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What all to consider when buying a psu?

Hello,
i am planning to buy a new power supply for my system which contains a hd6670
should i srictly go for a psu with good amps on the +12 v rail or just look at the wattages.(example like ; 400w,300w)
my total recommented psu wattage is 235w according to the psu calculator.
so can i go for the antec bp300(300w)psu
http://www.antecindia.co.in/product.php?id=NzA0NDA2
(check this please)
i will not be overclocking or going for any further upgrades
9 answers Last reply Best Answer
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  1. so is this psu in the link good?
  2. but the amp ratings on 12 vrail are 18 right?
    so isnt this okay for me
  3. first look for amp rating,always aim high amp rating.next watts and efficiency.standard 80+ or better is must to keep your electricity bill down.as already stated leave some headroom.dont go for psu on calculated basis.a psu with less load have high life span than running at full load.aim for 400w or 500w+ so this give option to upgrade later.corsair is the brand i trust in psu.
  4. looks like the bp300 only has one 4 pin ATX connector. I'm just guessing, but you probably need an 8 pin (4+4). Also, I agree with what jijomathew was saying, you don't want to cut it too close. Antec makes some good power supplies, check out the Earthwatts:

    http://www.antecindia.co.in/product.php?Family=MTE=
  5. Best answer
    assassin1234 said:
    Hello,
    i am planning to buy a new power supply for my system which contains a hd6670
    should i srictly go for a psu with good amps on the +12 v rail or just look at the wattages.(example like ; 400w,300w)
    my total recommented psu wattage is 235w according to the psu calculator.
    so can i go for the antec bp300(300w)psu
    http://www.antecindia.co.in/product.php?id=NzA0NDA2
    (check this please)
    i will not be overclocking or going for any further upgrades

    You haven't given the rest of your specs, can't imagine them being very high if the calculator only gave you 235w
    Playing Crysis with an overclocked I7-920

    Doesn't take efficiency into account, let's be generous and say they used a 90% efficient psu
    198 x .9 = 178w load or about 60% of a 300 watt power supplies capacity
    You would have to be running a heck of a system for the BP300 to not be able to handle a 6670
  6. assassin1234 said:
    so is this psu in the link good?

    You've made a couple posts now to ask the same question. You mention in the other post that you will be using a g620, and you have no plans to upgrade the machine later.
    You've received 2 types of responses: 1) That the PSU is plenty adequate for that system, and if you don't plan to upgrade, it will be fine. 2) That if you ever upgrade to a more powerful system, you may want a more powerful PSU.

    I don't know what else you're hoping to hear. You have to decide for yourself based on that information.
  7. i have decided to buy the corsair cx 430.
    i did not go for the antec bp300p because there was no big difference in price between the two
  8. thank you all for your valuable replies!!!!!!!!!!!!!!!!!!!!!
  9. Best answer selected by assassin1234.
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