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Keep trolling m4chine.
cant understand why you guys are having so much trouble with clocking this i got i5 2500k overclocked at 4.5ghz straight out of box just changed multiplier no vcore settings just everything on auto ??? i did buy a artic cooling freezer 13 cooler. my cpu never passes 40c under full load prime 95 running 2hrs so i guess my choice of buying a none stock cooler was right looking at the temps some of you guys are getting just waiting for some mosfet cooling blocks then i am going to try for 4.8ghz pitty that asus leave them off the cheaper boards but pretty impressed so far
What are your voltages, Idle and Load, can't be good if the offset it set to auto.
It can be quite tricky getting the offsets right, what I would advise you to do is start of by setting the offset to either -0.005 or +0.005, with whatever multiplier you have chosen, if you can't choose the LLC level, then leave it disabled until you start overclocking to 4.5GHz+.
As an example, you set the multiplier to 44x, offset to +0.005V
Once you boot into windows, open cpu-z and open IBT, set it to max ram and click start, keep an eye on cpu-z to see what your load voltage peaks up to, lets say it was 1.27V, now if you system is unstable or crashes under load (BSOD 101/124/etc), it means your vcore is too low, you will have to check the BSOD error code to be sure. Now to increase your vcore, you just add however much more voltage you want to your peak voltage, so if you got a peak of 1.27V, and you want 1.30V, just add 0.030V to your original offset of +0.005V, so your new offset will be +0.035.
Add in small increments to determine your stable voltage, same applies to a negative offset, start with -0.005V, if stable, drop the voltage by another 0.005V, with a a negative offset, you may get too low a voltage at idle, which can cause your system to crash, so keep an eye out for your idle voltages too.
If your system blue screens whilst booting into windows, your offset it too low, increase same way till it boots....
If you need more help let me know.
I realize this is relatively old thread but it's one of the very few discussions I've found in regards to the ASUS P8Z68-V LX on the web. As there aren't too many owners with this board, information is scarce. Everything I've learned has been from my own experiences or other people's experiences that I have read about.
Most ASUS P8Z68 owners don't realize -V LX/LE have some of the OC BIOS featured locked when compared to their bigger brothers. (most notably Manual Vcore adjustments/LLC settings besides enabled/disabled/auto.) This has led to some inaccurate suggestions by these owners.
The settings -V LX owners do have access to is really all you need for moderate overclocks. I will try to address a few of these settings hopefully someone will find this information somewhat useful.
Overclocking with this board is as easy or easier as the other ASUS Z68 boards. Basically keep BCLK at 100.00 and change the multiplier.
VCORE adjustment might be the only setting that may seem troublesome to use. As I've touched on in the beginning, we're only given "Offset mode." Manual vcore adjustment would make the overclocking experience faster but Offset is the superior option. I'd be more upset if this board didn't have Offset adjustments.
To get your vcore at what you want it to be is relatively easy. These are the steps I take to determine my offset.
- Determine Turbo Multiplier (I started off at 40X which would give me 4 Ghz)
- Set vcore offset to - 0.005 and boot into windows. (Left everything else auto)
- Open CPU-Z and a stability tester of your choice (prime95/LinX/IBT)
- I did a Blend in Prime95 to simulate CPU 100% load.
- Check CPU-Z voltage and that is the vcore your CPU wants to boot @ 40X INCLUDING OFFSET the -0.005 (so if you're at 1.216 your board wants to boot at 1.221 w/o offset)
- After determining the vcore your CPU wants to boot at, adjust the Offset to what your vcore to be. (ex. 1.216 + -0.050 offset = 1.166V)
- It will not give the same vcore at a different multi say 42X, usually it will be more vcore so adjust accordingly!
**NOTE: AUTO does not equal 0.000 offset, AUTO setting is best used with stock and should not be used to determine offset. Essentially -0.005/+0.005 is the closest thing to AUTO if you're trying to overclock.
I prefer to start low and work my up when overclocking. As I want the lowest vcore w/ the highest OC. For my current OC I actually opted for the highest OC at stock vcore.
Other settings:
Load Line Calibration - still highly debated as to the benfits/risks of this setting across ALL MOTHERBOARDS. We only have 3 options AUTO/ENABLE/DISABLE, while others will have Low/Medium/Normal/High/Extreme etc.
**NOTE: This setting will affect your offset somewhat. With it enabeled your vcore at -0.005 will be higher than it is disabled.
ex. 41X w/ LLC DISABLED = 1.216V
41X w/ LLC ENABELED = 1.316V
- I have it at Disable, as my overclock is still very moderate. If you're trying to reach an overclock of 45X+ I'd consider enabling it if you have a hard time trying to get stable. If I had to guess Enable would be equivalent to Normal in a fully unlocked bios but, that is just a hunch as I haven't found any documentation on this for the -V LX.
PLL Overvoltage - Disable
Speedstep/C1E - Enable
EVERYTHING ELSE I LEFT AT AUTO/DEFAULT
Hope this was of use to someone.
I've included my moderate OC for comparison.
13+ hrs Prime95 stable, Custom Blend w/ 90% ram usage