Power supply Suggestions

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ko888
For a system using a single AMD reference design Radeon HD 7870 Boost Edition 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) may require an additional increase to...
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ko888

ko888

Titan
Feb 18, 2009
16,708
41
84,990
For a system using a single AMD reference design Radeon HD 7870 Boost Edition 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) may 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.

The Seasonic S12II-520 Bronze (SS-520GB) power supply unit, with its maximum combined +12 Volt continuous current rating of 40 Amps and with one 6-pin and one (6+2)-pin PCI Express supplementary power connectors, is sufficient to power your system configuration with a single Radeon HD 7870 Boost Edition graphics card.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151094

or

Seasonic S12II-620 Bronze (SS-620GB)
• +12V Combined @ 48 Amps
• 1 x 6-Pin, 1 x 6+2-Pin PCI Express supplementary power connectors
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151096
 
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dish_moose

dish_moose

Splendid
Jul 7, 2010
2,952
0
21,460
^all good PSUs - I like a psu that has a little extra headroom - PSUs will operate most efficiently near the middle of their capacity. The XFX is made by Seasonic and is very quiet in normal operation and at $69 after rebate is a good price.
-Bruce
 
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