2500k 24/7 OC

[Gus]

Hello everyone, I would like to have your advice on my OC.

Here is my config:

P8P67 EVO (1204) / i5 2500k / G Skill 2*4gb ECO 12800 CL8 / GTX 570 GLH / Antec CP 1000 / Antec P183 / 2*2Tb + 1Tb + 64Gb SSD

NH D14 and 4 noctuas in the case (2FLX + 2NFP) = very silent build

Im trying to find a 24/7 setup with 4.5-4.6Ghz with offset voltage, here is where I am:

Ram@920mhz (the step above PC12800, forgot the exact freq) @ 8 9 8 8 24 2

Memtest OK

CPU 100*46

LLC Auto

Phase Extreme

Duty Extreme

CPU capability 130%

Offset auto (1.04v-1.36v)

IBT OK (63-64.8 Gflops) (didn't go over 60-61°)

Unigine OK (1444 points~)

Vantage OK

Prime:

- Small FFT OK

- Large FFT Error

- Blend BSOD

I tried:

- ram @ stock = same

- LLC High and offset +0.05 (1.38v) = same (61° max)

- LLC High and offset +0.065 (1.39v) = same (63° max)

- LLC Ultra offset +0.065 (1.43v) = no BSOD but still error in prime (67° max)

- All the above with 100*45 = same

- Anything with a negative offset (even -0.01) will fail to boot

Note:

- On LLC and Offset AUTO, 100*48 will take 1.46-1.47v

- With LLC and Offset auto, 100*46 is stable with small FFT (30min, while other settings usually fail within 5min)

Do you have any advice ?

Can I run with 100*46 LLC Auto and Offset auto if only Blend or large fft fail ?

Should I forget the offset voltage and go for *48 and something like 1.38-1.40 ?

Remember it's for 24/7 use.

Thank you for your answers.

 

[SieB]

I don't know anything about manually overclocking on P67 boards so I can't help there but have you tried doing a auto tune with the Asus AI Suite II?

I did a auto tune on my P8P67 also with a 2500K and it did 4.6ghz @ 1.29v I ran prime for about 10mins and it was stable, couldn't test it for any longer because I only have a stock cooler at the moment and temps were going into the high 70s. I also ran Cinebench and did a couple of video encodes they ran stable as well.

 

[Gus]

I don't know anything about manually overclocking on P67 boards so I can't help there but have you tried doing a auto tune with the Asus AI Suite II?

I did a auto tune on my P8P67 also with a 2500K and it did 4.6ghz @ 1.29v I ran prime for about 10mins and it was stable, couldn't test it for any longer because I only have a stock cooler at the moment and temps were going into the high 70s. I also ran Cinebench and did a couple of video encodes they ran stable as well.

I tried autotune, but it's retarded... it reboots windows, eventually BSOD, then reboots again and goes into startup recovery, i have to wait like 10min for windows to do its thing (nothing actually), then I have to manually power off... I didn't understand that stuff :/ I might try it again.

 

[SieB]

I tried autotune, but it's retarded... it reboots windows, eventually BSOD, then reboots again and goes into startup recovery, i have to wait like 10min for windows to do its thing (nothing actually), then I have to push the button... I didn't understand that stuff :/ I might try it again.

Stramg

I never had a problem with it, it restarted once for me and when it booted into windows it ran a stabillity test and that was it. Did you run it from the BIOS or the Asus AI Suite from within Windows?

 

[Gus]

Stramg

I never had a problem with it, it restarted once for me and when it booted into windows it ran a stabillity test and that was it. Did you run it from the BIOS or the Asus AI Suite from within Windows?

From both I had windows startup recovery getting in the way... too fudging stupid !

After some research, I found that increasing VCCIO (but staying under 1.2v) could improve stability... It's on auto, but since I have 4gb sticks, i might need some boost there... i will try that tonight, and PLL overvolt too.

 

[SieB]

Also make sure you update to the latest BIOS if you are running version that came with the board, the newer ones give better stability and lower voltages.

http://www.asus.com/product.aspx?P_ID=erWGi4vbeZa8oxg8

 

[Gus]

Also make sure you update to the latest BIOS if you are running version that came with the board, the newer ones give better stability and lower voltages.

http://www.asus.com/product.aspx?P_ID=erWGi4vbeZa8oxg8

Already got it, running 1204 atm ^^

I may try to start from scratch, and go with manual voltage... even if it means less lifetime...

 

[Gus]

Okay, after clearmos, I got to 4.5ghz with High PLL and +0.07

But still got an error in prime after 2 hours... 1.4v max for 4.5ghz

crappy batch

 

[SieB]

Unlucky

Keep trying tough, and update to newer BIOS versions when they are released.

 

[Gus]

OMG I think they carefully chose the worst batch ever made and instead of trashing it they shipped it to me... my chip overclocks like shit.

Needed Offset+0.080 and LLC high (1.42v max) and serious bios tweaking to run prime blend without error for 2hours (74° max) @ 4.5ghz

Then I tried Linpack and got an error after 5 min... I can't believe it !

With this voltage some people almost do 1ghz more than me... eeewwwh

 

[SieB]

OMG I think they carefully chose the worst batch ever made and instead of trashing it they shipped it to me... my chip overclocks like shit.

Needed Offset+0.080 and LLC high (1.42v max) and serious bios tweaking to run prime blend without error for 2hours (74° max) @ 4.5ghz

Then I tried Linpack and got an error after 5 min... I can't believe it !

With this voltage some people almost do 1ghz more than me... eeewwwh

Feel bad for you man

I think my 2500k was from a bad batch as well, my core #3 runs 4-5c hotter that all the other cores

I have reseated the CPU and reapplied thermal paste and reseated the heatsink several times and it's still the same so non of those are the problem, it's definitely the CPU.

 

[Gus]

Feel bad for you man

I think my 2500k was from a bad batch as well, my core #3 runs 4-5c hotter that all the other cores

I have reseated the CPU and reapplied thermal paste and reseated the heatsink several times and it's still the same so non of those are the problem, it's definitely the CPU.

I got the opposite, my core #0 runs up to 7° cooler than the hottest core...

I applied paste with the "X" technic... but since it's 7° cooler, i don't care

I left prime blend running with ram @800mhz to see if I get any error, figured out that Linx uses a lot of ram and it might be my ram frequency or timings.

But im still not sure about 1.42v max for 24/7... 1.418v exactly, seems a bit high..

 

[Gus]

Looks like 4.2ghz with 1.37v is stable...

Still got a freeze in windows with 4.4 at 1.38 lol

This is lame.

Another freeze or bsod and I will just run it at stock.. im done with this.

 

[Aurus_OC]

My 2500K will do 4.7 at 1.4V for 2 hours with OCCT and Linpack enabled, so I started to fold at that overclock, today I come and what do I see? A BSOD of course. But hey, I am still thinking that even a 4.0Ghz overclock is great

.

 

[Gus]

4.2ghz and 1.36v: error after one hour of prime.... you gotta be kidding me...

I contacted Intel to see if I can try to get a RMA, don't care how, but I wanna change this garbage chip, the "k" is just useless in this case.

I really don't think this can come from the ram... as a still got errors at stock specs and with a bump in voltage

BUT one thing, this morning i ran 5hours blend without errors at 4.5ghz and 1.42v max...

This is a bit too much of voltage imo... But this sucker seems to need like 1.3 for stock lol