Any overclock setting crashes with stress test

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watchdog_error

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Apr 30, 2017
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510
My Build
2 exhaust fans on top, 1 exhaust on back, 1 140mm intake in front, cpu water cooler intake in front (with 2 push/pull ML120 Pro fans [high static pressure]) PSU in from the bottom.

I just upgraded my cpu from an i5 6600k (was running OC @4.4 for over 6 months on BIOS setting). Now I have the i7 6700k which I wanted as I want to go into 4k gaming later. That aside, my problem is that I have been 2 days at manually entering freq and vcore settings even trying the BIOS settings and no matter what settings I put in any overclock at all will crash the computer with nearly any stress tester.

I have reseated the cpu once and reapplied thermal paste 4 times. I use about a pea sized dot. Its the same method I used on the i5 and it ran flawlessly.

I've got crash errors from Service Exemptions to Watchdog Errors to Fltrmgr.sys errors on stress tests and sometimes even just plain ol failed.

Zero problems with my machine until I stuck this i7 in it. So, any ideas on this? Its really driving me crazy. Maybe bad chip? Any help is appreciated. Thank you.

**UPDATE** Well I decided to give another shot at thermal pasting. I noticed a loose plug when I did this. Stupid me the plug for the pump came unplugged but was still sitting there looking like it was plugged in. After fixing that and a fresh coat of paste my actual stability issues seems minor and temps are looking good otherwise. But oddly enough, even though everything is seemingly running fine stress tests still crash my computer and I still have no idea why. Looking at Aida it failed as soon as it put an 100% load on.

11fLYqX.jpg
 
Solution
BigBoomBoom
Which clock multiplier and at what voltage? What's the error message when BSOD? Have you tried increasing the voltage? Are you using XMP Profile 2.0 for your RAM? You may need to check if it's the RAM that is the problem, you may want to raise VCCIO and VCCSA as well.
Have a look at the guide, it's very useful as it lists all mobo BIOS and the different terminology that refer to the same thing (Gigabyte may call it CPU VCore and another Maker call it CPU Core Voltage).
http://www.tweaktown.com/guides/7481/tweaktowns-ultimate-intel-skylake-overclocking-guide/index.html
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BigBoomBoom

BigBoomBoom

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Apr 9, 2017
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Which clock multiplier and at what voltage? What's the error message when BSOD? Have you tried increasing the voltage? Are you using XMP Profile 2.0 for your RAM? You may need to check if it's the RAM that is the problem, you may want to raise VCCIO and VCCSA as well.
Have a look at the guide, it's very useful as it lists all mobo BIOS and the different terminology that refer to the same thing (Gigabyte may call it CPU VCore and another Maker call it CPU Core Voltage).
http://www.tweaktown.com/guides/7481/tweaktowns-ultimate-intel-skylake-overclocking-guide/index.html
 
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watchdog_error

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Apr 30, 2017
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510
Hey, thank you for the reply boom boom.

Currently I'm using 45 multi on 1.33 vcore. Besides the failing stress test my system seems stable now. If I try to go any higher the BSOD I usually get is CLOCK_WATCHDOG_TIMEOUT or SYSTEM_SERVICE_EXCEPTION. I've tried a lot of different settings with both XMP on and off. Right now I have it enabled. I'm bit new on over clocking. I've done quite a bit of reading on it but this is the first I've seen with messing around with VCCIO although I did see the option for it in BIOS. Not exactly sure what it does. I'll read through the guide tonight and see what I can get out of that too. Thanks again for taking your time to help out.

**Update** I fired up Aida again and did the tests one by one. It appears the Stress Cache is failing my stress tests. I was reading the guide a bit today that you linked me too and I noted that gigabyte calls cache uncore. I went in BIOS and was trying to play with the uncore freq multi I was trying to shoot for 43 but without realizing it I typed 23. It actually ran for about 5 seconds before failing went I went back into BIOS I realized my mistake and I changed it to 42 this time and it crashed right away. The default setting is 4.0 which was also crashing it.

Anyone know anything about the cache settings? Am I messing with the right setting? I will try to do some more research on it in the meantime.
 
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BigBoomBoom

BigBoomBoom

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Apr 9, 2017
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You normally don't touch uncore prequency until you have a stable overclock. Raise more voltage, try 1.35V and turn off XMP profile. If that doesn't work you have to raise more voltage. Get CPU stable first before working on RAm, then if they are both stable you can tweak uncore frequency. It isn't stable if you fail AIDA64 test, it's one of the tamest stability test.
 
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watchdog_error

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Apr 30, 2017
4
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510
Well I took your advice. After I studied the guide you showed me a bit more (which was much better than the others I have seen) I just reset everything back to default and went through the incrementally only touching the volts and frequency. After 5 minutes in Aida I'm running stable on 1.39 vcore at 4.5Ghz. After that I turned on XMP and used the relax OC setting mentioned in that guide also. Ran Aida again and still stable after 5 minutes. Temps are around 68-75 C at full load. I will read the guide some more and continue to tweak some before I go back to testing with Intel Burn Test.

I suppose after getting amazing results on BIOS OC with my i5 6600k I thought it should be easier to get stability. I was trying to adjust too much at a time and not take things one at a time. Anyways, I very much appreciate the help Boom Boom. The guide was very useful too. Thank you.

gwJqmX0.jpg
 
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watchdog_error

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Apr 30, 2017
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510
Just one last update for anyone looking at this wit a similar problem. I was able to achieve stable OC with way too much volts for the frequency I was running. However, Intel burn test was an immediate freeze and games would get sudden massive fps drops intermittently. I continued to play with settings and study more about overclocking with no luck at all. One night I stumbled on a recommendation to fix the fps drops to do a clean install of Windows. After doing that my fps troubles were fixing and now I'm running stable 200 MHz faster at 0.02 less volts (3.7ghz @ 1.37 v) I could probably get 3.8+ but I'm happy where I I'm at. My temperatures are much better looking and much more stable.

TL;DR - if you're having a hard time overclocking or getting sudden fps drops you may want to try a clean install of Windows. It worked for me.
 
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