PC behaves strangely after overclock

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notechlogic

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May 18, 2014
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The rig: I7 4770k, thermaltake SP-850M, EVGA SC 780ti, gigabyte Z87X HD3, 8gb Gskill ripjaws 2133mhz, a corsair H60 and some 2tb Toshiba HDD.

The problem: After using gigabyte appcenter to apply a moderate 4.3 overclock to my cpu I've come to notice weird problems with my pc that seem to disappear when the overclock is removed. My pc will go into a booting loop where i'll see the gigabyte screen two or three times without getting to my password screen before eventually booting. Sometimes my pc will not boot at all. When it does boot, I get horrible performance out of my GPU with fluctuating loads. MSI kombustor shows the clock speed where it should be, but the load bounces between 60% and 80% without going above 80. At this point I can say with 100% certainty that this problem is related to overclocking of my cpu.

Questions: Is this an effect of a bad overclock? If so, how can I prevent it while still being able to OC? Could this potentially be a sign of a defective CPU, and if so how would I go about an RMA without admitting to intel that I've already overclocked and voided my warranty? Any help would be greatly appreciated!
 
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DonQuixoteMC

DonQuixoteMC

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The auto-overclocking options are always sub-optimal as you have little control in ensuring a stable OC.

To diagnose the problem, we need to know what OC settings you're running at (Vcore voltage, CPU in voltage, voltage settings [adaptive, fixed etc]), we need to know CPU temperatures as well.

I recommend installing CPUID and HWMonitor for monitoring the OC and your hardware (temperatures).

A possibility is that your computer has a hard time posting with the voltage settings (too high, too low) or that your processor is running too hot, throttles, and bottlenecks your GPU leading to low loads.
 
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Dogsnake

Dogsnake

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What do you mean by Gigabyte appcenter? Are you applying your OC values from the bios? What are the values or settings you are using? Yes clearly the OC values being applied are not stable. I doubt you have damaged anything. Take a look at this (http://www.overclockersclub.com/guides/overclock_intel_4770k_guide/) and see if following the guide solves your issue.
 
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notechlogic

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So should I be overclocking in bios? I'm also back at stock clock settings and a bit nervous about trying to use EZtune again. Dogsnake, easy tune is a software from gigabyte that has options for one click overclocking to 4.3Mhz. Other than that I have no idea what values were changed by this, but i'll be sure to check out that guide and see if I can find stability.
 
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DonQuixoteMC

DonQuixoteMC

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Go into BIOS, avoid auto-overclocking settings.

Look for an option to "sync all cores" or something along those lines.

Set CPU ratio from Auto to manual, set it to 46.

Set voltage from auto to fixed.

Set the voltage at 1.2V

Hit F10, save and exit.

Now when booting your computer, it will either start successfully, or not. If it starts successfully, you have a good overclocker. If not, you most likely have an average chip.

Now, if it boots successfully, quickly start HWMonitor (install it first if you haven't already) and check your temperatures. If they are around 30-45 then so far so good.

Now how you stress test depends entirely on your uses. If you work with highly important data, where a crash and dataloss would be devastating, then I recommend you avoid OCing all together. If you encode a lot of videos and would lose a lot of progress, then you would want to ensure rock-solid stability (Prime95, IntelBT, Aida64 etc.), if you just plan on gaming, then test with a CPU intensive game like BF3 or BF4.

When testing, you'll often get BSODs. Don't worry, just change setting. (Lower clock-speed/increase voltage)

Now, I would like to research the capabilities of your Motherboard before I make any solid recommendations. I'm having a hard time finding the Z87X HD3. Just to confirm, could you link the motherboard you bought?

For the time being, stick to moderate overclocks, nothing extreme. Try 4.3 at 1.2V and decrease voltage until you're unstable.
 
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