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Thread: z77 oc formula psu

  1. #1
    Join Date
    Oct 2012

    Default z77 oc formula psu

    I have a seasonic M12II 750w 80+ bronze....the OC Formula has an 8pin and 4pin 12v connector.
    My PSU comes with 1x EPS12v/ATX12v (8/4) pin connector and 1x EPS12v 8 pin connector.

    1.Could I just use the 8pin?
    2.Do I need it(4pin connector) when im only doing some mild OC(5ghz)
    3.EPS12v(8pin) = ATX12v(2 x 4pin)?? Do I need a new PSU to utilize the 4pin 12v?

    I will definitely buy a new PSU if i want to go extreme.

  2. #2
    profJim's Avatar
    profJim is offline Chief Munchkin + moderator
    Join Date
    Dec 2008
    Tacoma, WA. [USA]

    Default Re: z77 oc formula psu

    Your psu is fine for your needs as long as you're not using an extreme multi video card setup.
    Use the 8-pin EPS12v psu power cable in the motherboard's 8-pin connector.
    Check you're motherboard user manual to see under what conditions you might need to also use a 4-pin ATX_12v cable.
    Some motherboards also have an additional 4-pin molex connector that should be used with a a multi video card setup.

    If a 5.0GHz overclock is mild, how much higher do you have to go for a wild overclock?
    Last edited by profJim; 10-18-2012 at 10:12 PM. Reason: spelling
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  3. #3
    synack's Avatar
    synack is offline Member
    Join Date
    Oct 2012
    Ontario, Canada

    Default Re: z77 oc formula psu

    On the z77oc formula, the SLI/Crossfire power connector is a 4 pin molex (hard drive type connector).

    The manual suggests that you connect to both the 8pin AND the 4 pin ATX power connectors.
    You have the power and connectors from the PSU.. why not? The worst that could happen is more stable power.

    5Ghz is not mild btw lol... that is the max this board recommends without switching to LN2 cooling. I doubt if you would even reach 5GHz stable with water cooling. Maybe SS cooling...
    Good luck and have fun! Its a great board!


  4. #4
    parsec's Avatar
    parsec is offline Senior Member
    Join Date
    Jun 2012
    Third stone from the sun

    Default Re: z77 oc formula psu

    All the advice above is great, and your PS should suffice, short of a dual video card setup. Going above 5GHz with an IB or SB CPU will require an extra good chip and the best cooling possible. Also, IB does not OC better than SB, actually a bit worse, due to heat issues.

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