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How strong PSU do I need for my system

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Last response: in Components
January 29, 2012 2:56:10 PM


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.

More about : strong psu system

a b ) Power supply
January 29, 2012 3:02:24 PM

400-450W should be fine. The power req on the 6770 isn't that big.
January 29, 2012 3:08:29 PM

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.
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a c 275 ) Power supply
January 29, 2012 5:06:55 PM

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.

Best solution

a c 1665 ) Power supply
January 29, 2012 5:17:01 PM

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.
January 29, 2012 5:48:40 PM

Thanks for the advice, everyone. I'll look for a PSU that fits into those parameters.
January 29, 2012 5:48:58 PM

Best answer selected by omil.
a b ) Power supply
January 29, 2012 7:16:25 PM

This topic has been closed by Mousemonkey