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How strong PSU do I need for my system


I'm upgrading my pc (or, more accurately, replacing almost everything except things like hdd, dvd drive, case etc.) and I was hoping for some general idea about what PSU to pick.

System will end up looking something like this:

HD 6770 1GB DDR5 128bit
AMD Phenom II x4 960t 3GHz
MSI 870-C45
300GB hdd (4 years old now but I don't feel like I need a bigger one)
1 DVD/RW drive

Final configuration may still be subject to small change but this is pretty much the price range I'm aiming for.

I don't necessarily ask for a specific PSU since I might not be able to buy it in my local shops, but some general idea of how strong it needs to be would be greatly appreciated, thanks.
8 answers Last reply Best Answer
More about strong system
  1. 400-450W should be fine. The power req on the 6770 isn't that big.
  2. Is that 450w as in advertised on the case, or something like calculated 12V power? I only read a few threads about PSUs and I'm not all that savvy.

    Anyway, my PC already has a 450w PSU so that looks like it's enough? And thanks for the quick reply.
  3. As something like this: (just an example), not like a 15$ PSU witch is a poor quality one and might burn and take your hole system with it. If you have a quality PSU already, use it, if it's a no name one buy another.
  4. A quality 400W+ psu with 1x PCI-E will run your specs.
    Ideally it would be a wise investment to buy a 500-600W with 2 x PCI-E 6 pins if you ever decide to change your gpu.
    Don't buy junk!
    Antec,Corsair,XFX,OZC,and Seasonic offer reliable units.
  5. Best answer
    At a minimum you should have a power supply with a combined +12 Volt continuous current rating of 24 Amps or greater and it should have at least one 6-pin PCI Express supplementary power connector.

    Total Power Supply Wattage is NOT a crucial factor in power supply selection!!! Total Continuous Amperage Available on the +12V Rail(s) is the most important.
  6. Thanks for the advice, everyone. I'll look for a PSU that fits into those parameters.
  7. Best answer selected by omil.
  8. This topic has been closed by Mousemonkey
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