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Thermaltake Smart M 750W 80 PLUS Bronze Certified

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February 10, 2013 9:13:01 PM

Hello,
I am finalizing my build for a PC (link: http://pcpartpicker.com/p/CHg7 ) and so far have a 750 watt power supply. I researched some threads and saw that the 7870 seems to sometimes take up 500 to 600 watts of power? I have found all of these random numbers for its watt consumption, and am concerned about whether my power supply is enough. So is my 750w power supply enough for my asus radeon 7870 GPU with the other pieces, or do I need to go higher? I would rather stay at my price range since I had to do some serious thinking to slide over my original $800 max budget .-.

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a c 1167 ) Power supply
February 10, 2013 10:10:42 PM

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 Radeon HD 7870 GHz Edition graphics card. It is also way more than sufficient to power your system configuration with two Radeon HD 7870 GHz Edition graphics cards in 2-way CrossFireX mode.
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