First time overclocking can someone explain this ?

[TaintedOne]

motherboard: Gigabyte z68xp-UD3P (rev 1.3 and latest BIOS update)
CPU: i5 2500k
RAM: 8gb Corsair Vengeance LP (the white 1.35v sticks)
PSU: corsair AX1200

I upped the Vcore and set the multiplier to 45 and get into windows start cpu z (1.61 64bit version) it correctly reports my overclock until I start realtemp(3.7) then cpu z reports stock 3.3GHz and a 33 multiplier ??? It took me a few days to figure it out cause sometimes cpu z was properly reporting my OC and sometimes it wasnt but starting realtemp does it everytime haha^^

Before I start realtemp:


After:


I'm still tweaking voltages any advise/tips for a first timer ? I did have it at 4.5GHz @ 1.36v but before trying to see if I could get the voltage down a touch i decided to take it up to 4.8GHz and now 4.5GHz isnt stable very long with the Vcore at 1.36 :(

[n0cturnal]

Try putting some load on it using prime95 or occt.

[Deleted]

Don't worry what software thinks your clock speed is, the BIOS is the authoritative source. I've noticed that many programs do not correctly detect the actual settings.

Sandy Bridge / Ivy Bridge may require an increase in Vmcio / Vtt from 1.0V to 1.1V or even 1.2V to ensure stability

[TaintedOne]

Don't worry what software thinks your clock speed is, the BIOS is the authoritative source. I've noticed that many programs do not correctly detect the actual settings.

Glad you said this I nearly forgot in the BIOS (if you are familiar with gigabytes BIOS) there is a "system status" tab and it shows the turbo clock at 4.5GHz and base of 3.3GHz but I have turbo disabled ? seems odd to me anyway for awhile I thought that was the problem with what cpu z was reporting until I noticed realtemp was the cause.

---------- Post added 2012-08-11 at 07:58 PM ----------

Try putting some load on it using prime95 or occt.

tried putting load on it after I start realtemp. cpu z will report nothing else but the stock clocks after I start realtemp until I restart the computer.

[unclewebb]

RealTemp has a Disable Turbo feature that laptop owners like to use to control the heat of their laptops. Have a look in the RealTemp Settings window and make sure that is NOT checked and Turbo Boost will probably start working correctly for you again.