Motherboard won't let my CPU go higher than 1.4v, but it does let me lower it.

Hello!

I want to BCLK overclock my secondary computer with a Phenom II x4 840 however the motherboard seems to limit me to 1.4v as the max "voltage ratio" I guess you could call it. Is there any way to get around it even if it requires a bios mod I would do it. I've tried flashing the most recent bios and even even rolled it back to see if it helped but nothing. I'm at 3.53Ghz so far and I know voltage is my limiting factor to going higher. ( i have a biostar a780l3l )

Thanks for reading :)
4 answers Last reply
More about motherboard cpu higher lower
  1. I overclocked two Phenom II computers.
    One overclocked to 3.99GHz, the other to only 3.45Ghz. Both of them had Vcore set to 1.42V. Both on identical ASUS motherboards.
    Going higher on the voltage on the slower one only allowed me to go 100Mhz faster, and produced a lot more heat. This is only a 3% speed increase!
    I suggest you stick to 3.53Ghz
  2. It's just for fun nothing more, my main PC has an 1800X with a TITAN XP hence why I'm not too worried about raising the voltage. I was simply wondering why it wouldn't let me raise it from the BIOS and AOD.
  3. Yeah, my old phenoms are now being used by my 80 year old parents....
    Some motherboards are limited on CPU voltage by the power phase design. For example, the PC in my signature has a max Vcore of 1.2V to protect the motherboard.
  4. lodders said:
    Yeah, my old phenoms are now being used by my 80 year old parents....
    Some motherboards are limited on CPU voltage by the power phase design. For example, the PC in my signature has a max Vcore of 1.2V to protect the motherboard.


    Yeah I realise that, I was just wondering if there is a way to bypass it such as a BIOS tweak/mod or maybe a jumper switch needs moving. I don't care much about the longetivity of the board nor do I think temps of the VRM matter to much as I do have a domestic house fan pointing directly in it with the H105 from Corsair I was testing before I place it in my main rig (waiting on an AM4 bracket). I would only probably take the chip to around 1.43-1.45 maximum anyway as I don't want to kill this thing although it won't be the end of the world if it does.
Ask a new question

Read More

Overclocking CPUs Motherboards