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Overclocking i5 2500k on Asus P8Z77-V LK - Page 2

post #11 of 18
As long as it is stable, you don't need to change anything else. If you want to shoot for a higher overclock (above 4.5) then some of the settings become more important. But for now, if it works, enjoy.
post #12 of 18
Thread Starter 
Thanks guys. I've got another question.

At -0.060 offset I get these voltages:

boot 1.248v
prime95 1.192 - 1.200v

0.888v @ 1.6Ghz (idle)
1.240v during BF3
1.240v during CSGO

So why does the voltage go up to 1.240 while gaming when the processor is not even at full load. It would make sense if the voltage was 1.240 during prime95 since all the cores are at 100%. I am a little confused here.

What settings do I need to change so that my max voltage will not exceed 1.200 (like in prime95). So for instance, when I am gaming, even though the cpu is not at full load, the voltage should not exceed 1.200v.
Edited by demzie - 10/17/12 at 9:23am
post #13 of 18
The reason is Vdroop. When the CPU is under a heavy load (like Prime95) it draws more current, and that causes the voltage to drop a little bit. When the CPU is at a high frequency but not actually heavily loaded (like a game) there is less current draw and so the voltage stays higher. So it isn't the voltage going up in games, it is that the voltage is going down in Prime95.

Loadline calibration (LLC) is designed to fix this, by increasing the voltage when the current draw is high. If you want to level out your voltage, you need to increase the setting you have for LLC in the BIOS.

Be advised, though, that increasing LLC will keep the voltage from dropping so far in Prime95, but it won't reduce the voltage you see in games. To do that you'll need to change your offset.
post #14 of 18
Quote:
Originally Posted by Forceman View Post

The reason is Vdroop. When the CPU is under a heavy load (like Prime95) it draws more current, and that causes the voltage to drop a little bit. When the CPU is at a high frequency but not actually heavily loaded (like a game) there is less current draw and so the voltage stays higher. So it isn't the voltage going up in games, it is that the voltage is going down in Prime95.
Loadline calibration (LLC) is designed to fix this, by increasing the voltage when the current draw is high. If you want to level out your voltage, you need to increase the setting you have for LLC in the BIOS.
Be advised, though, that increasing LLC will keep the voltage from dropping so far in Prime95, but it won't reduce the voltage you see in games. To do that you'll need to change your offset.

Well put mate. +rep
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TheSadFlute
(16 items)
 
DyingHeart
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CPUMotherboardGraphicsRAM
i7-6700K TUF Sabertooth MSI 1080 Ti 16GB 2400MHz C15 
Hard DriveHard DriveHard DriveCooling
Corsair 480GB LE 3TB WD Green Sammy 500GB 850 EVO H100i 
OSMonitorKeyboardPower
Windows 7 Pro  BenQ XR3501 Logitech G710+ EVGA G2 750W 
CaseMouseAudioAudio
Cooler Master Stryker Logitech G602 Asus Strix Nakamichi 5.1 
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G.Skill Phoenix Pro 120GB WD 2TB Green Stock 3x120mm UQ fans 
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post #15 of 18
Thread Starter 
Thanks forceman. So I have been playing around with my BIOS settings. I have set the LLC to Ultra High and offset to -0.130 and worked my way down to -0.100 since my PC would randomly reboot only while gaming. Not while idling or stress testing (although I did not stress for too long). Currently, I have my offset set to -0.090 and I get 1.240v during prime95 and 1.232V during CSGO. Is this voltage too high for a 4.2Ghz OC? on an i5 2500k?
post #16 of 18
That sounds like a decent enough voltage for 4.2. You might try a lower setting for LLC - if LLC is set too high with offset you'll end up setting too low an offset (because LLC is helping out when you stress test) and you'll get crashes when the system is more lightly loaded (like in games) because LLC isn't correcting as much (which results in too low a Vcore). In other words, at higher settings of LLC it actually adds voltage instead of just countering Vdroop. You can try testing with just a single thread of Prime95 and see what happens - that'll help replicate the gaming experience.
post #17 of 18
Thread Starter 
Thanks once again. So I have the following settings so far and it seems stable but I do get random BSOD 124 while playing CSGO.

CPU capability 120% (max on my mobo)
phase & duty: extreme
frequency: 350
LLC: high
offset -0.095

boot 1.224v
prime95 1.216v
0.856 @ idle
1.208 in bf3
1.208 in csgo

I changed the offset now to -0.090. I've read in another thread regarding BSOD 124: "If you are using offset mode for voltage, you must disable the C3 and C6 report." I have also heard that this effects the performance of SSD drives. Is this correct? I am hoping that decreasing the offset which will subsequently increase the voltage will be a fix to this random BSOD while gaming. Please correct me if I am wrong and thank you once again for your great help! smile.gif
post #18 of 18
I don't know that you must disable C3 and C6, but it does cause trouble for some people (because of the affect it has on idle voltages) so you can certainly give it a try and see if it helps. It also can affect SSD performance, but I don't know if that is in a noticeable real-world way.

Those other settings look fine.
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