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What is the best PSU for HD 7870?

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February 6, 2013 2:22:56 AM

With MIR that is.
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a c 1167 ) Power supply
February 6, 2013 4:40:51 AM

For a system using a single reference clocked Radeon HD 7870 GHz 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 28 Amps or greater and have at least two 6-pin PCI Express supplementary power connectors.

For a system using two Radeon HD 7870 GHz Edition graphics cards in 2-way CrossFireX mode AMD specifies a minimum of an 600 Watt or greater system power supply. The power supply should also have a maximum combined +12 Volt continuous current rating of 40 Amps or greater and have at least four 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.

The Thermaltake SMART M750W (SP-750M), with its maximum combined +12 Volt continuous current rating of 62 Amps and with four (6+2)-pin PCI Express supplementary power connectors, is way more than sufficient to power your system configuration with a single reference clocked Radeon HD 7870 GHz Edition graphics card. It is also way more than sufficient to power your system configuration with two reference clocked Radeon HD 7870 GHz Edition graphics cards in 2-way CrossFireX mode. There is more than enough spare capacity to handle any of the factory overclocked variants of the Radeon HD 7870 GHz Edition.
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February 6, 2013 11:22:01 PM

Best answer selected by whitewolf2469.
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