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How many watts?

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July 16, 2013 3:46:17 PM

How many watts do I need for a gaming computer with a nvidia gtx 660, an i5 3470 and an ASRock
B75M R2.0 motherboard?

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a b 4 Gaming
a c 1176 ) Power supply
a c 86 Î Nvidia
a c 546 U Graphics card
July 16, 2013 8:34:00 PM

For a system using a single GeForce GTX 660 (non-Ti) graphics card NVIDIA specifies a minimum of a 450 Watt or greater system power supply that has a maximum combined +12 Volt continuous current rating of 24 Amps or greater and that has at least one 6-pin PCI Express supplementary power connector. An exception is the MSI GeForce GTX 660 HAWK 2 GB that requires two 6-pin PCI Express supplementary power connectors.

Total Power Supply Wattage is NOT the crucial factor in power supply selection!!! Total Combined Continuous Power/Current Available on the +12V Rail(s) rated at 45°C - 50°C ambient temperature, is the 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.
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a b 4 Gaming
a c 288 ) Power supply
a b Î Nvidia
a c 115 U Graphics card
July 17, 2013 4:26:02 PM

chexmixx23 said:
How many watts do I need for a gaming computer with a nvidia gtx 660, an i5 3470 and an ASRock
B75M R2.0 motherboard?


Hi - yes a quality 450w unit will have the necessary +12v amps to
run a system with a reference gtx660.

You have a non-reference model using 2 pcie connectors as opposed to
1 connector in the reference model.

This implies it will draw more current, and I believe it would be prudent to
get something a little beefier (500-520w with2 pcie connectors) in your situation.

What is your budget & where are you located?

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