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2500K with MSI Z68A(G3)

Last response: in Overclocking
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a b à CPUs
a b K Overclocking
February 27, 2012 10:24:19 AM

I have been doing modest overclocks now and I have found that MSI is a bit limited on features, namely no LLC or Offset voltages. That said I am aiming for a stable 24/7 3.8Ghz overclock;

CPU BCLK - 100000
CPU Ratio - 33
ADJUST CPU RATIO IN OS - Disabled
Internal PLL Overvoltage - Disabled
EIST - Enabled
Turboboost - Enabled
DRAM frequency - 1600mhz
XMP - Disabled
DRAM Timing - Link
ADV DRAM Config (Set to Gskill Snipers specifications)
Spreadspectrum - Disabled
VDroop Control - Low VDroop
CPU Core Voltage - Auto
CPU I/O Voltage -Auto
DRAM Voltage - 1.505v
GPU Voltage - Auto
System Agent - Auto
CPU PLL Voltage - 1.8v
PCH - Auto
Limit CPUID Maximum - Disabled
Execute Disable Bit -Enabled
Intel Virtualization Tech - Enabled
Power Tech - Custom
C1E - Disabled
Overspeed Protection - Disabled
Intel C State - Enabled
Intel C State Limit - C2
Long duration power limit - 200w
long duration maintained - 1000ms
Short Duration - 250w
Primary plane turbo power limit - 0
secondary - 0

Core ratio limit 38/38/38/38

EUP 2013 - Disabled
CPU phase Control - Intel SVID mode
MOBO LED - Auto
C1E Support - Disabled
Intel C State - Enabled
Package C State limit - C2

I will be running Prime95, SuperPi, Memtest to determine stability, the voltages did concern me as a bit low, 0.77~0.97 on idle and 1.000~1.150 at load. What am I doing wrong?

More about : 2500k msi z68a

a b K Overclocking
February 27, 2012 10:27:44 PM

sarinaide said:
I have been doing modest overclocks now and I have found that MSI is a bit limited on features, namely no LLC or Offset voltages. That said I am aiming for a stable 24/7 3.8Ghz overclock;

CPU BCLK - 100000
CPU Ratio - 33
ADJUST CPU RATIO IN OS - Disabled
Internal PLL Overvoltage - Disabled
EIST - Enabled
Turboboost - Enabled
DRAM frequency - 1600mhz
XMP - Disabled
DRAM Timing - Link
ADV DRAM Config (Set to Gskill Snipers specifications)
Spreadspectrum - Disabled
VDroop Control - Low VDroop
CPU Core Voltage - Auto
CPU I/O Voltage -Auto
DRAM Voltage - 1.505v
GPU Voltage - Auto
System Agent - Auto
CPU PLL Voltage - 1.8v
PCH - Auto
Limit CPUID Maximum - Disabled
Execute Disable Bit -Enabled
Intel Virtualization Tech - Enabled
Power Tech - Custom
C1E - Disabled
Overspeed Protection - Disabled
Intel C State - Enabled
Intel C State Limit - C2
Long duration power limit - 200w
long duration maintained - 1000ms
Short Duration - 250w
Primary plane turbo power limit - 0
secondary - 0

Core ratio limit 38/38/38/38

EUP 2013 - Disabled
CPU phase Control - Intel SVID mode
MOBO LED - Auto
C1E Support - Disabled
Intel C State - Enabled
Package C State limit - C2

I will be running Prime95, SuperPi, Memtest to determine stability, the voltages did concern me as a bit low, 0.77~0.97 on idle and 1.000~1.150 at load. What am I doing wrong?



Run prime95 for about 8 hrs but monitor the core temps and what cpu cooler are you using? Download and run CPU-Z and HW Monitor, Run prime95 and also run CPU-Z and HW Monitor, the temps should not go over 75 deg Celsius if the whole system is stable for 8 hrs without BSOD, then you are good.
a b à CPUs
a b K Overclocking
February 28, 2012 3:58:05 AM

I was tweaking a bit yesterday, I reduced the PLL voltage from 1.8v standard to 1.7v, I also tested TB overclocking and found that it goes up to 4.4 stable at the same 1.344~1.367 vcore as if you do 3.8ghz. I then also tried a multiplier overclock turning off TB and the voltages were a little more pleasing. In general idle was around 0.960~1.160 and Load had a 1.1~1.360 fluctuation(Overclock to 3.8ghz on multiplier).

I have run IntelBurnTest with stability, highest core temp hit 78 at 100% stress on a Zalmans CNPS 11X, average temps were 55~63. I did do about a hour stable on Prime95.
a b à CPUs
a b K Overclocking
February 28, 2012 4:32:24 AM

As with my experiences with MSI(formally gigabyte) the MSI boards are very limited in overclocking functionality, the most notable is the FSB glitch with the bus only at 99.7 instead of 100. The other is the absence of LoadLineCalibration and Offset voltage which would be very handy. The board tends to use the standard 1.376 odd vcore for load voltages whether it is 3.8ghz or 4.5ghz, manual vcore adjustments are not a good option with the absence of offset features, if you manually lock your vcore you have higher idle vcore than load which I am still confused about.
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