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Cant overclock i5 2500K

Last response: in Overclocking
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February 28, 2011 1:28:18 PM

Hello,

Sys spec:

MSI P67a GD65 mobo
i5 2500K
4GB 1600MHz XMS3 ram
2x GTX 470 SLI
Novatech 750Watt SLi ready modular PSU


Having trouble overclocking this chip.

Tried loads of different settings but cant seem to get stable on any of em.

Even the OC Genie button get the overclock to 4.2GHz but its not stable.

Dont think its the ram, im not touching the BLCK so ram should be ok?

Im quite new to overclocking anyway but this jus seems beyond me...? A decent guide would help but cant find one!

Should i only need to be adjusting Vcore and leave everything else on auto....thats what ive seen on some guides n they hit 4.5GHz no prob?

Ive tried giving everything more voltage but cant get it steady at all?

even@ 4GHz on auto its unstable....ive been told to use this as a starting point but cant even get that far.

Im startin to think i could be pushing the PSU too far...?

More about : overclock 2500k

March 2, 2011 1:54:32 PM

smoggy12345 said:
Hello,

Sys spec:

MSI P67a GD65 mobo
i5 2500K
4GB 1600MHz XMS3 ram
2x GTX 470 SLI
Novatech 750Watt SLi ready modular PSU


Having trouble overclocking this chip.

Tried loads of different settings but cant seem to get stable on any of em.

Even the OC Genie button get the overclock to 4.2GHz but its not stable.

Dont think its the ram, im not touching the BLCK so ram should be ok?

Im quite new to overclocking anyway but this jus seems beyond me...? A decent guide would help but cant find one!

Should i only need to be adjusting Vcore and leave everything else on auto....thats what ive seen on some guides n they hit 4.5GHz no prob?

Ive tried giving everything more voltage but cant get it steady at all?

even@ 4GHz on auto its unstable....ive been told to use this as a starting point but cant even get that far.

Im startin to think i could be pushing the PSU too far...?


OK, check my rig, I have a similar one to you.

What kind of cooler do you have? (just asking because a good cooler is necessary for high overclocks on this CPU)

1 - Turn off Turbo mode.
2 - Set base multiplier to 42 (lets try for 4.2Ghz)
3 - VCore (for 4.2 - give it 1.25Volts)
4 - CPU I/O - I set mine to 1.15 (lower later)
5 - System Agent - I set mine to 1.2 (lower later)
6 - EIST - disabled
7 - In the BIOS main menu screen there are 5 buttons (the middle button is overclocking). The far left button is green and says about power saving. There are two options on that list, set the first option to "disabled".

Save and exit

Run Prime95 with latest versions of CPUz and ReaLTEMP (LATEST VERSION IS ESSENTIAL)
March 2, 2011 1:57:00 PM

Also check the setting for "internal PLL overvoltage" is enabled.

The figures I have given for voltages are quite high, you can lower them later if you achieve stability.
Related resources
March 2, 2011 6:41:27 PM

btw in the guide above, i have the same mobo, the GD65.
!