Lockups 6600k

ternity

ternity

ternity

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12 Feb 2014
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277
Need help with my offset. I have my 6600k completely stable @ 4.5ghz 1.36v.

if I add an offset of +0.001 it'll be fine on benchmarks/stress tests, but on idle use and a non demanding game (world of warcraft) my pc will completely lock up. Screen freezes and the sound breaks. Not even a blue screen. (can take from 2 minutes up to 4 hours to crash)

I have to hold the power button and restart (can take from 2 minutes up to 4 hours to crash)

Any idea why this is happening and how to rectify? LLC is on, completely stable @ a fixed voltage.

Shall I decrease core voltage and increase the offset until I find it not crashing?

Been trying for days, and it's annoying me off because I want it to downclock when not in use.

Thanks a lot!
 
ternity said:
Need help with my offset. I have my 6600k completely stable @ 4.5ghz 1.36v.

if I add an offset of +0.001 it'll be fine on benchmarks/stress tests, but on idle use and a non demanding game (world of warcraft) my pc will completely lock up. Screen freezes and the sound breaks. Not even a blue screen. (can take from 2 minutes up to 4 hours to crash)

I have to hold the power button and restart (can take from 2 minutes up to 4 hours to crash)

Any idea why this is happening and how to rectify? LLC is on, completely stable @ a fixed voltage.

Shall I decrease core voltage and increase the offset until I find it not crashing?

Been trying for days, and it's annoying me off because I want it to downclock when not in use.

Thanks a lot!
Click to expand...

Well i would assume the OC is not stable
 
Ran realbench 8hrs, x264 8 hours, intel burn test very high 50 passes. I'd assume it was pretty stable after that.

it's not BSOD, it's just a freeze with an annoying noise.

Just did the freeze again - on a fixed voltage.
 
What's the rest of your system spec. Random lock ups could be cache, ram or several other things.
 
6600K, MSI Gaming Pro z170a, 16GB Corsair 2666MHZ ram, 980TI. I have the latest BIOS from MSI.

It was stable @ 4.5GHZ for weeks til I messed with the offsets, I also changed the SA Voltage to 1.05V as it was defaulting to 1.26V for some reason which is well over the 1.2 limit.

I also upped the cache to 4.5GHZ from 4.3, could this be causing the issue?

Here are the setting I used when stable - http://i64.tinypic.com/dyncxc.jpg - http://i63.tinypic.com/op1snc.jpg

Anything out of the ordinary? As I tried these settings again and still a lockup.

System is perfectly stable at stock.

Edit - also changed the cpu current limit to 150A as it was throttling clock speed when going past 95w on stress tests
 
Last edited:
This kind of idle instability seems to be a common recurrence on skylake systems. And I've had the same issue at the default 1.2v - auto volting (gigabyte).

I did a whole bunch of tests and determined that the instability is indicated most obviously by these 2 specific test:

1) Install adobe aftereffects CC 2015. --> will BSOD if unstable (idle freezing)
2) Run Prime 95 2nd test (in place FFT, max heat / power) --> will error out usually on the weakest core, with 'rounding error'.

So that saves a lot of time when playing with / trying to improve the OC settings.

Actually by running the Prime95 test it's always been failing for me on Core #2 (as displayed by HWMonitor), which is the 3rd core for me. So obviously I would have liked to have had the option to disable just that specific Core #3 only in my Gigabyte Z170 BIOS. Unfortunately it doesnt seem to have the option.

Tried altering a bunch of factors including:

* Uncore (ring bus) freq
* Memory speed

And determined that ^^ the above made no difference whatsoever.

The only 2 factors that made any difference were:

* CPU Core Freq
* CPU Core Voltage

Sitting on that voltage - frequency curve. Basic stuff. So in the end the solution simply was what you might naiively expect: to either up the voltage or lower the frequency (or a bit of both).

I didnt play with any voltage offset or other advanced regulator settings. At the moment its dialled into [1.4v 4.6 GHz]. However system is also stable at lower voltages and freqencies too. e.g. [1.3v 4.5 GHz], or [1.2v-auto 4.4Ghz].

Take from that what you will. However I would appreciate any extra help to be running at lower voltages. So if you do know of any more advanced settings to help run stable at a lower voltage. Probably not this offset you tried - which doesnt seem to work.

For me I recon its probably just the die has a bad core #2 in it. Wheras other 'better binned' parts may not have such 'dud' or 'weak' core in them, ie more uniform across the die.

Heck maybe its the thermal paste. Yet the temps across the cores all look reasonably similar. In fact the opposite of what you might expect: My 'weak-point' Core #2 seems to be running consistently 3-4^c cooler than the other 3 cores. Not sure at all what that means / is an indicator of.
 
Funny you mention that. My core 3 will fail the most on prime and is always 5-10 degrees lower temps even after reapplying thermal a few times... Will up the voltage and test after my clean install... But I can find a lot of posts about freezing while Idle on gigabyte forums, obvious a widespread issue even without overclocking
 
was just wondering if anyone could explain what these voltages are? I know VID (1.37) is my core voltage but the 1.377? It says LLC/Ring but I assumed the ring was tied in to the core?

f2rew2.png


Ty :)
 
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