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New to overclocking / 4790k / what am i doing wrong?

post #1 of 8
Thread Starter 
Hello everybody, this is my first post here smile.gif I would appreciate your kind help and knowledge about overclocking my 4790k.

I have this system for 3 years now:

4790k
Asus z97 pro gamer mobo
16GB 1866 ram
Noctua D15

Up until now I just ran the cpu in stock speed, the stock boost of 4.4 on all cores was enough for me (and still is actually). I mainly do gaming, analyzing my chess games with Houdini chess engine, and the usual surfing the web etc'.
Recently I decided to experiment a little in OC. all I want is mild OC to 4.6 (maybe 4.7 if I can get it in decent temps) just to squeeze the cpu a little more (I now care less about life span since I will probably upgrade my platform in the recent future so I am allowing myself to enjoy my system).
The only settings I changed in the bios are: clock ratio (all cores) and core voltage (manual mode) I also disabled speedstep and c-states (at least for the testing period). windows is set to high performance mode.

So I was able to achieve 4.6Ghz at 1.25 volts (achieved boot in 1.2 but couldn't pass cinebench).
now let's talk stability: with the aferomentioned OC (4.6 / 1.25) I can pass asus realbench benchmark as well as 1 hour of stress test with max temp of 70-71 c, I also pass cinebench (dah..) and intel XTU both the memory and cpu stress test for 1 hour.
In gaming, chess analyzing and everyday work all seem stable.

But I can't do 10 minutes of OCCT(large data set) without getting BSOD. I tried to up the voltage up to 1.3 but still crash.
I have a weird feeling that the voltage is not the problem here. could it be something else beside the core voltage that I need to tweek to get that extra stability?
I don't want to touch parameters that I don't understand, so the only thing I know is upping the voltage..but it seems to not do the trick.

Any help would be appreciated.
post #2 of 8
Quote:
Originally Posted by patishi View Post

Hello everybody, this is my first post here smile.gif I would appreciate your kind help and knowledge about overclocking my 4790k.

I have this system for 3 years now:

4790k
Asus z97 pro gamer mobo
16GB 1866 ram
Noctua D15

Up until now I just ran the cpu in stock speed, the stock boost of 4.4 on all cores was enough for me (and still is actually). I mainly do gaming, analyzing my chess games with Houdini chess engine, and the usual surfing the web etc'.
Recently I decided to experiment a little in OC. all I want is mild OC to 4.6 (maybe 4.7 if I can get it in decent temps) just to squeeze the cpu a little more (I now care less about life span since I will probably upgrade my platform in the recent future so I am allowing myself to enjoy my system).
The only settings I changed in the bios are: clock ratio (all cores) and core voltage (manual mode) I also disabled speedstep and c-states (at least for the testing period). windows is set to high performance mode.

So I was able to achieve 4.6Ghz at 1.25 volts (achieved boot in 1.2 but couldn't pass cinebench).
now let's talk stability: with the aferomentioned OC (4.6 / 1.25) I can pass asus realbench benchmark as well as 1 hour of stress test with max temp of 70-71 c, I also pass cinebench (dah..) and intel XTU both the memory and cpu stress test for 1 hour.
In gaming, chess analyzing and everyday work all seem stable.

But I can't do 10 minutes of OCCT(large data set) without getting BSOD. I tried to up the voltage up to 1.3 but still crash.
I have a weird feeling that the voltage is not the problem here. could it be something else beside the core voltage that I need to tweek to get that extra stability?
I don't want to touch parameters that I don't understand, so the only thing I know is upping the voltage..but it seems to not do the trick.

Any help would be appreciated.
OCCT is far more stressful than Realbench smile.gif If what you actually use your P.C for doesn't result in blue screens I wouldn't worry too much. You passed Realbench stress test right?
post #3 of 8
Thread Starter 
Hi scracy, thanks for the reply.
Yep...I passed 1 hour of realbench stress test as well as Intel XTU which for me..1 hour + gaming session without issues are enough. That's why I run this OC right now and I am happy with it smile.gif

I know that OCCT and prime95 are much more stressful and that's exactly why I am interested to know why am I failing those? Could it be something else beside the voltage that I need to tweak? (just for knowledge sake)
post #4 of 8
Quote:
Originally Posted by patishi View Post

Hi scracy, thanks for the reply.
Yep...I passed 1 hour of realbench stress test as well as Intel XTU which for me..1 hour + gaming session without issues are enough. That's why I run this OC right now and I am happy with it smile.gif

I know that OCCT and prime95 are much more stressful and that's exactly why I am interested to know why am I failing those? Could it be something else beside the voltage that I need to tweak?
Not really OCCT is basically Prime95 with a different interface and not really a recommended stress test for the CPU that you have, its not unusual for 4770K/4790K to fall over with Prime95, if it is stable with Realbench and you dont have issues during normal use I wouldn't be concerned, maybe try a 4 hour Realbench stress test to be sure smile.gif
post #5 of 8
Thread Starter 
ok thanks a lot! perhaps I shouldn't try to force OCCT.
I will try to run realbench for a longer duration just for assurance.
Edited by patishi - 10/12/17 at 2:38am
post #6 of 8
Quote:
Originally Posted by patishi View Post

ok thanks a lot! perhaps I shouldn't try to force OCCT.
Have a read of the opening post http://www.overclock.net/t/1490324/the-intel-devils-canyon-owners-club for some reason Haswell doesn't play nice with Prime95 smile.gif
post #7 of 8
Thread Starter 
Hi again, just an update:
I finally got "stable" in OCCT, and my final OC right now is: 4.6Ghz at 1.309 volts. I tested 1 hour and 10 minutes (just to be sure) on the large data set, and another 1 hour on medium.
after that I also tested RealBench benchmark for 5 times in a row.
I tried to get to 4.7, but I couldn't be stable even at 3.6 voilts, and I really didn't want to push my chip any further than that, especially when running on air (my case is also warm - Fractal define c) Too bad frown.gif
(After that failed 4.7 attempt I ran the large data set test again at 4.6 / 1.309 and it went smooth).

By the way, I did disable "Asus Multicore Enhancement". I don't know exactly what this setting does, but I didn't want to take the chance that It might have caused stability issues.
Anyway..this is my final conclusion. thanks again for the tips and successful overclocking to you all smile.gif
post #8 of 8
Read the Haswell and DC threads the testing etc. is explained there.
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