First Time Overclocking... i5 3570K / Corsair H80i

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Dayle McNeela

Dayle McNeela

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Jul 17, 2013
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Good Afternoon Tom'sHardware members!!

I have recently finished my £1,400 GBP build (first ever build) and want to get the best out of my money, so I want to overclock my Intel Core i5 3570K from stock (3.4GHz) to a fairly respectable 4.4GHz (stable with low-ish temps)

Specs; (below)

On the ASRock UEFI bios, in the 'OC Tweaker', it has options about;

BCLK? (100.0 - heard you can up this slightly and get a slightly better OC)

Spread Spectrum ?
Internal PPL Over-voltage?
Load-Line Calibration? (what is the best level 1-5?)
CPU PPL Voltage?
CPU Voltage - Fixed/Offset?

Please explain what these are, which settings I should play with to overclock, best load-line calibration level? Iv'e heard level 1 is good to stop vCore going up and down...

Also, should I used fixed or offset voltages?
Iv'e heard fixed is easier, but temps are higher (I have a liquid cooler so this wouldn't effect me much)
and offset is harder but better for temps?

Temperatures don't bother me as I have 4 large intakes and 2 large exhausts plus the liquid cooler...

Any help would be greatly appreciated :)
 
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mr1hm

mr1hm

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Jan 1, 2012
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spread spectrum: disabled (this can lead to CPU-z or other monitoring hardware to show your BCLK as 99.99MHz or 100.1MHz at times; so with it disabled, we can be assured the monitoring software are receiving the correct values).

internal PLL overvoltage: when lowering the voltage of this setting, some have reported cooler temperatures. the PLL stands for phase-locked loop or something along these lines if you wanted to read up on it.

load line calibration: this one you'll have to mess around with as every motherboard can be different but, it's main purpose to help in either reducing or raising the set voltage in BIOS.

cpu pll voltage: im pretty sure this is another setting that can help with temperatures (as reported by some) but, it's highly dependent on the chip and can have either an effect or no effect at all. also, i have heard of stability issues when this voltage is dropped too low.

cpu voltage: i recommend using a fixed voltage when testing your overclocks so that you know around how much voltage is necessary to be stable. when you find your final overclock you can set this to offset voltage and either give it a positive or negative value depending on if you need more or less voltage.

hope i helped some :)
 
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