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Need Help Overclocking i5 2500k

Last response: in Overclocking
September 25, 2012 12:45:14 AM

I currently own an MSI z68 GD-65 mobo, with an i5 2500k cpu. I recently installed a fresh copy of windows 7 ultimate and updated all drivers including bios to the latest available. I had my pc overclocked before this at 4.4 (dont remember the voltage), but now I have it at 4.2 because I have the voltage setting in bios at 1.37 for a stable clock which I feel is very high.

My current setup

CPU core voltage = 1.37
vdroop = 75%

Internal PLL overvoltage = enabled
EIST = disabled
Enhanced turbo = disabled
OC Genie button operation = enabled
DRAM frequency = auto
Memory fast boot = enabled
spread spectrum = disabled
system agent voltage (SA) = auto
Limit CPUID maximum = disabled
execute disable bit = enabled
intel virtualization tech = enabled
power technology = custom
C1E support = disabled
overspeed protection = disabled
Intel C state = disabled
primary plane current = 1024
secondary plane current = 32
EuP 2013 = disabled
CPU phase control = disabled

The new bios now has percentages for vdroop instead of the normal low or auto. I have it at 75% but not sure if I want that percentage higher or lower.

Also when I look at CPU-Z it shows my voltage at 1.320-1.328 idle and 1.232-1.240 during load. The bios shows the same numbers but are no where close to what I have it set at. Is this normal?


More about : overclocking 2500k

a c 78 à CPUs
a b K Overclocking
September 25, 2012 12:53:32 AM

That's some serious vdroop.

Whatever LLC setting you are using is not having the desired effect. Try 0% and then 100% just so you know what the values translate to.

I would also lower your vcore in general though.
September 25, 2012 1:20:07 AM

found a new stable setting.

using 1.35v, 100% vdroop for 4.2

Still don't like what I am seeing.

CPU-Z idle = 1.304 - 1.312, load = 1.232 - 1.240

vdroop offset control would be the same as load line calibration right? want to make sure im not missing a setting somewhere.
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a c 78 à CPUs
a b K Overclocking
September 25, 2012 1:30:54 AM

Vdroop should = LLC, it just seems really weak.

Have you tried 0% ?
September 25, 2012 1:35:39 AM

The bios doesn't have 0% only 12.5% then it goes to auto. I tried 12.5% but the system crashes during prime95 run, same as auto.
a c 78 à CPUs
a b K Overclocking
September 25, 2012 1:47:06 AM

Then 100% it is.
October 26, 2012 9:27:46 PM

i5-2500K - P67 Overclocking

ASUS P8P67 WS Revolution B3 (nf200)

* hit multiplier to 44
* disable turbo boost
* disable speed spectrum
(some motherboards will disable turbo when speed spectrum is disabled)
* LLC - regular or medium (x45 and below)
* Phase Control - optimized
* enable internal PPL overvoltage
* enable execute disable bit
* enable Intel Virtualization Tech
* disable CPUID Maximum
* disable overspeed protection
* CPU @ 120%
* CPU voltage - offset mode (-0.015)
* long and short duration times, set them both to 150...
* make sure power saving features are enabled:
* set hardware monitor | fans no less than 62.5%
* save and exit
* boot into windows

default voltage levels with multi up to x43: 1.24-1.26V
multi x44 up to x47 voltage: 1.30 - 1.375v

LLC - load line calibration
x45 = medium / x49 = high

CPU temp: idle @ 30C (package) / load @ 61C
CPU cooling: CM TX3 with dual 92mm fans (push/pull)

tweaked my 2500K unit....