[PSU] Does Gold/Bronze/etc certification matter?

I don't know much about buying PSUs but from a lot of builds I read, people seem happy with regular 80 Plus or Bronze certification? Does this really matter that much?

I'm also confused because I'm seeing for instance, the SeaSonic G Series (http://www.newegg.com/Product/Product.aspx?Item=N82E16817151119&Tpk=seasonic%20g%20series) is 550W and 80 PLUS GOLD cert for $70, yet the SeaSonic M12II 520 (http://www.newegg.com/Product/Product.aspx?Item=N82E16817151093) is 520W and 80 PLUS BRONZE but the same price?

I was thinking about going for the G Series to be safe since PCPARTPICKER estimates about 326W for my build (below), but I'm just wondering, why are they the same price???


My build
CPU: i5-3570K | CPU Cooler: CM Hyper 212 Evo | Mobo: Asus P8Z77-V PRO | RAM: G.Skill Sniper 8GB (2x4GB) | Storage: WD Caviar Blue 1TB | GPU: Gigabyte GTX660
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More about gold bronze certification matter
  1. Whether the level of certification matters depends if you care about the energy being saved. The difference between Bronze and Gold is something like 5%, so most don't pay the premium to get the slightly better efficiency.

    Pricings are probably not representative of actual values right now, still in the middle of Black Friday.
    I suspect the G-Series is a lower binned (ie quality) unit than the MS12 series. So it costs less despite the better efficiency.

    EDIT: You definitely want a unit that is atleast 80+ certified. As the certification covers more than just efficiency of converting AC to DC current. It also covers how strict the voltage control on the rails are, 80+ spec states that it has to be within 5% of its rated voltage. If it strays outside this it can lead to the degradation of components.
  2. The PSU certifications do matter if you are energy conscious. Anything 80plus certified is a GOOD product to start with.

    Power drawn from the wall:

    Platinum - 271.7 W
    Gold - 277.8 W
    Silver - 294.1 W
    Bronze - 304.9 W
    Basic - 312.5 W

    So Basically :

    GOLD - Very Energy Efficient
    SILVER - Slightly Less than the GOLD
    BRONZE - Less Energy Efficient

    Find more info here

    http://www.plugloadsolutions.com/About.aspx

    http://www.plugloadsolutions.com/80PlusPowerSupplies.aspx

    In a nutshell, anything certified 80plus is better than anything out there with no certification
  3. The SeaSonic G Series is on sale right now that's why it's same price.I would jump on it before the sale ends if i were you.The G-Series is higher quality.Check this link it explains everything
    http://www.tomshardware.com/forum/343495-28-power-supply-efficiency-myths#
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