I5 2500k - Gigabyte Z68XP-UD3P Overclocking

This is mine set to 4.5ghz... 116 gflops according to burn test...

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First off great thread Neil! im looking at getting my i5 soon with this board or the cheaper Z68-AP and i was just curious to know how the offset voltage works to get the great overclock you have on your chip? I am kind of new to this and have never used off set before as i dont really have these features on my current board and i would love to try and get the clocks you guys have posted in this thread
 
No cold boot's at all today...

liamcrane said:
First off great thread Neil! im looking at getting my i5 soon with this board or the cheaper Z68-AP and i was just curious to know how the offset voltage works to get the great overclock you have on your chip? I am kind of new to this and have never used off set before as i dont really have these features on my current board and i would love to try and get the clocks you guys have posted in this thread
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I don't use offset I use Load Line calibration instead which helps with vdroop, offset is good if you want the volts as well as the core speed to drop when idle then raise when it's needed
 
Cool cheers for that neil, what setting do you have LLC set to? I have LLC enabled on my board think im set at 19% but im not sure if LLC is different between amd and intel.

I take it your voltage does not drop at all then if its a set voltage or do you leave it set to auto and let it fluctuate?
 
On my board I've set level 6, some may try level 5 depends how much vdroop you get and if the voltage goes up too much with a higher level. My voltage never drops below 1.380 it only raises slightly if under extreme load.
 
Just a bit of information. I'm now getting 121Gflops at 4.5ghz. I was mistaken and I have the Z68XP-UD3, and when I was hitting the BSOD trying to find the sweet spot, it would cause the bios to revert all settings back to default and the pc would cold start repeatedly. I've flashed the bios to F8, and when hitting bsod during voltage hunting, the settings don't get wiped and I don't seem to be suffering from cold starts anymore. Probably not much help for you guys that have the UD3P, but might help others that only have the UD3.

Certainly going to look at a water cooling setup now, my H50 is struggling during the linpack testing.
 
Could i have a bit of help here please... Lots of this is all new to me, so hopefully a few quick changes might sort me out. My setup is:

i5 2500K
GA-Z68xp-UD3p
Noctua D14 Fan
Corsair Dominator 8Gb

currently got it sitting at 4.5Ghz and its nice and stable.

Idles at around 36c
Load at 68-70c Using Prime 95

Where my concerns lie, is when looking at CPU-Z it shows my Vcore at 1.404v

Looking at others overclocks, it would appear my vcore is pretty high. I have brought it down to where it will remain stable. Any lower and BSOD.

other settings are:

CPU Clock 45
System Mem Multiplier 1600
CPU PLL Overvoltage - Enabled
Turbo Boost - Disabled
Multi-Steps Load Line - Level 5
CPU Vcore 1.385
QPI/VTT 1.270
CPU PLL 1.810
DRAM Voltage - 1.510

If i use the settings as per the first post, it will BSOD at 4.5ghz.

What is my best course of action to get the Vcore down to a more reasonable level?

Many thanks
 
Your VTT is way to high, only needs to be about 1.2 max it may go beyond 1.3v when having load put on it with your setting, your CPU PLL might be better at 1.750. Your CPU V.CORE would be better being lower as you have a LEVEL 5 load line which means if you use intel burn test it may well go beyond 1.4v. As for the BSOD at 4.5 I don't know why, i'm stable at 4.7
 
I wouldn't worry to much if your temps are ok. Every chip is different and some require a little bit more voltage. Intel say the max is 1.52V so you are well within safe tolerances..

Mine is hitting 77.c with cpu-z showing 1.4V under burn test and it's perfectly stable.

Edit - What he said above... Yeah......:D
 
Ok, so i'll do the following:

Lower the VVT to 1.2
Lower the PLL to 1.750
Lower the VCore to (ill go lower and see what happens)

Question i have, is where does the Load line do in conjuction with the settings i will make? Would increasing/decreasing make things better?

Also, wazza300 mentioned dvid or ofset or Fixed Voltage.. Touch BIOS shows Dynamic Vcore (DVID) to Auto
 
Touch BIOS shows Dynamic Vcore (DVID) to Auto, then you are using load line calibration and not offset mode :D

The higher the level of load line calibration the less change of having vdroop ( volts dropping under load ) but too high and it will go the other way. Volts going too high under load. Try it with a lower voltage core then run intel burn test while using cpuz and see what the volts get to.
 
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