testing. It shows you a graph of your temperatures and will shut down the test at 85c.

How well you can oc a 6600K is determined by your luck in the bin lottery.
Silicon lottery bins chips and sells the better ones for a price premium.
Here are some stats :
What percent can get an overclock at a somewhat sane 1.40v
I5-6600K
4.9 3%
4.8 23%
4.7 44%
4.6 85%

Leave the memory at 1.2v. That will translate to about 2400 speed.
I am convinced that more aggressive ram voltages take away the voltage headroom of the overclock.
Skylake does not depend on fast ram speeds for performance.
http://www.silentpcreview.com/article1478-page1.html

And... after you find a stable oc, use adaptive voltage and speedstep to reduce the multiplier and voltage when the processor is not under load.

Thanks for the reply...would you recommend I switch to a watercooler intead to get lower temps and less throttling. I am only trying to get to 4.5ghz.

 

[geofelt]

No. Your oc limit is not temperature, it is vcore.
A vcore of under 1.40 can easily be handled by a simple air cooler.

I tested my chip with a spare downdraft cooler and had no problem with overclocking.
I abandoned my idea of using a noctua NH-D14 which I was planning on using because it was very large.
I am now at 4.8(with admittedly a good chip) using a noctua NH-U12s(single 120mm fan)

My canned rant on liquid cooling:
------------------------start of rant-------------------
You buy a liquid cooler to be able to extract an extra multiplier or two out of your OC.
How much do you really need?
I do not much like all in one liquid coolers when a good air cooler like a Noctua or phanteks can do the job just as well.
A liquid cooler will be expensive, noisy, less reliable, and will not cool any better
in a well ventilated case.
Liquid cooling is really air cooling, it just puts the heat exchange in a different place.
The orientation of the radiator will cause a problem.
If you orient it to take in cool air from the outside, you will cool the cpu better, but the hot air then circulates inside the case heating up the graphics card and motherboard.
If you orient it to exhaust(which I think is better) , then your cpu cooling will be less effective because it uses pre heated case air.
And... I have read too many tales of woe when a liquid cooler leaks.
google "H100 leak"
-----------------------end of rant--------------------------

Your pc will be quieter, more reliable, and will be cooled equally well with a decent air cooler.

 

[WhitxFang]

I have the same temperature problem with the same proccesor you have and i haven't even overclocked my cpu. But if you're going to overclock it just run it through the BIOS and there should be some pretty straight forwards steps to OC. (btw when im playing game i get like 70-80C from the cpu)

 

[geofelt]

ANY cooler you use(air or liquid) needs a source of fresh intake air.
To see if you are not getting enough, take the covers off of the case and see if that helps much.
If it does, look to case cooling solutions.

 

[eecano]

ANY cooler you use(air or liquid) needs a source of fresh intake air.
To see if you are not getting enough, take the covers off of the case and see if that helps much.
If it does, look to case cooling solutions.

Well I am pretty sure it is not the case. I just bought Corsair Carbide Series Air 540 High Airflow ATX and it has very good air flow. The room temp here is about 70 F so that's also not the problem.

 

[eecano]

I have the same temperature problem with the same proccesor you have and i haven't even overclocked my cpu. But if you're going to overclock it just run it through the BIOS and there should be some pretty straight forwards steps to OC. (btw when im playing game i get like 70-80C from the cpu)

Right now I have it clocked up to 4.39mhz and it is running pretty stable. It does get up to 87 degrees with Prime tests going for long periods but holds at about 82 with games. I simply put my multiplier up to 43x and also put my voltage fixed at 1.30v. My reference clock is at 102mhz so that my RAM can run at 3399mhz and its all running pretty fast at this point