Need help overclocking 2500k on asus p8 z68-m pro mb (screenshots)...

Quote:

Originally Posted by Aleckazee 

I've read a few overclocking guides but non of them seem to be a lot of help when it comes to my motherboard. I don't seem to be able to set a manual vcore (just offset), which I wouldn't mind if I knew how to manually overclock my cpu. I multi to 45 with offset vcore of 0.085, it booted into windows but according to cpuid it still ran under stock speeds when running IBT on high.
Here are screenshots of my BIOS:

How do I manually oc? Can someone set me on the right path here
The highest auto oc I could get was 4.3GHz

Hi Aleckazee!

Set these settings and then let's see where it goes:

• Ai Tweaker > Ai Overclock Tuner:  Manual
• Ai Tweaker > BCLK/PEG Frequency: 100.0
• Ai Tweaker > Turbo Ratio:  By All Cores
• Ai Tweaker > By ALL Cores (Can Adjust in OS): 45
• Ai Tweaker > Internal PLL Overvoltage:  Disabled
• Ai Tweaker > Memory Frequency:  manually select your memory's stock speed
• Ai Tweaker > EPU Power Saving Mode:  Disabled
• Ai Tweaker\ CPU Power Management > CPU Ratio:  Auto
• Ai Tweaker\ CPU Power Management > Enhanced Intel SpeedStep Technology:  Enabled
• Ai Tweaker\ CPU Power Management > Turbo Mode:  Enabled
• Ai Tweaker\ CPU Power Management > Everything else on Auto
• Ai Tweaker > CPU Offset Mode Sign:  +
• Ai Tweaker > CPU Voltage:  let's go with 0.005V for now.  We will increase it in 0.005V increments as needed (if needed)
• Ai Tweaker > iGPU Offset Mode Sign:  +
• Ai Tweaker > iGPU Voltage:  Auto
• Ai Tweaker > DRAM Voltage:  Auto is ok, but it can also be beneficial to manually enter your memory's stock voltage
• Ai Tweaker > VCCIO Voltage:  Auto
• Ai Tweaker > CPU PLL Voltage:  Auto
• Ai Tweaker > PCH Voltage:  Auto
• Ai Tweaker > Load-Line Calibration:  Enabled
• Ai Tweaker > Spread Spectrum:  Disabled (it's normally recommended to enable this, but then the P8Z68 boards show a BCLK of about 99 MHz in CPU-Z)
• Advanced\ CPU Configuration > CPU Ratio:  Auto
• Advanced\ CPU Configuration > Intel Adaptive Thermal Monitor:  Enabled
• Advanced\ CPU Configuration > Active Processor Cores:  All
• Advanced\ CPU Configuration > Limit CPUID Maximum:  Disabled
• Advanced\ CPU Configuration > Execute Disable Bit:  Enabled
• Advanced\ CPU Configuration > Intel Virtualization Technology:  Disabled
• Advanced\ CPU Configuration > Enhanced Intel SpeedStep Technology:  Enabled
• Advanced\ CPU Configuration > Turbo Mode:  Enabled
• Advanced\ CPU Configuration > CPU C1E:  Enabled
• Advanced\ CPU Configuration > CPU C3 Report:  Disabled
• Advanced\ CPU Configuration > CPU C6 Report:  Disabled

If this allows you to boot into Windows, then can you tell me what the core voltage is under full load with these settings?

Thank you, Aleckazee!

Quote:

Originally Posted by Aleckazee 

All went well, cpuid reports 1.384v

On a side note, under Ai Tweaker, I didn't have any options for iGPU Offset Mode Sign or iGPU Voltage. I'm sure this is not important in this situation but I thought I would mention it. My guess is that the GPU Boost Switch is turned off on my mb and that's why it's not showing up but I'm not sure

Oh wow, this is awesome!  Now, if you want to lower that voltage in order to see the lowest voltage that 4.5 GHz needs, then switch the Offset Mode Sign to a minus, and leave the offset voltage at 0.005 (so then it would change from +0.005V to -0.005V).  At that point, you can keep decreasing it in -0.005 increments by entering 0.010, 0.015, 0.020, 0.025, etc.  With the Offset Mode Sign set to the minus sign, this will drop the voltage more and more with each 0.005 increment adjustment that you make.

Also, I learned something about this motherboard a few days ago.  If you were to leave the Offset Mode Sign as a plus sign and leave the offset voltage at +0.005 and only increase the Turbo Ratio (the "By All cores (Can Adjust in OS)" setting) from 46, to 47, to 48, etc., then the voltage will increase as well.  So this is another reason to switch the Offset Mode Sign to a minus now.  This will enable you to raise the Turbo Ratio beyond 45 while continuing to experiment with different negative offset voltages so that the voltage doesn't continue going higher and higher.  It's already higher than 4.5 GHz should need, but it's still very safe!

So what you can do is find the lowest necessary voltage for 4.5 GHz in order to be fully stable, and then switch to 4.6 GHz and then see what happens to the voltage.  It might increase just enough by itself (as I described above) in order to stay stable.  Or, it may need a a higher core voltage.  So for example, let's say you find that you need -0.025 for 4.5 GHz, and then let's say that you increase to 4.6 GHz and it's not stable.  So then you'd switch to -0.020V and try again, or 0.015V if it's still not stable, etc. because that will increase the core voltage by shrinking the negative integer.

In other words, I'm very glad that this is working so far!  Although, I'm not surprised because this isn't a bad motherboard at all.  :)

Anyway, I am glad you mentioned this GPU Boost Switch:  I didn't know about it!  That has to be why there are no iGPU options in there.  Nice.  Less stuff in the way. hehe

Thank you for the update, Aleckazee!  I wish you great success in finding the lowest necessary voltage for 4.5 GHz!  After that, we can maybe to go 4.6, 4.7, or maybe even 4.8 GHz. 

Quote:

Originally Posted by Aleckazee 


So I went to 46, but core 0 was only chugging away at about 25%, does that mean I need more voltage? I had it set at +0.005 offset. Should I change it to +0.010 and see if it goes under load? My voltage requirements seem a bit higher than everyone elses

I'm not really able to stay awake much longer, but yeah switch to +0.010V and then post what the new full-load core voltage is.  I'm curious.  :)

Quote:

Originally Posted by Aleckazee 


Got 1.39b 2v but core 0 is still only running at about 50%

What do you mean by 50% anyway?  I admit that I don't understand yet.

1.392V isn't bad, though.  I was afraid that it might jump higher than that.  :)

Also, testing the 1792K and 1344K FFTs is good, but there are about 84 FFT sizes in Prime95 27.7 build 2 that run during the Blend test (which take about 14 hours to get through all 84 once).  If you do the Custom Blend test, then you can do all 84 of those FFT sizes with more memory utilized than just 1600 MB.  I recommend setting it to use about 95% of it.

Another cool thing you can do is check the log to see exactly which FFT sizes you're failing.  This is when you can focus on one FFT size at a time.  The most common FFTs to fail are 1792 and 1344, so that's why it's recommended to do those, but there may be others that are common for you.

Edit:  I have to get to sleep.  I apologize for cutting it short, but I am confident that you got this.  :)  I'll be back sometime tomorrow.  It could be roughly 6 or 8 hours from now, or it could be 18 hours from now.  I'm not sure.  I think it's more likely that it'll be 18 hours from now or perhaps 19-20.