Bad overclocking with a Z87X-UD3H and 4670K.

[quetzalin]

There is a parameter called "K OC" i don't really know what it does, it is set to Auto but you can also Enable or Disable it.
- Didn't change Uncore ratio at all (set at Auto, i think it is 34x).
- Other voltage values are set to Auto (didn't touch anything related to RAM since i don't want to OC it - Ram X.M.P is set to Profile1 so it is running at default speed aka 1866MHz).
- Also disabled anything related to power save like C1E, C3, C6/C7, Thermal Monitor and EIST.
- Turbo Boost is disabled so all cores are running at the same speed.


As i said, the benchmark runs for about 1h until my computer reboots (this is with 4,1GHz), the max core temperature it reaches is about 70 degrees so i can't really raise my VCore anymore not until i change my cooler.

I've seen some people getting up to 4,3GHz without much hassle and even with a lot lower VCore.

So, i'm here to ask what i'm missing, if there is a value i should change, if my processor is really awful or if something is wrong with my motherboard.

Thanks a lot!

[stasio]

Re: Bad overclocking with a Z87X-UD3H and 4670K.

Maybe more info here:

http://forums.tweaktown.com/gigabyte/53053-haswell-overclocking-guides-results.html

Btw,
Haswell max. temperature is 100C.

[boondocks]

Re: Bad overclocking with a Z87X-UD3H and 4670K.

If you look around the net you will find that there is a large range of voltage for what is "stable" for Haswell. For example I run x47 all the time with 1.265 Vcore with a 4770K while many people can't even get x45 stable without more voltage.
Some of the guides on the net will help you decide if you need more vcore, vring or vccin.

You should probably set the uncore manually to make sure it does not increase by itself; increasing the uncore isn't going to do much for you anyway except in some benchmarks. One program to accurately monitor uncore & vring is HWINFO.

This link has some statistics & feedback that might help you:
Haswell Overclocking Guide [With Statistics]

[quetzalin]

Re: Bad overclocking with a Z87X-UD3H and 4670K.

Thanks a lot for the answers!, I didn't know about the guide you posted boondocks

[boondocks]

Re: Bad overclocking with a Z87X-UD3H and 4670K.

Setting C6/C7 to Enabled in BIOS will let the cpu vcore drop to between 0.1v- 0.2v at idle.

[nedooo]

Re: Bad overclocking with a Z87X-UD3H and 4670K.

Thanks a lot for the answers!, I didn't know about the guide you posted boondocks

That is quite high voltage for small OC, mine is on 4.5 GHz at 1.176v same CPU Z87-HD3 MB...rest on auto, and yes, bus on 100.03 to have CPU on 4.500 not 4.499 and RAM on 1600 not 1599...MHz :)
One thing my Vcore is set to normal and override is like +0.100v I did this to have scalable voltage otherwise it is stuck all time at voltage i set manually...
But some CPU are worse then others :(

[scracy]

Re: Bad overclocking with a Z87X-UD3H and 4670K.

Personally i would not use OCCT for stability testing Haswell way too much heat,something like AIDA 64 is better suited to Haswell and it stress tests all the instruction sets at the same time....