Is an XFX 550W enough for overclocking i5-3570k and 7870 xt?

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rcart123

rcart123

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Apr 2, 2013
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Planning on doing some modest overclocking on both an i5-3570k (to around 4 - 4.2ghz) and a Sapphire 7870 xt (not sure how much overclocking on this yet - nothing extraordinary though)

is the XFX 550W PSU enough to safely handle this?

if not, any recommendations on a good quality alternative without breaking the bank?

looking to spend less than £75 ideally. the XFX 550W is ~£50
 
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ko888

ko888

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Feb 18, 2009
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For a system using a single reference clocked Radeon HD 7870 Boost Edition (Tahiti LE) graphics card AMD specifies a minimum of a 500 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 33 Amps or greater and have at least two 6-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Sufficient Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the most critical factor.

Overclocking of the CPU and/or GPU(s) will require an additional increase to the maximum combined +12 Volt continuous current ratings, recommended above, to meet the increase in power required for the overclock. The additional amount required will depend on the magnitude of the overclock being attempted. Since your CPU overclock is less than 4.6 GHz you don't need to add any extra. Overclocking the graphics card may require an extra 2 Amps during gaming and an extra 5 Amps if you run FurMark or some other equivalent GPU stress testing utility.

The XFX 550W Core Edition Full Wired (Bronze) (P1-550S-XXB9), with its maximum combined +12 Volt continuous current rating of 44 Amps and with one 6-pin and one (6+2)-pin PCI Express supplementary power connectors, is more than sufficient to power your system configuration with a single Radeon HD 7870 Boost Edition (Tahiti LE) graphics card.
 
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DarkSable

DarkSable

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Sep 27, 2012
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Where does everyone copy+paste these from? They're sexy.

 
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rcart123

rcart123

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Apr 2, 2013
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i agree - it's certainly a colourful and informative feast for the eyes.
 
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ko888

ko888

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Feb 18, 2009
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I didn't copy anyone.
 
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rcart123

rcart123

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Apr 2, 2013
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pretty sure he just means the nice format it's in - pretty cool!
 
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DarkSable

DarkSable

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Sep 27, 2012
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No, sorry, I just see a number of you guys in the power supply forums with answers formatted like that - I presumed there's a website or something that you can plug the numbers into and it'll pop out that sorta solution. SR-71 Blackbird uses this format as well.


 
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