4790k OC trouble

[GhostHitWall]

Hi all,

 

I just started overclocking.  This build has been running stock for 3 month and no problem at all.

4790k+Asus z97-Deluxe, I made sure BIOS is up to date.  I am trying to stable my overclock. Any help would be appreciated.

 

I only changed core ratio and vcore. and test run with AIDA64/Prime95 Blend.  RAM X.M.P enabled 1.65V 2400mhz 11-13-13-31-2N

 

4.6ghz 1.25v made to desktop, BSOD in 15   mins while stress testing.  Max temp at 75, avg 68.

4.6ghz 1.26v made to desktop, BSOD in 60   mins while stress testing.  Max temp at 76, avg 68. 

4.6ghz 1.27v made to desktop, BSOD in 200 mins while stress testing.  Max temp at 86, avg 76.

4.6ghz 1.28v made to desktop, BSOD in 60 mins while stress testing. Max temp at 89, avg 79.

4.6ghz 1.29v/1.30v BSOD in 20 mins, temp went over 90 on all cores.

 

So I tried take it down to 4.5ghz at 1.25v, but I still BSOD in about 10 mins.  Temp didn't even reach 80. All cores avg under 70, max about 76.

 

Is there anything I am doing wrong?  Cuz by the results I saw, seems like everyone was able to reach 4.5ghz lower vcore 1.25v

[Clyne]

Silicon lottery............

[kizoku_95]

I am not exactly sure if it will work or not but try lowering your RAM speed to like 1600MHz and try overclocking your CPU !

[airdeano]

Hi all,

 

I just started overclocking.  This build has been running stock for 3 month and no problem at all.

4790k+Asus z97-Deluxe, I made sure BIOS is up to date.  I am trying to stable my overclock. Any help would be appreciated.

Is there anything I am doing wrong?  Cuz by the results I saw, seems like everyone was able to reach 4.5ghz lower vcore 1.25v

 

may want to review this guide from @ProKoN: http://linustechtips.com/main/topic/41234-intel-haswell-4670k-4770k-overclocking-guide/

to me it sounds like you are shooting for the sun and missing,

you should start with minimal voltage on 4.4GHZ and work up. turbo is 4.4 (CPU-Z

is what voltage?)

also, on overclocking, you use 1600MHz on RAM timings as the IMC might need

some voltage tweaking to get the 2400 you tuning for. kinda rules out memory

stabilization errors. 1600MHZ @ 1.505v - 9-9-9-24-2

[GhostHitWall]

Thx for all

 

My ram came with the xmp built-in so I went with it.

I set them down to 1600mhz 9-9-9-24-2 1.5v

Restart oc, test with prime95

Here are the results.

 

4.4ghz, 1.22v, 4 hrs, max 85c, avg 68c

 

4.5ghz, 1.22v, 3 mins, max under 70c

4.5ghz, 1.24v, 5 mins, max under 70c

4.5ghz, 1.26v, 15 mins, max 75c, avg 65c

4.5ghz, 1.28v, I stopped torturing at 30 mins since max temp exceeds 90c, avg sits around 85c but feeling like it will get hotter very soon.

 

Now testing 4.5ghz 1.27v, been running for only 30 mins so far, max temp showed 92 again, avg at 80c

[pummetje]

adjust the vring voltage (cache voltage )  if you got memory over 2000mhz or so 

it will improve the stability of the cpu
 

[runit3]

---

What cooler are you using? Those temps seem a bit high for a 4790k at those voltages. It appears as if you have a good amount of voltage headroom, but your temp headroom rapidly diminishes above 1.26v -something I've only seen on Pre-Devil's Canyon 4770/4670K's; could just be the chip lottery, but slamming into 90+C @1.28v is unfortunate.

[GhostHitWall]

adjust the vring voltage (cache voltage )  if you got memory over 2000mhz or so 

it will improve the stability of the cpu

 

thx for the tip, how much would you increase it? or should I take it by 0.1 each time?

 

 

What cooler are you using? Those temps seem a bit high for a 4790k at those voltages. It appears as if you have a good amount of voltage headroom, but your temp headroom rapidly diminishes above 1.26v -something I've only seen on Pre-Devil's Canyon 4770/4670K's; could just be the chip lottery, but slamming into 90+C @1.28v is unfortunate.

I actually have a custom loop hooks up with my 780ti.  

1 EK PE360 front in-take, 3 corsair AP120 push

1 Koolance 280 30 fpi top out-take, 2 Noctua AF-A14 pull

Squeeze all those into a NZXT H440.  

 

It turned out I got 4.5ghz at 1.27v stable for two hours by taking off the top panel.  Max at 86, avg under 80.  With the top panel closed, I got it over 90c again.  I guess it's insufficient airflow for my top and rear exhaust.  The loop itself feels pretty warm.

 

Should I switch to another case? Buy new Fans?

[runit3]

thx for the tip, how much would you increase it? or should I take it by 0.1 each time?

 

 

I actually have a custom loop hooks up with my 780ti.  

1 EK PE360 front in-take, 3 corsair AP120 push

1 Koolance 280 30 fpi top out-take, 2 Noctua AF-A14 pull

Squeeze all those into a NZXT H440.  

 

 Buy new Fans?

AP120's are not designed for rad use. NF-F12's, SP120's, or fans with a high (2.0mm/H2O+) static pressure are the way to go.

If the rad is mounted as a front intake you can try putting the fans into pull instead of push, may get a bit better result with the AP120's.

Aside from those two potential problems the only thing left would be the mount to the CPU or the CPU itself if it just happens to be a bad draw.

[GhostHitWall]

AP120's are not designed for rad use. NF-F12's, SP120's, or fans with a high (2.0mm/H2O+) static pressure are the way to go.

If the rad is mounted as a front intake you can try putting the fans into pull instead of push, may get a bit better result with the AP120's.

Aside from those two potential problems the only thing left would be the mount to the CPU or the CPU itself if it just happens to be a bad draw.

I apologize.  I meant SP120 performance edition.  There's only af and ap series I think.

 

After a fair amount of research, I think switching a case will probably be a overall good idea to even to push and pull.

Also would there be any good Static pressure 140mm fans? 

 

I tested 4.6ghz 1.31v for over 2 hours and temp max at 90c for only a few times and mostly below 80c.  This was done when both front and top panels were taken off.

I am trying to lower vcore back down to 1.3v and see how that goes

 

Thank you all for helping.  

[Wirerat]

set cache to 1.150v and 4.0ghz and do not touch it until core is stable.

[pummetje]

i needed to set the cache to 1.25v