Really weird overclocking problem.

[bigbossx]

PSU: EVGA Supernova 750w 80+ Bronze 

Motherboard: MSI Z97 G55 SLI

Cpu: i5 4690k

Voltage: 1.2

Multiplier 45x

 

So I successfully overclocked my cpu with the above configuration, it survives stress tests no problem and performs as expected during gaming and video conversion.

 

However, I get a single crash about 5-10 minutes after start up, no matter what I'm doing, whether its intensive or not, even when idle. Now I can load back up without changing any settings and its absolutely fine for the rest of the day, including stress testing. After shutting it off overnight, turning it back on the next day within 5-10 minutes I'll have another crash. Just a single lone crash shortly after start up. This stopped for a couple of months but has recently started happening again so am looking for a solution as I'm pretty puzzled right now.

 

Note this doesn't happen if I remove the overclock and revert everything back to default (obviously)

 

Any help would be greatly appreciated, please let me know if any further information is required.

 

[Geralt]

Try bumping up the voltage for just a tiny bit. See if that works.

Sounds to me like you're almost at stable but not quite there yet.

[SkilledRebuilds]

Bluescreen view lets you analyze the BSOD's you get time to time.

If your not getting a BSOD,.. and it's hard resetting/hardlocking then revert to stock regardless, if it happens when your at stock clocks...then it's not your overclock, but something else.

It could still mean the motherboard/cpu/memory/psu, but at least remove the OC factor and see if it still happens.

 

Should only take you 5-10 mins to see it right?

[bigbossx]

Sorry I haven't made it very clear. I have tried bumping the voltage up to 1.225 (yesterday/this morning but I'm sure i went to 1.250 when it was happening before), had the same problem, also tried lowering the multiplier a tad, no luck. 

 

It's not a BSOD, my PC just restarts and tells me something like (can't remember off the top of my head) Overclocking failed. Press F1 to go into bios and change settings, F2 to revert back to default values.

 

Also, my pc is fine if I restart at any point after that first crash. It's only when it's been powered off for some time and I turn it back on. 

 

What I really don't understand is if it's just an unstable overclock why does stress testing not reveal any issues? (I'm a bit of a noob)

 

Edit: I mentioned in my op that it doesn't happen with stock settings.

[hogfather]

are you using fixed voltage or offset?  Try fixed

try to increase the Load Line Calibration (this might be Asus terminology, so it this feature could be called something different by MSI)

have you done anything to your ram?  I would relax the timings a bit and maybe adjust the voltage by 0.05 

You might want to give your graphics card a little extra juice as well.  

[bigbossx]

are you using fixed voltage or offset?  Try fixed

try to increase the Load Line Calibration (this might be Asus terminology, so it this feature could be called something different by MSI)

have you done anything to your ram?  I would relax the timings a bit and maybe adjust the voltage by 0.05 

You might want to give your graphics card a little extra juice as well.  

 

I'm using adaptive voltage, but I used fixed initially to find my "stable" overclock. I haven't touched the RAM it's all at stock, I'll give that a go. I've already OC'd my GPU and that is fine. I'll take a look at the Load Line Calibration shortly.

[Geralt]

Quick question, how does LLC affect voltage and overclock?

If I slam LLC to max can I be able to lower my core voltage while still being stable?

[hogfather]

it compensates for something called voltage drop.  Slamming anything to the max probably won't an OC.  You are best of finding a balance between voltage, LLC and what ever else you have to fiddle with

.  

[FruitBasketSilex]

Quick question, how does LLC affect voltage and overclock?

If I slam LLC to max can I be able to lower my core voltage while still being stable?

Set it to about medium, what it does is it compensates for something called Vdroop, which is a drop in voltage when overclocked.