"Stable" overclock, issues

FPSUsername

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Oct 19, 2014
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Hello,

I overclocked my i5-4690K and I'm trying to get it stable. I ran aida64 for 10 minutes at 4.5GHz, 1.25V and it has no problems at all. So I tried to play csgo and my computer almost instantly freezes and crashes. This didn't happen in other games that are not using the source engine, they all ran fine, except for starbound (+starbound server).
I tried with 1.35V, disabling c-states, still the issue presists.
Besides that, my pc had trouble with cold boots, it did not post at all when overclocked on 4.5GHz, I had to clear cmos, restore my profile and boot from there. (Okay, this was because my ram's boot option was set to auto, I have it on normal now, no problems with cold boot)

Now I know that I have a tier4 psu (thermaltake Smart series SE 530W), so I tried a test with OCCT. Nearly instantly it crashes with 4.5GHz, 4.4GHz. I turned it down to 4.2GHz and cpu offset +0.2V.
I managed to do an automatic 1min test without crashing.
I read that values on the voltages are not accurate (-12V shows ~6V), I already thought that this shouldn't be normal.

Can somebody check if these results are good/bad and what I should do?
http://imgur.com/a/ch7C8

System:
Gigabyte Z97X-SLI Rev 1.2 Bios ver F9
i5-4690K
Crucial Tactical Ballistix LP, XMP2, 2133MHz, (10-9-10-24), 1.5V (Tested and stable, overclocked)
Asus GTX-560TI DirectCUII Top 1GB 1.0375V (Tested and stable)
Crucial MX200 SSD, Firmware MU03
Seagate ST500LM000, Firmware SM16


 
On the charts, I see that the cpu temperature is still rising when the test is ended.
What cpu cooler do you have?
How good is your case ventilation?
If you remove the case covers, does that help?

a vcore of 1.30 is as high as you want to go.
You may have just an average chip so 4.2 or so may well be your max.
You hear about higher overclocks from those with golden chips, but those with dogs are silent.


I see that your ram is overclocked.
I would run the ram at stock. I think the higher ram voltage needed for a ram overclock will take away the headroom for the cpu overclock.

Haswell performance is largely insensitive to ram speed.
Read this:
http://www.anandtech.com/show/7364/memory-scaling-on-haswell
 
then your overclock is NOT stable; lower multiplier or raise the voltage; try 4.4 ghz, 4.3 ghz etc



 


My case is the Bequiet SilentBase800 and my cooler is the Noctua NH-D14. Fan speeds are normal, I use the low noise adapters.
Fan speed front 2 fans ~600RPM
Fan speed back ~900RPM
CPU Fan speeds ~900RPM
I had my front opened for more airflow, the GPU is really noisy (I haven't found a worthful replacement yet).

Aida64 showed max 76*C with case closed on cpu test, 4.5GHz, 1.25V
This should not be an issue.
I'll try with stock ram speeds, stock XMP1 and stock XMP2 tomorrow.
 


I already run 4.2GHz at 1.3V (1.1V with +0.2 offset)
Forgot to mention, cache is running at 3.9GHz, Ring voltage is 1.05V with +0.1 offset
 


Should I turbo all cores to 4.4 or should I do 4.4 on core 0,1, 4.3 on core 2 and 4.2 on core 3?

PS: I'm wondering if I replace my gpu with a more power efficient gpu (like the 970), would it make cpu overclock more stable? I have 530W psu with 80+ bronze certification.
This gpu can not even be overclocked correctly, I managed to get 1GHz on core with 1.15V (which is a lot compared to other benchmarks where they reach 1GHz with 1.075V). My gpu runs at 1.0625V by default and I modified the gpu bios to run at 1.0375V and it is rock stable.
 


try 4 base and 4.4 turbo for all 4
 


CPU: OCCT almost instantly crashes, the first time it had an error on core 3 (it was in turbo mode, turbo mode is set to auto).
I've seen in CPU-Z that it draw 1.38V at some point, I have the idea that OCCT is like prime95 that it can draw more voltage than allowed.
I had set Ring voltage to auto, cache to auto (35) and cpu offset voltage to +0.175, it should run fine on 4.4GHz at 1.275V for sure.
http://imgur.com/a/NlBPp

CPU Max temps running that small test (using core temp):
Core 0: 70
Core 1: 68
Core 2: 69
Core 3: 65
 


I know, it didn't run windows at 4.5GHz at 1.2V as suggested to start a dirty OC.

Should I try this:
Stock speeds, auto voltage,
Benchmark with aida64 and check current voltage.
Manually set voltage
raise with 100MHz every time
Benchmark
If fails -> +0.025V
Retry

 
I have that same Mobo and an i5 4670k wich is very similar to the 4690k, first Don't use offset voltage and assume it'll be the highest cpu voltage. for exmaple I run normal vcore 1.1 plus .11 and that gives me 1.21 right? well under stress it went to 1.25 wich is a lot higher.

Fisrt use manual vcore not offset and find your maz ghz run the stress test for hours....
http://i.imgur.com/Cdrj2pW.png
now that you have found your best overclock, manually. try to adjust to offset to find a similar voltage if you want powersaving features
 


I'll start with 4GHz @1.2V, turbo mode disabled and windows power settings in performance mode. I'll benchmark tomorrow
 


 
It seems stable at 4.2GHz @1.2v (1.10h test), I even tried 4.3 (10 min test). At 4.4GHz I set the voltage to 1.225V and OCCT reported 1.25V. Did a 10 min test too (I know I should benchmark it longer). 4.5GHz at 1.275V ran fine too, but csgo crashed after 10 min. So I went back to 4.2 and will test 4.3 tomorrow.